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Lenovo IdeaPad S540-13API Laptop in Review: Slim Ryzen Companion with Long Battery Life

High TDP with Ryzen 5 3550H. While the Lenovo IdeaPad S540 does not take any new steps when it comes to the design, it is equipped with the AMD Ryzen 5 3550H, which is supposed to offer better long-term performance. Combined with a big battery, the 13.3-inch laptop looks like a promising companion for longer work days. In this review, we will determine what else the small bundle of energy is capable of.
Mike Wobker, 👁 Andreas Osthoff (translated by Marius S.),
Lenovo IdeaPad S540-13API

Lenovo's IdeaPad series laptop come in various configurations and display sizes. We recently reviewed the Lenovo IdeaPad S540-15IWL, for example, which is equipped with a 15.6-inch screen and Intel hardware. Its build quality and performance were solid overall. The display left something to be desired, however. Furthermore, the AMD variant came out ahead in a direct comparison.

Our test model of the IdeaPad S540-13API is AMD-based as well. A Ryzen 5 3550H and 16 GB of RAM make for a responsive system. Additionally, the integrated graphics unit AMD Radeon RX Vega 8 and a 512-GB SSD are built-in. For less than $1,000, the included hardware is decent and able to compete against the competitors listed below. Underneath every table, additional laptops from our database can be added for comparison.

Lenovo IdeaPad S540-13API (Ideapad S540 Series)
Processor
AMD Ryzen 5 3550H 4 x 2.1 - 3.7 GHz, Zen+
Memory
16384 MB 
, Dual-channel
Display
13.30 inch 16:10, 2560 x 1600 pixel 227 PPI, CSOT T3 MND307DA1-2, IPS, glossy: yes
Mainboard
AMD Promontory/Bixby FCH
Storage
Samsung SSD PM981 MZVLB512HAJQ, 512 GB 
, 438 GB free
Soundcard
AMD Raven - Audio Processor - HD Audio Controller
Connections
3 USB 3.0 / 3.1 Gen1, Audio Connections: combined 3.5 mm audio jack
Networking
Atheros/Qualcomm QCA6174 (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5), Bluetooth 5
Size
height x width x depth (in mm): 16 x 296.9 x 208.6 ( = 0.63 x 11.69 x 8.21 in)
Battery
56 Wh Lithium-Ion
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 0.9 MP, 16:9 (1280x720)
Additional features
Speakers: 2x 2 W stereo speakers, Keyboard: chiclet, Keyboard Light: yes, McAffee, 24 Months Warranty
Weight
1.278 kg ( = 45.08 oz / 2.82 pounds), Power Supply: 352 g ( = 12.42 oz / 0.78 pounds)
Price
850 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Rating
Date
Model
Weight
Height
Size
Resolution
Best Price
85 %
12/2019
Lenovo IdeaPad S540-13API
R5 3550H, Vega 8
1.3 kg16 mm13.30"2560x1600
84 %
11/2019
Acer TravelMate X514-51-511Q
i5-8265U, UHD Graphics 620
980 g15 mm14.00"1920x1080
86 %
07/2019
Lenovo ThinkBook 13s-20R90071GE
i5-8265U, UHD Graphics 620
1.3 kg15.9 mm13.30"1920x1080
83 %
11/2019
Acer Swift 3 SF314-41-R8HZ
R5 3500U, Vega 8
1.5 kg18 mm14.00"1920x1080
84 %
09/2019
Asus VivoBook 14 X403FA
i5-8265U, UHD Graphics 620
1.3 kg16.5 mm14.00"1920x1080

Case & Connectivity - Robust Aluminum and Poor Serviceability

Serviceability
Serviceability

In terms of the design, Lenovo has opted for a subtle look that does not look cheap thanks to the matte aluminum surfaces. The compact system is well-built and there are no uneven clearances or similar flaws. The hinge can be opened to a maximum angle of about 140 degrees and firmly holds the display in place. The speakers are located on the bottom of the slightly angled front edge of the laptop. The bottom plate can be easily removed after all of the screws have been loosened. Subsequently, users have access to the fans, SSD and the Wi-Fi module. However, swapping or upgrading the RAM is not possible.

The IdeaPad S540-13API does not offer a very wide port selection and there is, for example, no HDMI port. With an appropriate adapter, an external display can still be connected via the two USB-C ports, both of which can also be used to charge the ultra-mobile laptop. As for wireless connectivity, Bluetooth 5.0 and Wi-Fi 6 with the fast 802.11ac standard are available. Despite the integrated 2x2-MIMO antenna, we only measured average transfer rates of 501 MB/s for receiving and a fairly mediocre 447 MB/s when sending data in our Wi-Fi test.

Lenovo IdeaPad S540-13API
Lenovo IdeaPad S540-13API
Lenovo IdeaPad S540-13API
Lenovo IdeaPad S540-13API
Lenovo IdeaPad S540-13API
Lenovo IdeaPad S540-13API

Size Comparison

329 mm / 13 inch 228 mm / 8.98 inch 15 mm / 0.591 inch 980 g2.16 lbs323 mm / 12.7 inch 228 mm / 8.98 inch 18 mm / 0.709 inch 1.5 kg3.31 lbs323 mm / 12.7 inch 208 mm / 8.19 inch 16.5 mm / 0.65 inch 1.3 kg2.91 lbs307.6 mm / 12.1 inch 216 mm / 8.5 inch 15.9 mm / 0.626 inch 1.3 kg2.94 lbs296.9 mm / 11.7 inch 208.6 mm / 8.21 inch 16 mm / 0.63 inch 1.3 kg2.82 lbs

Connectivity

Left: 2x USB 3.1 (Type-C)
Left: 2x USB 3.1 (Type-C)
Right: Power button, combined audio jack, 1x USB 3.1 (Type-A)
Right: Power button, combined audio jack, 1x USB 3.1 (Type-A)
Networking
iperf3 Client (receive) TCP 1 m 4M x10
Lenovo ThinkBook 13s-20R90071GE
Intel Wireless-AC 9560
648 MBit/s ∼100% +29%
Asus VivoBook 14 X403FA
Intel Wireless-AC 9560
635 MBit/s ∼98% +27%
Lenovo IdeaPad S540-13API
Atheros/Qualcomm QCA6174
501 (257min - 533max) MBit/s ∼77%
Acer TravelMate X514-51-511Q
Intel Wireless-AC 9560
469 (256min - 561max) MBit/s ∼72% -6%
Acer Swift 3 SF314-41-R8HZ
Atheros/Qualcomm QCA6174
450 (234min - 544max) MBit/s ∼69% -10%
iperf3 Client (transmit) TCP 1 m 4M x10
Lenovo ThinkBook 13s-20R90071GE
Intel Wireless-AC 9560
658 MBit/s ∼100% +47%
Acer TravelMate X514-51-511Q
Intel Wireless-AC 9560
649 (588min - 677max) MBit/s ∼99% +45%
Asus VivoBook 14 X403FA
Intel Wireless-AC 9560
629 MBit/s ∼96% +41%
Acer Swift 3 SF314-41-R8HZ
Atheros/Qualcomm QCA6174
558 (428min - 613max) MBit/s ∼85% +25%
Lenovo IdeaPad S540-13API
Atheros/Qualcomm QCA6174
447 (247min - 510max) MBit/s ∼68%
0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380390400410420430440450460470480490500510520530540Tooltip
; iperf3 Client (receive) TCP 1 m 4M x10; iperf 3.1.3: Ø493 (257-533)
; iperf3 Client (transmit) TCP 1 m 4M x10; iperf 3.1.3: Ø438 (247-510)

Input Devices - Good Lenovo Keyboard with Somewhat Small Keys

The keyboard of the Lenovo IdeaPad S540 is well-suited to larger typing tasks. It has a good feedback and a slightly spongy actuation point. For large hands, the keys may be slightly too small, particularly since there is not a lot of space between the keys. Our test model also has a two-stage white backlight, which can be adjusted according to your own preferences.

A ClickPad serves as the mouse substitute. The surface is very smooth and allows for precisely navigating the system. The touchpad responds well to clicks by tapping. Slight pressure on the bottom edge results in a left or right click that is confirmed by a soft acoustic feedback.

Input Devices
Input Devices
Backlight
Backlight

Display - IdeaPad S540-13API with Glossy Screen

Subpixel array
Subpixel array

The display of the Lenovo IdeaPad S540 is based on a 13.3-inch IPS panel with a native resolution of 2,560x1,600 pixels. Since the display is glossy, strong reflections are inevitable. At 314 cd/m², the average brightness is sufficiently high and is the highest value in our comparison. Similarly, our test model places first in terms of illumination with its very good result of 94 percent. Our measurements were also able to confirm that PWM is not being used to control the brightness level.

Lenovo does not offer other display options for the IdeaPad S540.

320
cd/m²
316
cd/m²
319
cd/m²
302
cd/m²
321
cd/m²
315
cd/m²
307
cd/m²
313
cd/m²
315
cd/m²
Distribution of brightness
CSOT T3 MND307DA1-2
X-Rite i1Pro 2
Maximum: 321 cd/m² Average: 314.2 cd/m² Minimum: 3.2 cd/m²
Brightness Distribution: 94 %
Center on Battery: 322 cd/m²
Contrast: 1689:1 (Black: 0.19 cd/m²)
ΔE Color 3.3 | 0.6-29.43 Ø5.7, calibrated: 1.7
ΔE Greyscale 3.5 | 0.64-98 Ø5.9
98.4% sRGB (Argyll 3D) 64.5% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.08
Lenovo IdeaPad S540-13API
CSOT T3 MND307DA1-2, IPS, 2560x1600, 13.30
Acer TravelMate X514-51-511Q
Chi mei CMN14D5, IPS, 1920x1080, 14.00
Lenovo ThinkBook 13s-20R90071GE
N133HCE-EN2, a-Si IPS LED, 1920x1080, 13.30
Acer Swift 3 SF314-41-R8HZ
Chi Mei N140HCA-EAC, IPS, 1920x1080, 14.00
Asus VivoBook 14 X403FA
Chi Mei N140HCA-EAC, IPS, 1920x1080, 14.00
Response Times
12%
9%
15%
12%
Response Time Grey 50% / Grey 80% *
45.6 (21.6, 24)
40 (21, 19)
12%
40.4 (22, 18.4)
11%
38 (20, 18)
17%
40.8 (22.8, 18)
11%
Response Time Black / White *
30.8 (16.8, 14)
27 (16, 11)
12%
28.8 (15.6, 13.2)
6%
27 (16, 11)
12%
27.2 (16.4, 10.8)
12%
PWM Frequency
250 (10)
25000 (20)
250 (10)
24510 (20)
Screen
-4%
-1%
-53%
-59%
Brightness middle
321
295
-8%
319
-1%
233
-27%
250
-22%
Brightness
314
276
-12%
309
-2%
219
-30%
236
-25%
Brightness Distribution
94
82
-13%
92
-2%
75
-20%
78
-17%
Black Level *
0.19
0.215
-13%
0.28
-47%
0.14
26%
0.27
-42%
Contrast
1689
1372
-19%
1139
-33%
1664
-1%
926
-45%
Colorchecker DeltaE2000 *
3.3
2.6
21%
2.4
27%
5.9
-79%
5
-52%
Colorchecker DeltaE2000 max. *
6
5.6
7%
6.3
-5%
22.8
-280%
20.7
-245%
Colorchecker DeltaE2000 calibrated *
1.7
0.6
65%
4.3
-153%
Greyscale DeltaE2000 *
3.5
3.4
3%
3.8
-9%
4.8
-37%
2.4
31%
Gamma
2.08 106%
2.08 106%
2.16 102%
2.06 107%
2.05 107%
CCT
7245 90%
7192 90%
7335 89%
6589 99%
6697 97%
Color Space (Percent of AdobeRGB 1998)
64.5
63
-2%
63.5
-2%
39
-40%
38.9
-40%
Color Space (Percent of sRGB)
98.4
99
1%
99.1
1%
62
-37%
61
-38%
Total Average (Program / Settings)
4% / -1%
4% / 1%
-19% / -41%
-24% / -48%

* ... smaller is better

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
30.8 ms ... rise ↗ and fall ↘ combined↗ 16.8 ms rise
↘ 14 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 78 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (24.3 ms).
       Response Time 50% Grey to 80% Grey
45.6 ms ... rise ↗ and fall ↘ combined↗ 21.6 ms rise
↘ 24 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 636 (maximum) ms. » 71 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (38.6 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 not detected

In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 9589 (minimum: 5 - maximum: 142900) Hz was measured.

Color space coverage (sRGB) - 98.4 percent
Color space coverage (sRGB) - 98.4 percent
Color space coverage (AdobeRGB) - 64.5 percent
Color space coverage (AdobeRGB) - 64.5 percent

Our measurements reveal the IdeaPad S540-13API's good contrast ratio of 1,689:1 and a very good black value of only 0.19 cd/m². As a result, colors are distinct from one another and black areas appear deep and rich. With a color space coverage of 98.4 percent (sRGB) and 64.5 percent (AdobeRGB), the display of the Lenovo laptop does not have to shy away from the competition either.

Furthermore, the CalMan analysis shows the display to be very color accurate with an only slightly increased blue portion ex-factory. However, our calibration attempt results in an even more accurate display. Our ICC profile is linked above next to the display illumination graphic.

Due to the glossy display, the IdeaPad S540 is not well-suited for outdoor use. On cloudy days, the display shows reflections of objects in the environment even under shade. Consequentially, users should remain indoors with the laptop - at the very least during summer. The installed IPS panel has very good viewing angles, which prevent the screen's content and its colors from becoming distorted.

CalMAN - Color accuracy
CalMAN - Color accuracy
CalMAN - Saturation sweeps
CalMAN - Saturation sweeps
CalMAN - Grayscale
CalMAN - Grayscale
CalMAN - Color accuracy (calibrated)
CalMAN - Color accuracy (calibrated)
CalMAN - Saturation sweeps (calibrated)
CalMAN - Saturation sweeps (calibrated)
CalMAN - Grayscale (calibrated)
CalMAN - Grayscale (calibrated)
Outdoor use
Outdoor use
Backlight bleeding
Backlight bleeding
Viewing angles
Viewing angles

Performance - Higher Continuous Performance Thanks to Ryzen 5 3550H

LatencyMon
LatencyMon

Lenovo has equipped our IdeaPad S540-13API test device with an AMD Ryzen 5 3550H, which comes with an integrated Radeon RX Vega 8 graphics unit, as well as 16 GB of RAM and a 512-GB SSD. Thus, the small laptop is suitable for various office tasks and more than capable of completing simple image editing tasks. While 16 GB of RAM is already the maximum amount of system memory that can be configured, users may also equip the IdeaPad S540 with a Ryzen 7 APU and up to a 1-TB SSD.

Lenovo's Vantage app allows for selecting energy settings that are independent from Windows. All benchmarks were performed using the "intelligent cooling" profile. When enabling the "high performance" profile, the benchmarks produce similar results and the only difference was that there was some quiet fan noise even while idling.

Processor

The AMD Ryzen 5 3550H is a four-core CPU that is able to process up to 8 threads simultaneously. While the architecture it is based on is similar to that of the AMD Ryzen 5 3500U, it has a higher TDP of 35 watts instead of just 18 watts. This hints at a better long-term performance, although the performance level ultimately depends on the effectiveness of the cooling solution. With a base clock of 2.1 GHz and a Turbo Boost frequency of 3.7 GHz, the clock speeds are identical to the Ryzen 5 3500U.

In our Cinebench R15 loop test, the AMD Ryzen 5 3550H's initial peak results are not unlike those of the Acer Swift 3 SF314, although here, the performance decreases by only 7 percent over time. Thus, users can indeed expect a higher performance than with the Ryzen 5 3500U over longer periods of time.

0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380390400410420430440450460470480490500510520530540550560570580590600610620630640650660Tooltip
Lenovo IdeaPad S540-13API AMD Ryzen 5 3550H, AMD Ryzen 5 3550H: Ø602 (591.24-642.46)
Acer TravelMate X514-51-511Q Intel Core i5-8265U, Intel Core i5-8265U: Ø462 (454.47-500.69)
Lenovo ThinkBook 13s-20R90071GE Intel Core i5-8265U, Intel Core i5-8265U: Ø557 (546-655)
Acer Swift 3 SF314-41-R8HZ AMD Ryzen 5 3500U, AMD Ryzen 5 3500U: Ø549 (530.85-646.18)
Asus VivoBook 14 X403FA Intel Core i5-8265U, Intel Core i5-8265U: Ø538 (531.69-621.96)

In our individual Cinebench R15 tests, the Lenovo IdeaPad S540-13API only achieves average results. While the laptop only places second to last in our comparison when it comes to the single-core test, the result is still above average compared to other devices with the same CPU. The multi-core score is only slightly lower than that of the Ryzen 5 3500U inside the Acer Swift 3 SF314. In other laptops, the Ryzen 5 3550H achieves up to 13 percent better results.

In battery mode, the IdeaPad S540 reaches a Cinebench R15 multi-core score of 570 points.

Cinebench R15
CPU Single 64Bit
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U
162 Points ∼60% +13%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U
162 Points ∼60% +13%
Asus VivoBook 14 X403FA
Intel Core i5-8265U
152 Points ∼56% +6%
Acer Swift 3 SF314-41-R8HZ
AMD Ryzen 5 3500U
145 Points ∼53% +1%
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H
143 Points ∼53%
Average AMD Ryzen 5 3550H
  (77 - 146, n=10)
137 Points ∼50% -4%
Average of class Subnotebook
  (20 - 219, n=342)
124 Points ∼46% -13%
CPU Multi 64Bit
Average AMD Ryzen 5 3550H
  (635 - 769, n=10)
724 Points ∼16% +14%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U
655 (546min - 658max) Points ∼15% +3%
Acer Swift 3 SF314-41-R8HZ
AMD Ryzen 5 3500U
646 Points ∼14% +2%
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H
635 (587.92min - 641.25max) Points ∼14%
Asus VivoBook 14 X403FA
Intel Core i5-8265U
622 Points ∼14% -2%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U
501 Points ∼11% -21%
Average of class Subnotebook
  (32 - 1626, n=357)
411 Points ∼9% -35%
Cinebench R15 CPU Multi 64Bit
635 Points
Cinebench R15 OpenGL 64Bit
49.72 fps
Cinebench R15 Ref. Match 64Bit
98 %
Cinebench R15 CPU Single 64Bit
143 Points
Help

System Performance

In our PCMark 10 test, which evaluates system performance, the Lenovo Legion S540-13API claims first place overall. However, it tends to fall behind slightly compared to the Acer Swift 3 SF314-41 in individual disciplines. Daily use is a breeze with the small 13-inch laptop. There is no stuttering and both the operating system as well as applications load quickly.

More comparisons and the test results of other laptops can be found on our dedicated CPU benchmark page.

PCMark 10
Digital Content Creation
Average AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (3763 - 3947, n=3)
3848 Points ∼26% +2%
Lenovo IdeaPad S540-13API
Vega 8, R5 3550H, Samsung SSD PM981 MZVLB512HAJQ
3763 Points ∼26%
Acer Swift 3 SF314-41-R8HZ
Vega 8, R5 3500U, WDC PC SN520 SDAPNUW-512G
3453 Points ∼24% -8%
Lenovo ThinkBook 13s-20R90071GE
UHD Graphics 620, i5-8265U, SK hynix BC501 HFM512GDHTNG-8310A
3058 Points ∼21% -19%
Asus VivoBook 14 X403FA
UHD Graphics 620, i5-8265U, Intel SSD 660p SSDPEKNW512G8
3050 Points ∼21% -19%
Average of class Subnotebook
  (405 - 5795, n=153)
2813 Points ∼19% -25%
Acer TravelMate X514-51-511Q
UHD Graphics 620, i5-8265U, Kingston RBUSNS8154P3256GJ1
2795 Points ∼19% -26%
Productivity
Acer TravelMate X514-51-511Q
UHD Graphics 620, i5-8265U, Kingston RBUSNS8154P3256GJ1
6382 Points ∼57% +6%
Average AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (5995 - 6420, n=3)
6273 Points ∼56% +5%
Lenovo IdeaPad S540-13API
Vega 8, R5 3550H, Samsung SSD PM981 MZVLB512HAJQ
5995 Points ∼54%
Acer Swift 3 SF314-41-R8HZ
Vega 8, R5 3500U, WDC PC SN520 SDAPNUW-512G
5952 Points ∼53% -1%
Asus VivoBook 14 X403FA
UHD Graphics 620, i5-8265U, Intel SSD 660p SSDPEKNW512G8
5898 Points ∼53% -2%
Lenovo ThinkBook 13s-20R90071GE
UHD Graphics 620, i5-8265U, SK hynix BC501 HFM512GDHTNG-8310A
5836 Points ∼52% -3%
Average of class Subnotebook
  (1014 - 8682, n=153)
5538 Points ∼50% -8%
Essentials
Average AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (7872 - 8579, n=3)
8342 Points ∼73% +6%
Acer Swift 3 SF314-41-R8HZ
Vega 8, R5 3500U, WDC PC SN520 SDAPNUW-512G
7877 Points ∼69% 0%
Lenovo IdeaPad S540-13API
Vega 8, R5 3550H, Samsung SSD PM981 MZVLB512HAJQ
7872 Points ∼69%
Acer TravelMate X514-51-511Q
UHD Graphics 620, i5-8265U, Kingston RBUSNS8154P3256GJ1
7867 Points ∼69% 0%
Asus VivoBook 14 X403FA
UHD Graphics 620, i5-8265U, Intel SSD 660p SSDPEKNW512G8
7595 Points ∼66% -4%
Lenovo ThinkBook 13s-20R90071GE
UHD Graphics 620, i5-8265U, SK hynix BC501 HFM512GDHTNG-8310A
7278 Points ∼64% -8%
Average of class Subnotebook
  (2062 - 10113, n=153)
7270 Points ∼63% -8%
Score
Average AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (4029 - 4307, n=3)
4202 Points ∼48% +4%
Lenovo IdeaPad S540-13API
Vega 8, R5 3550H, Samsung SSD PM981 MZVLB512HAJQ
4029 Points ∼46%
Acer Swift 3 SF314-41-R8HZ
Vega 8, R5 3500U, WDC PC SN520 SDAPNUW-512G
3907 Points ∼45% -3%
Acer TravelMate X514-51-511Q
UHD Graphics 620, i5-8265U, Kingston RBUSNS8154P3256GJ1
3725 Points ∼42% -8%
Asus VivoBook 14 X403FA
UHD Graphics 620, i5-8265U, Intel SSD 660p SSDPEKNW512G8
3692 Points ∼42% -8%
Lenovo ThinkBook 13s-20R90071GE
UHD Graphics 620, i5-8265U, SK hynix BC501 HFM512GDHTNG-8310A
3630 Points ∼41% -10%
Average of class Subnotebook
  (743 - 5549, n=156)
3430 Points ∼39% -15%

Storage Solution

Lenovo has installed a 512-GB Samsung SSD in our test model. In our benchmarks, it achieves very fast read and write speeds and places first in our comparison. In practice, the good scores also result in very low access times and no noticeable delays.

The test results of other storage solutions can be found in our HDD/SSD table.

Lenovo IdeaPad S540-13API
Samsung SSD PM981 MZVLB512HAJQ
Acer TravelMate X514-51-511Q
Kingston RBUSNS8154P3256GJ1
Lenovo ThinkBook 13s-20R90071GE
SK hynix BC501 HFM512GDHTNG-8310A
Acer Swift 3 SF314-41-R8HZ
WDC PC SN520 SDAPNUW-512G
Asus VivoBook 14 X403FA
Intel SSD 660p SSDPEKNW512G8
Average Samsung SSD PM981 MZVLB512HAJQ
 
Average of class Subnotebook
 
CrystalDiskMark 5.2 / 6
-19%
-29%
-25%
-19%
-4%
-21%
Write 4K
133.9
122.3
-9%
89.33
-33%
134.3
0%
130.8
-2%
127 (90.4 - 176, n=64)
-5%
104 (3.23 - 196, n=158)
-22%
Read 4K
44.98
45.51
1%
37.4
-17%
43.56
-3%
55.09
22%
44 (28 - 61.3, n=63)
-2%
60.3 (5.37 - 3738, n=158)
34%
Write Seq
2730
667.1
-76%
608.2
-78%
1434
-47%
962.4
-65%
1617 (112 - 2730, n=62)
-41%
1034 (37.3 - 2811, n=157)
-62%
Read Seq
2403
713
-70%
1019
-58%
1448
-40%
1634
-32%
1716 (501 - 2665, n=62)
-29%
1270 (142 - 2760, n=157)
-47%
Write 4K Q32T1
252.2
411.8
63%
487.9
93%
239.1
-5%
343.5
36%
413 (198 - 1707, n=64)
64%
311 (3.6 - 868, n=158)
23%
Read 4K Q32T1
335.6
559.3
67%
284.8
-15%
327.6
-2%
339.7
1%
420 (230 - 1015, n=64)
25%
348 (9.66 - 1580, n=158)
4%
Write Seq Q32T1
2983
891.8
-70%
872.1
-71%
1456
-51%
984.2
-67%
2076 (1714 - 2994, n=64)
-30%
1223 (16.7 - 3018, n=158)
-59%
Read Seq Q32T1
3535
1639
-54%
1635
-54%
1734
-51%
1858
-47%
3130 (1772 - 3565, n=64)
-11%
2056 (113 - 3569, n=158)
-42%
Write 4K Q8T8
387.3
1264 (369 - 1814, n=13)
626 (12.4 - 1283, n=16)
Read 4K Q8T8
756.6
1193 (527 - 1620, n=13)
665 (31.7 - 1172, n=16)
AS SSD
-29%
-25%
-21%
-29%
-9%
-300%
Copy Game MB/s
374.15
508.96
801.58
1057 (547 - 1639, n=43)
357 (10.9 - 1584, n=274)
Copy Program MB/s
292.16
205.17
309.88
454 (205 - 828, n=43)
197 (8.56 - 730, n=274)
Copy ISO MB/s
943.09
801.96
1406.15
1755 (917 - 3259, n=43)
546 (10.1 - 2761, n=281)
Score Total
4054
2411
-41%
2234
-45%
2981
-26%
1863
-54%
3966 (2348 - 5316, n=62)
-2%
1563 (28 - 5191, n=306)
-61%
Score Write
1814
796
-56%
843
-54%
1178
-35%
1056
-42%
1780 (147 - 2992, n=62)
-2%
582 (8 - 2379, n=306)
-68%
Score Read
1486
1073
-28%
939
-37%
1193
-20%
543
-63%
1451 (752 - 2125, n=62)
-2%
657 (12 - 2339, n=306)
-56%
Access Time Write *
0.043
0.044
-2%
0.031
28%
0.042
2%
0.045
-5%
0.0834 (0.025 - 2.52, n=62)
-94%
0.776 (0.021 - 30.3, n=369)
-1705%
Access Time Read *
0.069
0.046
33%
0.062
10%
0.086
-25%
0.0509 (0.029 - 0.103, n=62)
26%
0.805 (0.04 - 23, n=362)
-1067%
4K-64 Write
1467.66
603.72
-59%
671.71
-54%
956.22
-35%
813.78
-45%
1505 (96.2 - 2716, n=62)
3%
371 (0.22 - 2105, n=379)
-75%
4K-64 Read
1159.31
896.38
-23%
772.2
-33%
1008.06
-13%
322.94
-72%
1203 (530 - 1823, n=62)
4%
451 (0.41 - 2011, n=379)
-61%
4K Write
89.51
114.43
28%
119.08
33%
85.96
-4%
152.01
70%
112 (1.76 - 146, n=62)
25%
69.6 (0.2 - 189, n=379)
-22%
4K Read
47.14
54.84
16%
40.31
-14%
38.06
-19%
56.64
20%
50.5 (31.7 - 61, n=62)
7%
27.9 (0.35 - 63.8, n=379)
-41%
Seq Write
2564.3
774.82
-70%
517.69
-80%
1360.36
-47%
905.56
-65%
1637 (487 - 2564, n=62)
-36%
590 (14 - 2564, n=380)
-77%
Seq Read
2791.8
1222.37
-56%
1264.37
-55%
1466.49
-47%
1633.12
-42%
1975 (1030 - 2806, n=62)
-29%
959 (50.5 - 2980, n=380)
-66%
Total Average (Program / Settings)
-24% / -24%
-27% / -27%
-23% / -23%
-24% / -25%
-7% / -7%
-161% / -183%

* ... smaller is better

Samsung SSD PM981 MZVLB512HAJQ
CDM 5/6 Read Seq Q32T1: 3535 MB/s
CDM 5/6 Write Seq Q32T1: 2983 MB/s
CDM 5/6 Read 4K Q32T1: 335.6 MB/s
CDM 5/6 Write 4K Q32T1: 252.2 MB/s
CDM 5 Read Seq: 2403 MB/s
CDM 5 Write Seq: 2730 MB/s
CDM 5/6 Read 4K: 44.98 MB/s
CDM 5/6 Write 4K: 133.9 MB/s

GPU Performance

The integrated graphics unit AMD Radeon RX Vega 8 is responsible for displaying screen contents on the IdeaPad S540. This GPU achieves the best 3DMark results out of all competing laptops we chose for our comparison. Since the performance of the RX Vega 8 is heavily dependent on the system memory, our Lenovo laptop particularly benefits from the 16 GB of RAM running in dual-channel mode. Due to this, users who choose lower-end memory configurations have to expect a lower GPU performance as well.

Consult our GPU benchmark list to find out how other graphics cards stack up against the AMD Radeon RX Vega 8 in our test device.

3DMark 11 - 1280x720 Performance GPU
Lenovo IdeaPad S540-13API
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 3550H
4164 Points ∼100%
Acer Swift 3 SF314-41-R8HZ
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 3500U
3949 Points ∼95% -5%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (1668 - 4317, n=39)
3420 Points ∼82% -18%
Asus VivoBook 14 X403FA
Intel UHD Graphics 620, Intel Core i5-8265U
1845 Points ∼44% -56%
Lenovo ThinkBook 13s-20R90071GE
Intel UHD Graphics 620, Intel Core i5-8265U
1759 Points ∼42% -58%
Acer TravelMate X514-51-511Q
Intel UHD Graphics 620, Intel Core i5-8265U
1740 Points ∼42% -58%
Average of class Subnotebook
  (230 - 12199, n=424)
1617 Points ∼39% -61%
3DMark - 1920x1080 Fire Strike Score
Lenovo IdeaPad S540-13API
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 3550H
2375 Points ∼100%
Acer Swift 3 SF314-41-R8HZ
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 3500U
2146 Points ∼90% -10%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (985 - 2645, n=36)
1995 Points ∼84% -16%
Average of class Subnotebook
  (208 - 7996, n=311)
1203 Points ∼51% -49%
Asus VivoBook 14 X403FA
Intel UHD Graphics 620, Intel Core i5-8265U
1164 Points ∼49% -51%
Acer TravelMate X514-51-511Q
Intel UHD Graphics 620, Intel Core i5-8265U
1035 Points ∼44% -56%
Lenovo ThinkBook 13s-20R90071GE
Intel UHD Graphics 620, Intel Core i5-8265U
1018 Points ∼43% -57%
3DMark 11 Performance
4234 points
3DMark Fire Strike Score
2375 points
Help

Gaming Performance

The gaming performance of the installed AMD Radeon RX Vega 8 heavily depends on the memory configuration. With 16 GB of dual-channel RAM, many titles are at least playable in HD quality, whereas older games can even be played at Full HD. The titles we tested ran well with the appropriate settings.

More information on the performance of AMD's Radeon RX Vega 8 can be found in our GPU gaming tests.

BioShock Infinite - 1920x1080 Ultra Preset, DX11 (DDOF)
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
21.15 fps ∼100%
Acer Swift 3 SF314-41-R8HZ
AMD Ryzen 5 3500U, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
18.4 fps ∼87% -13%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (7.6 - 28, n=30)
17.6 fps ∼83% -17%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
15.3 fps ∼72% -28%
Average of class Subnotebook
  (2.8 - 70.3, n=157)
12 fps ∼57% -43%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U, Intel UHD Graphics 620
8.98 fps ∼42% -58%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
8 fps ∼38% -62%
Dota 2 Reborn
1920x1080 ultra (3/3) best looking
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
38.5 (35.8min) fps ∼100%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (24.7 - 44.8, n=24)
33.4 fps ∼87% -13%
Average of class Subnotebook
  (5.5 - 110, n=74)
31 fps ∼81% -19%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
19.2 (17.8min) fps ∼50% -50%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U, Intel UHD Graphics 620
17.7 (16.7min) fps ∼46% -54%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
16.9 (15.9min) fps ∼44% -56%
1920x1080 high (2/3)
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
41.2 (37.9min) fps ∼100%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (26.9 - 47.8, n=24)
36.2 fps ∼88% -12%
Average of class Subnotebook
  (6 - 121, n=74)
34 fps ∼83% -17%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
21.5 (19.9min) fps ∼52% -48%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U, Intel UHD Graphics 620
20 (18.8min) fps ∼49% -51%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
19.2 (17.8min) fps ∼47% -53%
1366x768 med (1/3)
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
66 (60.2min) fps ∼100%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (46.8 - 76.3, n=24)
59.5 fps ∼90% -10%
Average of class Subnotebook
  (14.3 - 129, n=76)
55 fps ∼83% -17%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
47.4 (42.8min) fps ∼72% -28%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U, Intel UHD Graphics 620
46.7 (42.4min) fps ∼71% -29%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
42.9 (38.5min) fps ∼65% -35%
1280x720 min (0/3) fastest
Average of class Subnotebook
  (15.9 - 147, n=76)
75.8 fps ∼100% +1%
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
75 (64.4min) fps ∼99%
Acer TravelMate X514-51-511Q
Intel Core i5-8265U, Intel UHD Graphics 620
73.9 (65.2min) fps ∼97% -1%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
72 (64.3min) fps ∼95% -4%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
71 (62.7min) fps ∼94% -5%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (56.2 - 97.2, n=24)
70.5 fps ∼93% -6%
X-Plane 11.11
1920x1080 high (fps_test=3)
Average of class Subnotebook
  (3.09 - 72.3, n=60)
21.3 fps ∼100% +25%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (14.4 - 27.3, n=20)
18.2 fps ∼85% +6%
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
17.1 fps ∼80%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
16.7 fps ∼78% -2%
1920x1080 med (fps_test=2)
Average of class Subnotebook
  (3.42 - 87.5, n=63)
23.3 fps ∼100% +19%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (14.5 - 31, n=21)
20.3 fps ∼87% +4%
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
19.6 fps ∼84%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
18.5 fps ∼79% -6%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
17.6 fps ∼76% -10%
1280x720 low (fps_test=1)
Average of class Subnotebook
  (5.04 - 96.4, n=65)
30.7 fps ∼100% +17%
Asus VivoBook 14 X403FA
Intel Core i5-8265U, Intel UHD Graphics 620
27.3 fps ∼89% +4%
Average AMD Radeon RX Vega 8 (Ryzen 2000/3000)
  (19.2 - 39.9, n=21)
26.9 fps ∼88% +2%
Lenovo IdeaPad S540-13API
AMD Ryzen 5 3550H, AMD Radeon RX Vega 8 (Ryzen 2000/3000)
26.3 fps ∼86%
Lenovo ThinkBook 13s-20R90071GE
Intel Core i5-8265U, Intel UHD Graphics 620
25.4 fps ∼83% -3%
low med. high ultra4K
BioShock Infinite (2013) 21.15 fps
Dota 2 Reborn (2015) 75 66 41.2 38.5 14.7 fps
X-Plane 11.11 (2018) 26.3 19.6 17.1 fps

Emissions & Energy - Quiet 13-inch Laptop with Good Battery Life

System Noise

In day-to-day use, the IdeaPad S540 is very quiet and even under load, the two fans are barely audible. We also did not detect coil whine or electronic noises on our test model. In conclusion, the Lenovo laptop is very well-suited to quiet environments.

Noise Level

Idle
28.6 / 28.6 / 29.2 dB(A)
Load
31.4 / 34.4 dB(A)
  red to green bar
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Audix TM1, Arta (15 cm distance)   environment noise: 28.6 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2035.73233.136.235.832252725.525.424.225.928.73128.927.525.525.826.627.94026.925.528.225.425.825.65025.525.22524.12424.16324.423.424.324.32423.78024.12322.522.922.324.310023.424.52523.822.523.412523.122.92223.121.522.11602320.922.122.421.221.720022.621.721.521.821.322.425022.32221.321.12221.931522.120.621.220.621.822.140022.820.320.619.920.12350022.821.120.219.918.723.563021.720.519.719.218.321.880020.419.718.718.317.920.7100022.520.119.218.717.522.912502219.518.818.416.722.716002420.619.218.116.324.3200023.719.918.418.116.223.7250024.921.220.51915.125.1315025.320.818.116.61525.4400019.916.415.715.71520500016.915.615.515.514.917.1630016.315.515.415.51516.5800015.715.515.315.41515.81000015.315.315.315.214.815.51250015.115.315.115.214.915.31600014.914.9151514.814.9SPL34.231.430.429.828.634.4N1.91.51.41.31.12median 22.3median 20.3median 19.2median 18.4median 16.7median 22.1Delta2.12.22.32.432.4hearing rangehide median Fan NoiseLenovo IdeaPad S540-13API

Temperature

According to our measurements, the surface temperatures of the IdeaPad S540-13API can reach up to 28 °C (~82 °F) during idle and up to 42.9 °C (~109 °F) under load. While the small laptop does become warm, the surfaces never reach temperatures that are too hot for use on your lap, for example.

During our stress test, which ran for about an hour, three different power limits were active thanks to AMD's skin temperature power management (STAPM). In the beginning, the base clock was maintained for a short period of time at 30 watts. Then, a drop to 25 watts and 1.8 GHz for the consumption and the clock rate, respectively, followed fairly quickly. After a few minutes, the frequency and power limit dropped even further to 1.6 GHz and 20 watts, respectively. Since the aforementioned stress scenario almost never occurs during daily use, users do not need to worry about being restricted due to temperature limits on the inside of the laptop.

For comparison: We observed a power limit of 20 W and a clock rate of 2.6 GHz in our Cinebench R15 loop test. With a power limit of 25 watts, the CPU ran at 2.9 GHz and at 3.1 GHz with 30 watts.

Stress test 30 watts
Stress test 30 watts
Stress test 25 watts
Stress test 25 watts
Stress test 20 watts
Stress test 20 watts
Max. Load
 41.1 °C
106 F
41.1 °C
106 F
37.2 °C
99 F
 
 39.6 °C
103 F
40 °C
104 F
35.8 °C
96 F
 
 31.3 °C
88 F
28.9 °C
84 F
30 °C
86 F
 
Maximum: 41.1 °C = 106 F
Average: 36.1 °C = 97 F
35.2 °C
95 F
42.2 °C
108 F
42.9 °C
109 F
30.8 °C
87 F
40.9 °C
106 F
42.4 °C
108 F
28.8 °C
84 F
31 °C
88 F
31.5 °C
89 F
Maximum: 42.9 °C = 109 F
Average: 36.2 °C = 97 F
Power Supply (max.)  34.9 °C = 95 F | Room Temperature 20.3 °C = 69 F | Voltcraft IR-900
(±) The average temperature for the upper side under maximal load is 36.1 °C / 97 F, compared to the average of 30.6 °C / 87 F for the devices in the class Subnotebook.
(±) The maximum temperature on the upper side is 41.1 °C / 106 F, compared to the average of 35.7 °C / 96 F, ranging from 22 to 57 °C for the class Subnotebook.
(±) The bottom heats up to a maximum of 42.9 °C / 109 F, compared to the average of 39.6 °C / 103 F
(+) In idle usage, the average temperature for the upper side is 25.6 °C / 78 F, compared to the device average of 30.6 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 31.3 °C / 88.3 F and are therefore cool to the touch.
(-) The average temperature of the palmrest area of similar devices was 28.4 °C / 83.1 F (-2.9 °C / -5.2 F).
Thermal image under load - top
Thermal image under load - top
Thermal image under load - bottom
Thermal image under load - bottom

Speaker

The speakers of the Lenovo IdeaPad S540-13API offer a moderate maximum volume level and a sound that emphasizes mid and high tones. While audio playback could pack more of a punch, the speakers are suitable for occasional consumption of multimedia content.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2035.831.92525.925.33126.627.94025.826.5502425.46324238022.323.510022.524.312521.52516021.22820021.337.32502249.631521.85640020.159.850018.763.363018.367.380017.969.7100017.567.6125016.768.4160016.368200016.268250015.167.731501567.640001570.2500014.971.96300157180001565.21000014.863.71250014.9671600014.860.2SPL28.680.5N1.148.8median 16.7median 67Delta3935.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6median 17.84.62.4hearing rangehide median Pink NoiseLenovo IdeaPad S540-13APIApple MacBook 12 (Early 2016) 1.1 GHz
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Lenovo IdeaPad S540-13API audio analysis

(±) | speaker loudness is average but good (80.5 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 30.3% lower than median
(±) | linearity of bass is average (10.8% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.2% away from median
(+) | mids are linear (4.2% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.7% away from median
(+) | highs are linear (3.6% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (19.4% difference to median)
Compared to same class
» 56% of all tested devices in this class were better, 9% similar, 35% worse
» The best had a delta of 8%, average was 19%, worst was 50%
Compared to all devices tested
» 40% of all tested devices were better, 8% similar, 53% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Apple MacBook 12 (Early 2016) 1.1 GHz audio analysis

(+) | speakers can play relatively loud (83.6 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.3% lower than median
(±) | linearity of bass is average (14.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.4% away from median
(+) | mids are linear (5.5% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2% away from median
(+) | highs are linear (4.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (9.3% difference to median)
Compared to same class
» 2% of all tested devices in this class were better, 1% similar, 97% worse
» The best had a delta of 8%, average was 19%, worst was 50%
Compared to all devices tested
» 2% of all tested devices were better, 0% similar, 98% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Energy Consumption

According to our measurements, the Lenovo laptop consumes at least 5.6 watts during idle and up to 48.3 watts under load. These values are reasonable for the installed hardware. The included USB Type-C adapter is rated for 65 watts and thus sufficiently dimensioned for adequately powering the IdeaPad S540 in any situation.

Power Consumption
Off / Standbydarklight 0.34 / 0.55 Watt
Idledarkmidlight 5.6 / 8.2 / 9.1 Watt
Load midlight 37.6 / 48.3 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy

Battery Life

In our real-world Wi-Fi test, the IdeaPad S540-13API lasts around ten and a half hours. This is an above average result compared to the competitors we chose and hints at an effective use of the 65-Wh battery. At maximum brightness, it still reaches a runtime of just under seven hours.

Battery Runtime - WiFi Websurfing 1.3
Asus VivoBook 14 X403FA
i5-8265U, UHD Graphics 620, 72 Wh
806 min ∼31% +29%
Asus VivoBook 14 X403FA
i5-8265U, UHD Graphics 620, 72 Wh
761 min ∼29% +21%
Lenovo IdeaPad S540-13API
R5 3550H, Vega 8, 56 Wh
627 min ∼24%
Lenovo ThinkBook 13s-20R90071GE
i5-8265U, UHD Graphics 620, 45 Wh
545 min ∼21% -13%
Average of class Subnotebook
  (206 - 991, n=286)
504 min ∼19% -20%
Acer Swift 3 SF314-41-R8HZ
R5 3500U, Vega 8, 48 Wh
497 min ∼19% -21%
Acer TravelMate X514-51-511Q
i5-8265U, UHD Graphics 620, 36 Wh
378 min ∼14% -40%
Battery Runtime
NBC WiFi Websurfing Battery Test 1.3
10h 27min
NBC WiFi Websurfing Battery Test 1.3 max Brightness
6h 48min

Pros

+ Good long-term performance
+ lots of dual-channel RAM
+ long battery life
+ good color space coverage
+ good input devices

Cons

- glossy display
- meager port selection
- few maintenance options

Verdict - IdeaPad S540-13API is Super-Mobile and Offers Good Performance

In review: Lenovo IdeaPad S540-13API. Test device courtesy of:
In review: Lenovo IdeaPad S540-13API. Test device courtesy of:

Our tests show the Lenovo IdeaPad S540-13API to be a very well-performing laptop. The installed hardware does not leave much to be desired for daily use and effortlessly handles most tasks. The increased TDP of the AMD Ryzen 5 3550H mainly benefits the continuous performance. As a result, users can work on demanding tasks for a little longer, without being faced with a heavy performance drop off. Our 16 GB dual-channel memory configuration also positively affects the performance of the integrated AMD Radeon RX Vega 8. As a result, can even play games which are not as demanding.

The Lenovo IdeaPad S540-13API is a powerful and highly mobile companion with only minor weaknesses.

In our Wi-Fi test, the mobile laptop shines with a very long battery life and the input devices feel comfortable to use as well. The wireless speeds could have been slightly better, however. Our only real criticisms are the meager port selection and the shortcomings of the glossy display. Furthermore, only one USB type-C and one USB type-A port are available when the laptop is plugged in. Finally, we also would have liked to see the inclusion of a card reader.

Lenovo IdeaPad S540-13API - 12/21/2019 v7
Mike Wobker

Chassis
85 / 98 → 87%
Keyboard
81%
Pointing Device
92%
Connectivity
34 / 75 → 45%
Weight
72 / 20-75 → 94%
Battery
88%
Display
86%
Games Performance
60 / 78 → 77%
Application Performance
81 / 85 → 95%
Temperature
91%
Noise
97%
Audio
79 / 91 → 86%
Camera
39 / 85 → 46%
Average
76%
85%
Subnotebook - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Lenovo IdeaPad S540-13API Laptop in Review: Slim Ryzen Companion with Long Battery Life
Mike Wobker, 2019-12-22 (Update: 2019-12-25)
Mike Wobker
Editor of the original article: Mike Wobker - Editor
I made my first IT walking attempts on a 386 with 4 MB of RAM. After that followed various PCs and notebooks, which I looked after and repaired in my circle of friends and acquaintances. After an apprenticeship as a telecommunications systems engineer and several years of professional experience, I graduated with a bachelor's degree in industrial engineering. Today I live out my fascination for IT, technology and mobile devices by writing test reports. In my free time I like to devote myself to vegan cooking and spend time with my family, which includes a whole range of animal roommates.