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Lenovo Yoga 900S 12ISK Convertible Review

Silent convertible. The 12.5-inch Yoga 900S is one of the most comfortable Yoga convertibles we've used. There are, however, a couple of key drawbacks to keep in mind.

Not to be confused with the excellent 13.3-inch Yoga 900, the 12.5-inch Yoga 900S is the smaller, lighter, and more portable version with design concepts lifted almost directly from its bigger sibling. Its Core M-only options and four-figure price tag puts it in direct competition with the MacBook 12 and other higher-end Ultrabooks that tend to carry more powerful ULV Skylake processors. However, there's no denying that its slim size and 360-degree hinges can potentially replace the need for a separate tablet to make this a much more versatile solution compared to other alternatives. Some of Lenovo's previous attempts at an ultra-portable Yoga include the Yoga 3 11, ThinkPad Yoga 12, ThinkPad Yoga 11e, Yoga 11S, and Yoga 2 11.

We'll be comparing the Yoga 900S to a few Core M-only systems like the HP EliteBook Folio G1 or MacBook 12 and also to similarly sized Ultrabooks like the HP Spectre 13 and Dell XPS 13 that retail for similar prices. Is the versatility of the Lenovo enough to propel it past the competition?

See our existing reviews on previous Yoga notebooks for a glimpse of how the series has evolved over the last few years:

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Lenovo Yoga 900S-12ISK-80ML (Yoga 900 Series)
Graphics adapter
Intel HD Graphics 515, 20.19.15.4380
Memory
4009 MB 
, 933 MHz, 12-12-15-34, Dual-Channel, Soldered
Display
12.5 inch 16:9, 1920 x 1080 pixel 176 PPI, Capacitive, IPS, Name: AUO B125HAN02.2, ID: AUO226D, glossy: yes
Mainboard
Intel Skylake-Y Premium PCH
Storage
Samsung PM951 NVMe MZVLV128, 128 GB 
Soundcard
Intel Skylake-U/Y PCH - High Definition Audio
Connections
1 USB 2.0, 2 USB 3.0 / 3.1 Gen1, Brightness Sensor, Sensors: Accelerometer
Networking
Broadcom 43A3 (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5), Bluetooth 4.0
Size
height x width x depth (in mm): 12.8 x 305 x 208 ( = 0.5 x 12.01 x 8.19 in)
Battery
53 Wh Lithium-Polymer, 4-cell
Operating System
Microsoft Windows 10 Home 64 Bit
Additional features
Speakers: Stereo with Dolby Audio Premium, Keyboard: Chiclet, Keyboard Light: yes, Quick Start guide, Lenovo Telephone Support list, Lenovo OneKey Recovery, Lenovo ID, McAfee Internet Security, 12 Months Warranty
Weight
1.01 kg ( = 35.63 oz / 2.23 pounds), Power Supply: 193 g ( = 6.81 oz / 0.43 pounds)
Price
1100 USD
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Case

The Yoga 900 series consists of flagship models in contrast to the mainstream Yoga 700 and 500 series. Thus, the 900S does not disappoint visually as it still carries the same look and feel as the 900 including the smooth and rounded matte outer surfaces, carbon fiber chassis, rubberized palm rests, edges, and corners, and wristband hinge that is exclusive to high-end Yoga SKUs. A minor complaint is that there is no notch on the front for a good grip, so opening the lid can be difficult even with two hands. Otherwise, we're relieved to see that Lenovo did not taken any design shortcuts just because the system is smaller and less powerful than the proper Yoga 900. It may be the size of a netbook, but it certainly feels much better than one.

There is also not much to complain regarding workmanship and build quality. We can notice no unintended gaps on our test unit and the lid itself is resistant to major twisting and depression. Pushing down on the center of the keyboard will depress it slightly, but the base is otherwise firm all around. Perhaps more importantly, the hinges feel strong and consistent up to its maximum angle for easy switching between modes.

As for size and weight, the 900S is thinner than even the MacBook 12 and just barely cracks 1 kg. The system is actually comfortable to hold with one hand and to use in tablet mode, which is more than what we can say for larger and heavier convertibles like the Yoga 13, Toshiba Satellite Radius, or HP Spectre x360. By simply being smaller and lighter, the 900S is almost as ergonomic to use as a regular tablet when outdoors with the invaluable ability to turn into a laptop when needed.

324 mm / 12.8 inch 225 mm / 8.86 inch 14.9 mm / 0.587 inch 1.3 kg2.8 lbs325 mm / 12.8 inch 229 mm / 9.02 inch 10.4 mm / 0.4094 inch 1.2 kg2.56 lbs309.9 mm / 12.2 inch 220 mm / 8.66 inch 17.8 mm / 0.701 inch 1.3 kg2.96 lbs304 mm / 12 inch 201 mm / 7.91 inch 17 mm / 0.669 inch 1.2 kg2.69 lbs305 mm / 12 inch 208 mm / 8.19 inch 12.8 mm / 0.504 inch 1 kg2.23 lbs292 mm / 11.5 inch 209 mm / 8.23 inch 12.4 mm / 0.4882 inch 979 g2.16 lbs280.5 mm / 11 inch 196.5 mm / 7.74 inch 13.1 mm / 0.516 inch 927 g2.04 lbs

Connectivity

Available ports are limited due to the small and thin build with nothing more than 3x USB ports (1x USB 2.0, 1x USB 3.0, 1x USB Type-C) and an audio jack. Video-out is supported through the USB Type-C port with a Yoga 900 adapter. The Yoga 260 offers many more features while the MacBook 12 has even fewer options, so the Yoga 900S is a solid middle-ground regarding connectivity. Still, we would have liked an SD or MicroSD reader here considering the price.

Front: No connectivity
Front: No connectivity
Left: AC Adapter + USB 2.0 port, USB Type-C Gen. 1, OneKey Recovery
Left: AC Adapter + USB 2.0 port, USB Type-C Gen. 1, OneKey Recovery
Rear: No connectivity
Rear: No connectivity
Right: Power button, 3.5 mm combo, USB 3.0
Right: Power button, 3.5 mm combo, USB 3.0

Communication

WLAN is provided by an uncommon dual-band 2x2 Broadcom 43A3 module capable of transfer rates of up to 768 Mbps on 802.11ac wireless with integrated Bluetooth 4.0. We experienced no connectivity or dropout issues when connected to our Linksys EA8500 test router during our time with the unit. There are no WWAN or GPS options available for this particular Yoga.

Accessories

There are no included extras outside of the power adapter, Quick Start guide, and telephone support list. A handful of Ultrabooks may throw in USB adapters such as the Zenbook and its USB-to-RJ45 adapter or the Spectre and its USB Type-C to USB Type-A adapter.

Maintenance

We weren't expecting serviceability to be so easy on the 900S especially when considering its size class and highly integrated components. Nonetheless, a T05 Torx wrench is all that is required to safely remove the bottom panel and to expose the large battery, WLAN module, M.2 2280 SSD, and copper heat plate over the processor and memory modules. RAM is fixed so there are no expandability options here.

Warranty

The standard one-year warranty applies to all new purchases. As usual from Lenovo, the manufacturer offers a wide range of warranty options including up to 3 years of onsite service and accidental damage protection for an additional $179.

A total of 10 screws must be removed to open the bottom plate
A total of 10 screws must be removed to open the bottom plate

Input Devices

Keyboard

The Chiclet keyboard (25.5 x 9.5 cm) provides two levels of White backlight lighting and the Gold-colored keys visually match the hinge and outer lid of the notebook. This is also where many users may find the Yoga 900S unlikable as the keys have very shallow travel even for a thin notebook. As shown in the picture below, the keyboard keys are already nearly on the same plane as the surrounding surface. Feedback suffers as a result and the Space bar in particular feels softer than usual when pressed. It may take some time for new users to become accustomed to the feel of the keyboard and, unlike on certain Yoga models, there is no Lift 'n Lock feature for the Yoga 900S.

On the flip side, typing is quiet and almost clatter-free due to the soft feedback and shallow travel. The Directional keys are also large and easier to use than on some 15-inch notebooks where they can feel squeezed between the QWERTY and NumPad keys. A volume rocker would have been a useful addition on the side of the device.

Touchpad

The touchpad (9.25 x 6.25 cm) is smooth to the touch and adequately sized for a 12-inch convertible. Its dark gray plastic surface, however, attracts fingerprints quite easily whereas the Gold keyboard keys do a much better job at hiding them.

Basic cursor control works reliably on the touchpad and the Synaptics software is able to recognize up to four fingers simultaneously. Multi-touch gestures are a little difficult, however, as even pinch-to-zoom is hit or miss and will not always register. Meanwhile, the integrated mouse keys have a firm auditory click from the shallow travel and are easy to press for comfortable use. Users may find that using the touchscreen itself can be more responsive and ergonomic than the touchpad for some inputs.

Standard QWERTY keys with no auxiliary buttons
Standard QWERTY keys with no auxiliary buttons
Keys have very shallow travel
Keys have very shallow travel

Display

The 1080p touchscreen provides crisp and clean images with no major graininess issues. A very similar AUO226D panel can also be found on the EliteBook Folio G1 where the two systems share very similar color spaces and contrast ratios of over 1000:1, though the overlying display panel on the HP is matte compared to glossy on our Lenovo. The backlight is no brighter or dimmer than most mainstream Ultrabooks as the 300 to 350 nit range is common. Our measurements below only reflect the 1080p configuration since the 1440p configuration utilizes a different panel altogether.

Uneven backlight bleeding is very minimal and essentially unnoticeable on our test unit. A keen eye will still see very slight bleeding around the bottom corners and top edge if viewing videos in letterbox mode.

Very minimal uneven backlight bleeding
Very minimal uneven backlight bleeding
Subpixel array (176 PPI)
Subpixel array (176 PPI)
336.3
cd/m²
328.7
cd/m²
323.8
cd/m²
329.8
cd/m²
327.9
cd/m²
323.1
cd/m²
314.8
cd/m²
340.6
cd/m²
307.1
cd/m²
Distribution of brightness
X-Rite i1Pro Basic 2
Maximum: 340.6 cd/m² Average: 325.8 cd/m² Minimum: 3.014 cd/m²
Brightness Distribution: 90 %
Center on Battery: 327.9 cd/m²
Contrast: 1322:1 (Black: 0.248 cd/m²)
ΔE Color 3.43 | 0.6-29.43 Ø6
ΔE Greyscale 1.88 | 0.64-98 Ø6.2
64% sRGB (Argyll 3D) 41.3% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.08
Lenovo Yoga 900S-12ISK-80ML
12.5, 1920x1080
Lenovo ThinkPad Yoga 260 20FD001XGE
12.5, 1920x1080
HP Spectre 13
13.3, 1920x1080
Dell XPS 13 2016 9350 (FHD, i7-6560U)
13.3, 1920x1080
Apple MacBook 12 (Early 2016) 1.1 GHz
12, 2304x1440
Response Times
-70%
-56%
-24%
-34%
Response Time Grey 50% / Grey 80% *
31.6 (13.2, 18.4)
64 (30, 34)
-103%
50.8 (20, 30.8)
-61%
42.8 (16, 26.8)
-35%
41.2 (15.6, 25.6)
-30%
Response Time Black / White *
22 (4.8, 17.2)
30 (5, 25, Nano Seconds ns)
-36%
33.2 (7.2, 26)
-51%
24.8 (5.2, 19.6)
-13%
30.4 (6.8, 23.6)
-38%
PWM Frequency
62.5 (39)
Screen
-74%
12%
1%
12%
Brightness middle
327.9
371
13%
300.5
-8%
385
17%
387
18%
Brightness
326
335
3%
305
-6%
350
7%
358
10%
Brightness Distribution
90
84
-7%
76
-16%
86
-4%
88
-2%
Black Level *
0.248
0.29
-17%
0.184
26%
0.17
31%
0.47
-90%
Contrast
1322
1279
-3%
1633
24%
2265
71%
823
-38%
Colorchecker DeltaE2000 *
3.43
8.51
-148%
2.64
23%
4.17
-22%
1.6
53%
Colorchecker DeltaE2000 max. *
7.13
20.43
-187%
5.06
29%
7.61
-7%
4
44%
Greyscale DeltaE2000 *
1.88
9.23
-391%
2.8
-49%
5.39
-187%
1
47%
Gamma
2.08 106%
2.24 98%
2.16 102%
2.12 104%
2.26 97%
CCT
6460 101%
6759 96%
6999 93%
7404 88%
6680 97%
Color Space (Percent of AdobeRGB 1998)
41.3
41
-1%
60.9
47%
62.7
52%
61.6
49%
Color Space (Percent of sRGB)
64
62
-3%
94.3
47%
99.8
56%
82.2
28%
Total Average (Program / Settings)
-72% / -73%
-22% / 0%
-12% / -3%
-11% / 4%

* ... smaller is better

Color coverage is measured to be 64 percent of the sRGB standard, which is typical for a mainstream IPS panel. This is comparable to the Yoga 260, but well below that of the Spectre and XPS 13 where their panels target the full sRGB spectrum for deeper and more accurate colors. In fact, the gamut of the 900S is only about 66 percent of the display found on the Spectre. Fortunately, the more limited color space means little to the target audience of the 900S as the convertible is not designed for professional digital artists or editing applications where accurate colors are required.

vs. sRGB
vs. sRGB
vs. AdobeRGB
vs. AdobeRGB
vs. Apple MacBook 12
vs. Apple MacBook 12
vs. HP Spectre
vs. HP Spectre

Further measurements with an X-Rite spectrophotometer reveal accurate grayscale and good RGB balance. A quick calibration has very little effect on the final picture, so users shouldn't need to worry about having to calibrate their panels out-of-the-box. Colors are generally accurate as well, but will still grow more inaccurate the higher the saturation level due to the panel's limited sRGB coverage.

Grayscale before calibration
Grayscale before calibration
Saturation Sweeps before calibration
Saturation Sweeps before calibration
ColorChecker before calibration
ColorChecker before calibration
Grayscale after calibration
Grayscale after calibration
Saturation Sweeps after calibration
Saturation Sweeps after calibration
ColorChecker after calibration
ColorChecker after calibration

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
22 ms ... rise ↗ and fall ↘ combined↗ 4.8 ms rise
↘ 17.2 ms fall
The screen shows good response rates in our tests, but may be too slow for competitive gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 26 % of all devices are better.
This means that the measured response time is better than the average of all tested devices (24.9 ms).
       Response Time 50% Grey to 80% Grey
31.6 ms ... rise ↗ and fall ↘ combined↗ 13.2 ms rise
↘ 18.4 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 21 % of all devices are better.
This means that the measured response time is better than the average of all tested devices (39.7 ms).

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM detected 62.5 Hz ≤ 39 % brightness setting

The display backlight flickers at 62.5 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 39 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 62.5 Hz is very low, so the flickering may cause eyestrain and headaches after extended use.

In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 9352 (minimum: 43 - maximum: 142900) Hz was measured.

Outdoor usability is average despite the bright backlight because of the very glossy panel. Reflections and glare are essentially inevitable if working outdoors. The 360-degree hinge comes in handy here to reduce as much glare as possible, but the screen will still wash out if under direct sunlight.

Viewing angles are otherwise excellent from the IPS panel which is crucial for a Yoga convertible. Colors and contrast do not shift dramatically if viewing on landscape or portrait. Apparent contrast still decreases if not viewing directly at the screen, but this is a common characteristic of IPS displays.

Outdoors under shade
Outdoors under shade
Outdoors under shade
Outdoors under shade
Outdoors under direct sunlight
Outdoors under direct sunlight
Outdoors under direct sunlight
Outdoors under direct sunlight
Wide IPS viewing angles
Wide IPS viewing angles

Performance

A few configurable options exist including ours with the Core m5-6Y54, 4 GB LPDDR3 RAM, 128 GB SSD, and 1080p touchscreen. The highest-end configuration includes the Core m7-6Y75, 8 GB LPDDR3 RAM, 256 GB SSD, and 1440p touchscreen for only $50 more at the time of writing and is a significant upgrade considering the price difference. There are no ULV Skylake options since the 900S convertible is designed for travel, word processing, and other low multimedia loads compared to more powerful standard Ultrabooks.

 

Processor

The Core m5-6Y54 in our 900S performs slower than the average Core m5-6Y54 in our database according to CineBench benchmarks. We compared our results to the Lenovo Ideapad Miix 700 that carries the exact same processor, but scores on the Miix are significantly higher especially in single-threaded benchmarks. The low scores can be explained by the Turbo Boost throttling behavior of the 900S as detailed in the Stress Test section below.

Raw processor performance is still significantly better than an Atom Z8300 on very low-cost netbooks and tablets despite the poor Core m5-6Y54 performance from the 900S. See our dedicated CPU page on the processor for additional technical details and comparisons.

CineBench R15
CineBench R15
CineBench R11.5 64-bit
CineBench R11.5 64-bit
CineBench R10 32-bit
CineBench R10 32-bit
Cinebench R15
CPU Single 64Bit (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
80 Points ∼37%
HP Omen 15-ax007ng
GeForce GTX 965M, 6700HQ, Adata IM2S3138E-128GM-B
147 Points ∼67% +84%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
130 Points ∼60% +63%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
125 Points ∼57% +56%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
119 Points ∼55% +49%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
99 Points ∼45% +24%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
91 Points ∼42% +14%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
90 Points ∼41% +13%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
27 Points ∼12% -66%
CPU Multi 64Bit (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
173 Points ∼4%
HP Omen 15-ax007ng
GeForce GTX 965M, 6700HQ, Adata IM2S3138E-128GM-B
678 Points ∼15% +292%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
298 Points ∼7% +72%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
266 Points ∼6% +54%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
234 Points ∼5% +35%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
200 Points ∼5% +16%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
218 Points ∼5% +26%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
94 Points ∼2% -46%
Cinebench R11.5
CPU Single 64Bit (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
0.57 Points ∼23%
HP Omen 15-ax007ng
GeForce GTX 965M, 6700HQ, Adata IM2S3138E-128GM-B
1.68 Points ∼69% +195%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
1.51 Points ∼62% +165%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
1.37 Points ∼56% +140%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
1.08 Points ∼44% +89%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
1.06 Points ∼43% +86%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
1 Points ∼41% +75%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
0.95 Points ∼39% +67%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
0.35 Points ∼14% -39%
CPU Multi 64Bit (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
1.59 Points ∼4%
HP Omen 15-ax007ng
GeForce GTX 965M, 6700HQ, Adata IM2S3138E-128GM-B
7.45 Points ∼17% +369%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
3.25 Points ∼7% +104%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
3.2 Points ∼7% +101%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
2.62 Points ∼6% +65%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
2.08 Points ∼5% +31%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
2.35 Points ∼5% +48%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
2.29 Points ∼5% +44%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
1.17 Points ∼3% -26%
Cinebench R10
Rendering Single 32Bit (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
3026 Points ∼28%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
4894 Points ∼45% +62%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
4901 Points ∼45% +62%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
3690 Points ∼34% +22%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
3353 Points ∼31% +11%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
948 Points ∼9% -69%
Rendering Multiple CPUs 32Bit (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
3848 Points ∼6%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
10291 Points ∼16% +167%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
9677 Points ∼15% +151%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
6340 Points ∼10% +65%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
7355 Points ∼11% +91%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
2911 Points ∼4% -24%
wPrime 2.0x - 1024m (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
969.608 s * ∼11%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
487.42 s * ∼6% +50%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
524.919 s * ∼6% +46%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
698 s * ∼8% +28%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
793 s * ∼9% +18%
Super Pi Mod 1.5 XS 32M - --- (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
858.752 Seconds * ∼4%
Lenovo ThinkPad T450 20BVG733PB
HD Graphics 5500, 5600U, Samsung SSD 850 EVO 250GB
622.083 Seconds * ∼3% +28%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
684.827 Seconds * ∼3% +20%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
640 Seconds * ∼3% +25%
Lenovo IdeaPad Miix 700
HD Graphics 515, 6Y54, Samsung MZNLN128HCGR-000L2
785.494 Seconds * ∼3% +9%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
3995 Seconds * ∼18% -365%
Toshiba Satellite Click 10 LX0W-C-104
HD Graphics (Cherry Trail), Z8300, 32 GB eMMC Flash
2252.64 Seconds * ∼10% -162%

* ... smaller is better

Cinebench R10 Shading 32Bit
4740
Cinebench R10 Rendering Multiple CPUs 32Bit
3848
Cinebench R10 Rendering Single 32Bit
3026
Cinebench R11.5 OpenGL 64Bit
16.86 fps
Cinebench R11.5 CPU Multi 64Bit
1.59 Points
Cinebench R11.5 CPU Single 64Bit
0.57 Points
Cinebench R15 Ref. Match 64Bit
97.8 %
Cinebench R15 OpenGL 64Bit
22.37 fps
Cinebench R15 CPU Multi 64Bit
173 Points
Cinebench R15 CPU Single 64Bit
80 Points
Help

System Performance

PCMark 8 ranks our Lenovo in the same ballpark as the Apple MacBook 12. Systems with ULV processors score are about 20 to 30 percent higher including the ThinkPad T450s and Spectre. The limited processing power of the Core m5 puts the 900S at a disadvantage even against some popular tablets.

We experienced no notable software or hardware issues during our time with the Lenovo convertible.

PCMark 8 Home Accelerated
PCMark 8 Home Accelerated
PCMark 8 Creative Accelerated
PCMark 8 Creative Accelerated
PCMark 8 Work Accelerated
PCMark 8 Work Accelerated
PCMark 8
Work Score Accelerated v2 (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
3912 Points ∼60%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
4498 Points ∼69% +15%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
4052 Points ∼62% +4%
Lenovo ThinkPad T450s-20BWS03F00
HD Graphics 5500, 5600U, Intel SSD Pro 2500 Series SSDSC2BF360A5L
4394 Points ∼67% +12%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
4058 Points ∼62% +4%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
3550 Points ∼54% -9%
Creative Score Accelerated v2 (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
3194 Points ∼30%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
4222 Points ∼40% +32%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
4431 Points ∼42% +39%
Lenovo ThinkPad T450s-20BWS03F00
HD Graphics 5500, 5600U, Intel SSD Pro 2500 Series SSDSC2BF360A5L
3613 Points ∼34% +13%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
3583 Points ∼34% +12%
Home Score Accelerated v2 (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
2736 Points ∼45%
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
3549 Points ∼58% +30%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
3394 Points ∼56% +24%
Lenovo ThinkPad T450s-20BWS03F00
HD Graphics 5500, 5600U, Intel SSD Pro 2500 Series SSDSC2BF360A5L
3270 Points ∼54% +20%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
2976 Points ∼49% +9%
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
2550 Points ∼42% -7%
PCMark 8 Home Score Accelerated v2
2736 points
PCMark 8 Creative Score Accelerated v2
3194 points
PCMark 8 Work Score Accelerated v2
3912 points
Help

Storage Devices

A single NVMe M.2 slot is available for internal storage and our 128 GB Samsung in our test unit performed slower than expected for a NVMe SSD. Sequential read rate is under 1000 MB/s unlike on a handful of its competitors equipped with NVMe drives and sequential write rate is even slower than many SATA III SSDs. While users aren't likely to notice during day-to-day use, this is still one of the slower NVMe SSDs we've tested. We can't speak for the 256 GB configuration, however, as the Samsung PM951 MZVLV256 tends to perform faster according to our tests on other notebooks.

See our growing table of SSDs and HDDs for more benchmarks and comparisons.

AS SSD
AS SSD
CDM
CDM
PCMark 8 Storage
PCMark 8 Storage
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
Lenovo ThinkPad Yoga 260 20FD001XGE
HD Graphics 520, 6500U, Samsung SSD PM871 MZNLN256HCHP
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
Dell XPS 13 2016 9350 (FHD, i7-6560U)
Iris Graphics 540, 6560U, Samsung PM951 NVMe MZ-VLV256D
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
AS SSD
4%
80%
31%
64%
Copy Game MB/s
126.37
239.04
89%
178.2
41%
Copy Program MB/s
100.66
262.29
161%
98.1
-3%
Copy ISO MB/s
131.06
352.84
169%
222.3
70%
545
316%
Score Total
1168
1037
-11%
2335
100%
1684
44%
Score Write
240
361
50%
382
59%
318
33%
Score Read
632
448
-29%
1325
110%
935
48%
Access Time Write *
0.038
0.051
-34%
0.035
8%
0.035
8%
Access Time Read *
0.076
0.082
-8%
0.047
38%
0.088
-16%
0.186
-145%
4K-64 Write
134.41
262.3
95%
248.43
85%
186.3
39%
283
111%
4K-64 Read
504.65
370.85
-27%
1153.43
129%
767.4
52%
509
1%
4K Write
90.9
70.03
-23%
103.66
14%
108.3
19%
22.1
-76%
4K Read
35.76
29.07
-19%
37.06
4%
35.4
-1%
16.4
-54%
Seq Write
145.65
282.87
94%
295.5
103%
235.3
62%
651
347%
Seq Read
920.01
482.26
-48%
1346.66
46%
1323.4
44%
1056
15%

* ... smaller is better

Samsung PM951 NVMe MZVLV128
Sequential Read: 826.3 MB/s
Sequential Write: 153 MB/s
512K Read: 470.3 MB/s
512K Write: 153.3 MB/s
4K Read: 40.74 MB/s
4K Write: 118.4 MB/s
4K QD32 Read: 400.8 MB/s
4K QD32 Write: 153.6 MB/s

GPU Performance

Raw graphics performance from the integrated HD Graphics 515 is again below what we were expecting. We compared our results to the HP EliteBook G1 with the same Core m5-6Y54 CPU and HD 515 GPU only to see that the HP can score at least 50 percent higher than the Lenovo in 3DMark benchmarks. We reran the tests to confirm and the final scores were not significantly any different. Overall graphics performance from the 900S is 20 to 30 percent below that of the HD 4400 as found on older Haswell processors.

See our dedicated GPU page on the HD Graphics 515 for more technical details and benchmark comparisons.

Ice Storm
Ice Storm
Ice Storm Unlimited
Ice Storm Unlimited
Ice Storm Extreme
Ice Storm Extreme
3DMark 11
3DMark 11
Cloud Gate
Cloud Gate
Fire Strike
Fire Strike
3DMark 11
1280x720 Performance Combined (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
778 Points ∼3%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
2255 Points ∼10% +190%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
1086 Points ∼5% +40%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
1179 Points ∼5% +52%
Lenovo B50-70 59-407828
HD Graphics 4400, 4210U, Samsung SSD 850 EVO 250GB
810 Points ∼4% +4%
Lenovo ThinkPad L440 20AT004QGE
HD Graphics 4600, 4300M, Intel SSD 520 Series SSDSC2BW180A3L
631 Points ∼3% -19%
Asus Zenbook UX360CA-FC060T
HD Graphics 515, 6Y30, Lite-On CV1-8B128
622 Points ∼3% -20%
1280x720 Performance GPU (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
803 Points ∼2%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
2450 Points ∼5% +205%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
1254 Points ∼2% +56%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
1154 Points ∼2% +44%
Lenovo B50-70 59-407828
HD Graphics 4400, 4210U, Samsung SSD 850 EVO 250GB
845 Points ∼2% +5%
Lenovo ThinkPad L440 20AT004QGE
HD Graphics 4600, 4300M, Intel SSD 520 Series SSDSC2BW180A3L
773 Points ∼2% -4%
Asus Zenbook UX360CA-FC060T
HD Graphics 515, 6Y30, Lite-On CV1-8B128
714 Points ∼1% -11%
3DMark
1920x1080 Fire Strike Graphics (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
504 Points ∼1%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
1477 Points ∼4% +193%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
844 Points ∼2% +67%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
762 Points ∼2% +51%
Lenovo B50-70 59-407828
HD Graphics 4400, 4210U, Samsung SSD 850 EVO 250GB
664 Points ∼2% +32%
1280x720 Cloud Gate Standard Graphics (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
4309 Points ∼2%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
11650 Points ∼6% +170%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
7035 Points ∼4% +63%
Lenovo ThinkPad X1 Tablet
HD Graphics 515, 6Y75, Samsung PM871 MZYLN256HCHP
5769 Points ∼3% +34%
Lenovo B50-70 59-407828
HD Graphics 4400, 4210U, Samsung SSD 850 EVO 250GB
5847 Points ∼3% +36%
Lenovo ThinkPad L440 20AT004QGE
HD Graphics 4600, 4300M, Intel SSD 520 Series SSDSC2BW180A3L
4928 Points ∼3% +14%
Asus Zenbook UX360CA-FC060T
HD Graphics 515, 6Y30, Lite-On CV1-8B128
5510 Points ∼3% +28%
1920x1080 Ice Storm Extreme Graphics (sort by value)
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
22497 Points ∼3%
Microsoft Surface Pro 4 Core i7
Iris Graphics 540, 6650U, Samsung MZFLV256 NVMe
68398 Points ∼9% +204%
3DMark 11 Performance
887 points
3DMark Ice Storm Standard Score
34458 points
3DMark Cloud Gate Standard Score
3231 points
3DMark Fire Strike Score
458 points
3DMark Fire Strike Extreme Score
218 points
Help

Gaming Performance

The GPU is lagging behind the average for the Core m5-6Y54 when playing games. The EliteBook Folio G1, for example, edges out the Yoga 900S in all benchmarking presets for Bioshock Infinite. Modern 3D titles are essentially unplayable and even less intensive top-down titles like Starcraft II or DOTA 2 are only playable on very low graphical settings.

BioShock Infinite
1366x768 High Preset
Lenovo IdeaPad 710S-13ISK
Iris Graphics 540, 6560U, Samsung PM951 NVMe MZVLV256
35.7 fps ∼100% +163%
Lenovo IdeaPad 300-15IBR
GeForce 920M, N3700, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
24.8 fps ∼69% +82%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
15.3 fps ∼43% +13%
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
13.6 fps ∼38%
Fujitsu Lifebook E544
HD Graphics 4600, 4210M, Seagate ST500LM000 Solid State Hybrid Drive
11.9 fps ∼33% -12%
Lenovo Yoga 3 Pro 13 80HE004LGE
HD Graphics 5300, 5Y70, Samsung SSD PM851 MZNTE512HMJH
10.8 fps ∼30% -21%
1366x768 Medium Preset
Lenovo IdeaPad 710S-13ISK
Iris Graphics 540, 6560U, Samsung PM951 NVMe MZVLV256
42.2 fps ∼100% +164%
Lenovo IdeaPad 300-15IBR
GeForce 920M, N3700, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
28.53 fps ∼68% +78%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
24.8 fps ∼59% +55%
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
16 fps ∼38%
Lenovo Yoga 3 Pro 13 80HE004LGE
HD Graphics 5300, 5Y70, Samsung SSD PM851 MZNTE512HMJH
14.8 fps ∼35% -7%
Fujitsu Lifebook E544
HD Graphics 4600, 4210M, Seagate ST500LM000 Solid State Hybrid Drive
14.6 fps ∼35% -9%
1280x720 Very Low Preset
Lenovo IdeaPad 710S-13ISK
Iris Graphics 540, 6560U, Samsung PM951 NVMe MZVLV256
69.1 fps ∼100% +134%
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
49.9 fps ∼72% +69%
Lenovo IdeaPad 300-15IBR
GeForce 920M, N3700, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
40.9 fps ∼59% +39%
Lenovo Yoga 3 Pro 13 80HE004LGE
HD Graphics 5300, 5Y70, Samsung SSD PM851 MZNTE512HMJH
30.8 fps ∼45% +4%
Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
29.5 fps ∼43%
Fujitsu Lifebook E544
HD Graphics 4600, 4210M, Seagate ST500LM000 Solid State Hybrid Drive
29.3 fps ∼42% -1%
low med. high ultra
StarCraft II: Heart of the Swarm (2013) 80.824.914.6fps
BioShock Infinite (2013) 29.51613.64fps
Overwatch (2016) 13.88.4fps

Stress Test

The below average benchmark results from the 900S makes sense after closer analyses with Prime95 and FurMark. The system quickly and easily throttles when subjected to extreme loads. According to our observations, the 900S will cycle its CPU and GPU clock rates to maintain a mid 50 C operating range and to prevent core temperatures from reaching anything higher than 70 C. Running Prime95 will cycle the CPU from 1.1 GHz to 1.6 GHz compared to the processor's maximum rated Turbo Boost of 2.4 GHz for multi-threaded workloads. The integrated GPU behaves similarly and both CPU and GPU clock rates will throttle even further when running both Prime95 and FurMark simultaneously.

Unigine Valley is more representative of gaming loads than the above mentioned benchmarks. Nonetheless, the system still throttles as it struggles to maintain consistent clock rates. The GPU itself is rated for a maximum Turbo clock rate of 1000 MHz and it can barely maintain 600 MHz here on the Lenovo.

Running on battery power will not throttle the system any further. A 3DMark 11 run on batteries returns Graphics and Physics scores of 858 and 2256 points, respectively, compared to 803 and 2333 points when connected to mains.

Prime95 stress
Prime95 stress
FurMark stress
FurMark stress
Prime95+FurMark stress
Prime95+FurMark stress
Unigine Valley stress
Unigine Valley stress

CPU Clock (GHz) GPU Clock (MHz) Average CPU Temperature (C)

Prime95 Stress

1.1 - 1.6 -- 52 - 55

FurMark Stress

-- 300 - 500 54 - 58

Prime95 + FurMark Stress

0.5 - 0.7 300 - 400 54 - 58

Unigine Valley Stress

0.6 - 0.9 350 - 600 54 - 58

Emissions

Temperature

Instead of a traditional heat pipes, the 900S utilizes a flat copper plate for heat dissipation
Instead of a traditional heat pipes, the 900S utilizes a flat copper plate for heat dissipation

With no active fans to draw air and expel heat, surface temperature development on the 900S behaves very much like a point source. Lenovo has cleverly positioned the processor as close to the rear corner as possible for more comfortable hands when typing. This also means that the right half of the notebook will always be noticeably warmer than the right, but fortunately never uncomfortably so even when switching back and forth between different modes. We were able to record a surface temperature of about 42 C on the top right corner under unrealistic maximum loads.

Maximum load (Top)
Maximum load (Top)
Maximum load (Bottom)
Maximum load (Bottom)
Max. Load
 33.4 °C
92 F
37.6 °C
100 F
42.4 °C
108 F
 
 32.4 °C
90 F
33.2 °C
92 F
38 °C
100 F
 
 30.4 °C
87 F
31.2 °C
88 F
32.6 °C
91 F
 
Maximum: 42.4 °C = 108 F
Average: 34.6 °C = 94 F
41.8 °C
107 F
37.6 °C
100 F
33.6 °C
92 F
36.2 °C
97 F
35.2 °C
95 F
32.9 °C
91 F
32.6 °C
91 F
32.4 °C
90 F
31.4 °C
89 F
Maximum: 41.8 °C = 107 F
Average: 34.9 °C = 95 F
Power Supply (max.)  38 °C = 100 F | Room Temperature 23 °C = 73 F | Fluke 62 Mini IR Thermometer
(±) The average temperature for the upper side under maximal load is 34.6 °C / 94 F, compared to the average of 30.3 °C / 87 F for the devices in the class Convertible.
(±) The maximum temperature on the upper side is 42.4 °C / 108 F, compared to the average of 35.4 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 41.8 °C / 107 F, compared to the average of 36.5 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 25.6 °C / 78 F, compared to the device average of 30.3 °C / 87 F.
(+) The palmrests and touchpad are reaching skin temperature as a maximum (32.6 °C / 90.7 F) and are therefore not hot.
(-) The average temperature of the palmrest area of similar devices was 28.9 °C / 84 F (-3.7 °C / -6.7 F).

Speakers

The stereo speakers are sufficient for their purpose considering the size of the notebook. That is, there is no static no matter the volume and maximum volume is good enough for the sole user. Bass is weak as expected and lower frequencies are barely reproducible, so earphones are recommended when possible for a better multimedia experience.

Stereo speakers facing downwards adjacent to the battery
Stereo speakers facing downwards adjacent to the battery
Weak bass (Red: Background, Pink: Pink noise, Gray: White noise)
Weak bass (Red: Background, Pink: Pink noise, Gray: White noise)

Energy Management

Power Consumption

The Yoga 900S demands only a few Watts of power when idling. This is similar to competing notebooks with more powerful ULV Core ix processors despite the more efficient Core M CPU. Instead, differences begin to show when the systems are put to stress as the 900S draws only about 17 to 19 W when gaming compared to 30 to 35 W on slightly larger systems like the HP Spectre or XPS 13. This power efficiency has a hand in the system's long battery life.

The power adapter itself is very small (6 x 6 x 3 cm) and also doubles as a USB wall charger. Its rated output of 20 V and 2 A provides 40 W of power to be more than sufficient for the system under high loads.

Lenovo Yoga 900S-12ISK-80ML
HD Graphics 515, 6Y54, Samsung PM951 NVMe MZVLV128
Lenovo ThinkPad Yoga 260 20FD001XGE
HD Graphics 520, 6500U, Samsung SSD PM871 MZNLN256HCHP
HP Spectre 13
HD Graphics 520, 6500U, Samsung PM951 NVMe MZVLV256
Apple MacBook 12 (Early 2016) 1.1 GHz
HD Graphics 515, 6Y30, Apple SSD AP0256
Dell XPS 13 2016 i7 256GB QHD
HD Graphics 520, 6500U, Samsung PM951 NVMe MZ-VLV256D
HP EliteBook Folio G1 V1C37EA
HD Graphics 515, 6Y54, Samsung SM951 MZVPV256 m.2
Power Consumption
-8%
-73%
15%
-54%
-10%
Idle Minimum *
4.8
3.6
25%
8.6
-79%
2.7
44%
6.8
-42%
4.3
10%
Idle Average *
7.2
6.3
12%
11
-53%
2.7
62%
10
-39%
6
17%
Idle Maximum *
7.5
7.6
-1%
11.3
-51%
7.2
4%
10.5
-40%
6.4
15%
Load Average *
17.4
27.2
-56%
33.8
-94%
22
-26%
30.2
-74%
22.7
-30%
Load Maximum *
19.2
22.8
-19%
36.2
-89%
20.5
-7%
33.6
-75%
31.2
-63%

* ... smaller is better

Power Consumption
Off / Standbydarklight 0.28 / 0.32 Watt
Idledarkmidlight 4.8 / 7.2 / 7.5 Watt
Load midlight 17.4 / 19.2 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy

Battery Life

The non-removable 53 Wh battery is quite large for a notebook this size. Combine this with the low-power Core M CPU and fan-less design and you have a very long-lasting system. We clocked in almost 10 hours of constant WLAN use at a brightness setting of 150 nits (75 percent setting), which is very good for a convertible. Lenovo advertises a runtime of 10.5 hours, so our own tests come quite close. In comparison, the MacBook 12 and XPS 13 lasted for one to two hours shorter under similar WLAN conditions. Users can still expect at least 3.5 hours of heavy use and on maximum display brightness.

Recharging from near zero to full capacity will take roughly 2 to 2.5 hours.

Maximum runtime (Reader's Test)
Maximum runtime (Reader's Test)
Minimum runtime (Classic Test)
Minimum runtime (Classic Test)
WLAN runtime
WLAN runtime
Lenovo Yoga 900S-12ISK-80ML
53 Wh
Lenovo ThinkPad Yoga 260 20FD001XGE
44 Wh
HP Spectre 13
38 Wh
Apple MacBook 12 (Early 2016) 1.1 GHz
41 Wh
Dell XPS 13-9350
56 Wh
Lenovo ThinkPad X1 Tablet
37 Wh
Battery Runtime
-31%
-42%
-5%
-23%
-41%
Reader / Idle
894
943
5%
715
-20%
782
-13%
628
-30%
WiFi v1.3
582
346
-41%
338
-42%
501
-14%
451
-23%
300
-48%
Load
219
92
-58%
78
-64%
231
5%
150
-32%
118
-46%
Battery Runtime
Idle (without WLAN, min brightness)
14h 54min
NBC WiFi Websurfing Battery Test 1.3
9h 42min
Load (maximum brightness)
3h 39min

Pros

+ high quality glossy touchscreen; 1080p and 1440p options
+ very long battery life; high capacity battery
+ small and portable; only 1 kg in weight
+ accessible internals; upgradeable SSD
+ good build quality
+ completely silent
+ USB Type-C port

Cons

- average NVMe SSD performance
- no SD reader or WWAN options
- unimpressive stereo speakers
- CPU and GPU throttling
- very shallow key travel
- pricey

Verdict

In review: Lenovo Yoga 900S 12ISK. Test model provided by Lenovo US
In review: Lenovo Yoga 900S 12ISK. Test model provided by Lenovo US

It's hard to not like the Yoga 900S at first glance. It's attractive, silent, long-lasting, and incredibly easy to pick up and play when indoors or on-the-go. Workmanship and quality are solid and worthy of the flagship Yoga 900 name. In this sense, it's one of the most accessible and hassle-free convertibles available.

The main drawbacks preventing us from giving a full recommendation are its keyboard and throttling performance. Results from benchmarks and games reveal that owners will not be getting the full performance out of the CPU when compared to systems with the same Intel processor and graphics. Users who intend to do no more than word processing, browsing, and video playback will likely not notice, but we do feel that users should have access to every bit of processing power possible especially when considering that raw performance from a Core m series CPU is already quite limited. Meanwhile, the keyboard can feel far too shallow and soft for users accustomed to desktop setups or even when compared to most Ultrabooks currently available.

Otherwise, there's little else to complain about the system. The lack of a dedicated video-out port, built-in stylus, SD reader, and Thunderbolt 3 port are somewhat smaller nitpicks. Extra features like NFC or GPS would have made the system even more versatile. As it stands, however, the $1000+ Yoga 900S is about as pricey as some more powerful and popular Ultrabooks like the XPS 13, ZenBook UX303, or Spectre, so readers who are considering the Lenovo will have to see tremendous benefits in its touchscreen and 360-degree hinge over said alternatives.

Lenovo Yoga 900S-12ISK-80ML - 06/19/2016 v5.1(old)
Allen Ngo

Chassis
89 / 98 → 91%
Keyboard
62%
Pointing Device
78%
Connectivity
27 / 80 → 34%
Weight
75 / 35-78 → 93%
Battery
92%
Display
86%
Games Performance
51 / 68 → 76%
Application Performance
70 / 87 → 80%
Temperature
91%
Noise
100%
Audio
30 / 91 → 33%
Camera
53 / 85 → 62%
Average
70%
82%
Convertible - Weighted Average

Pricecompare

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> Notebook / Laptop Reviews and News > Reviews > Lenovo Yoga 900S 12ISK Convertible Review
Allen Ngo, 2016-06-19 (Update: 2016-06-23)
Allen Ngo
Allen Ngo - US Editor in Chief
After graduating with a B.S. in environmental hydrodynamics from the University of California, I studied reactor physics to become licensed by the U.S. NRC to operate nuclear reactors. There's a striking level of appreciation you gain for everyday consumer electronics after working with modern nuclear reactivity systems astonishingly powered by computers from the 80s. When I'm not managing day-to-day activities and US review articles on Notebookcheck, you can catch me following the eSports scene and the latest gaming news.