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MagyarLenovo Yoga Book 9 13IMU9 2-in-1 dual screen review: Core Ultra 7 155U and Arc 4 are a mixed bag
The Lenovo Yoga Book 9i 2-in-1 Dual Screen made its debut at CES 2023 before launching that summer for $2000 USD. For 2024, the manufacturer has swapped out the Raptor Lake-U processor for Meteor Lake-U while keeping almost everything else the same.
Our test unit comes with the Core Ultra 7 155U CPU, 16 GB of LPDDR5x-7467 RAM, 1 TB M.2 2242 PCIe4 x4 NVMe SSD, and two identical 2800 x 1800 OLED HDR500 touchscreens for the same 2023 launch price of $2000.
More Lenovo reviews:
Potential Competitors in Comparison
Rating | Date | Model | Weight | Height | Size | Resolution | Best Price |
|---|---|---|---|---|---|---|---|
| 87 % | 04/2024 | Lenovo Yoga Book 9 13IMU9 Ultra 7 155U, Graphics 4-Core | 1.4 kg | 15.95 mm | 13.30" | 2880x1800 | |
| 86.4 % | 05/2023 | Lenovo Yoga Book 9i 2-in-1 Dual Screen i7-1355U, Iris Xe G7 96EUs | 1.6 kg | 15.95 mm | 13.30" | 2880x1800 | |
| 90.5 % | 04/2024 | Lenovo Yoga 9 2-in-1 14IMH9 Ultra 7 155H, Arc 8-Cores | 1.3 kg | 15.9 mm | 14.00" | 2880x1800 | |
| 86.7 % | 10/2021 | Dell XPS 13 9310 2-in-1 i7-1165G7, Iris Xe G7 96EUs | 1.3 kg | 14.35 mm | 13.40" | 1920x1200 | |
| 91.4 % | 02/2024 | HP Spectre x360 14-eu0078ng Ultra 7 155H, Arc 8-Cores | 1.5 kg | 16.9 mm | 14.00" | 2880x1800 | |
| 87.8 % | 03/2024 | Asus Zenbook Duo OLED UX8406MA Ultra 9 185H, Arc 8-Cores | 1.7 kg | 19.9 mm | 14.00" | 2880x1800 |
Case — Double Displays
There are no changes to the chassis except for the new Microsoft Co-Pilot key on the included Bluetooth keyboard. Some new color options would have been nice to see to better differentiate the 2023 and 2024 options.
We recommend checking out our review on the 2023 model to learn more about the physical features of the Yoga Book 9 13IMU9 2-in-1.
Communication
| Networking | |
| iperf3 transmit AX12 | |
| Dell XPS 13 9310 2-in-1 | |
| iperf3 receive AX12 | |
| Dell XPS 13 9310 2-in-1 | |
| iperf3 transmit AXE11000 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| iperf3 receive AXE11000 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| iperf3 transmit AXE11000 6GHz | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| iperf3 receive AXE11000 6GHz | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
Webcam
Display — No Major Changes
The same Samsung SDC ATNA33AA02-0 OLED panels have returned from the 2023 model meaning the visual experience has not changed. While the screens are vivid and super spacious for multitasking, the 60 Hz refresh rate is starting to feel long in the tooth when other OLED laptops like the Lenovo IdeaPad Slim 7i Pro or Asus ZenBook offer 90 Hz or faster.
The two screens still exhibit many of the same annoying behaviors as the 2023 model. For example, the positioning of the screens always resets after rebooting even if a third external screen is connected. Thus, you can expect to spend a lot of time rearranging your screens when docking the laptop.
| |||||||||||||||||||||||||
Brightness Distribution: 97 %
Center on Battery: 362.6 cd/m²
Contrast: ∞:1 (Black: 0 cd/m²)
ΔE Color 4.66 | 0.5-29.43 Ø5, calibrated: 0.56
ΔE Greyscale 2.6 | 0.57-98 Ø5.3
97% AdobeRGB 1998 (Argyll 2.2.0 3D)
100% sRGB (Argyll 2.2.0 3D)
99.7% Display P3 (Argyll 2.2.0 3D)
Gamma: 2.2
| Lenovo Yoga Book 9 13IMU9 SDC ATNA33AA02-0, OLED, 2880x1800, 13.30 | Lenovo Yoga Book 9i 2-in-1 Dual Screen SDC ATNA33AA02-0, OLED, 2880x1800, 13.30 | Lenovo Yoga 9 2-in-1 14IMH9 LEN140WQ+, OLED, 2880x1800, 14.00 | Dell XPS 13 9310 2-in-1 Sharp LQ134N1, IPS, 1920x1200, 13.40 | HP Spectre x360 14-eu0078ng SDC4197, OLED, 2880x1800, 14.00 | Asus Zenbook Duo OLED UX8406MA SDC419D, OLED, 2880x1800, 14.00 | |
|---|---|---|---|---|---|---|
| Display | -1% | 0% | -19% | -3% | -2% | |
| Display P3 Coverage | 99.7 | 99.8 0% | 99.8 0% | 69.7 -30% | 99.8 0% | 99.6 0% |
| sRGB Coverage | 100 | 100 0% | 100 0% | 99 -1% | 100 0% | 100 0% |
| AdobeRGB 1998 Coverage | 97 | 95.4 -2% | 97.3 0% | 71.7 -26% | 89.3 -8% | 91.8 -5% |
| Response Times | 2% | 137% | -205% | 274% | 274% | |
| Response Time Grey 50% / Grey 80% * | 1.88 ? | 1.83 ? 3% | 0.8 ? 57% | 55.6 ? -2857% | 0.77 ? 59% | 0.77 ? 59% |
| Response Time Black / White * | 2.1 ? | 2.03 ? 3% | 1 ? 52% | 40.4 ? -1824% | 0.75 ? 64% | 0.76 ? 64% |
| PWM Frequency | 60 ? | 60 ? 0% | 240.5 ? 301% | 2500 ? 4067% | 480 700% | 480 ? 700% |
| Screen | 2% | -26% | -15% | 31% | 25% | |
| Brightness middle | 362.6 | 359.7 -1% | 371.6 2% | 555.7 53% | 378 4% | 381 5% |
| Brightness | 368 | 363 -1% | 373 1% | 528 43% | 384 4% | 384 4% |
| Brightness Distribution | 97 | 98 1% | 99 2% | 90 -7% | 97 0% | 98 1% |
| Black Level * | 0.35 | |||||
| Colorchecker dE 2000 * | 4.66 | 4.51 3% | 4.91 -5% | 4.83 -4% | 1.4 70% | 1.6 66% |
| Colorchecker dE 2000 max. * | 7.25 | 7.05 3% | 8.33 -15% | 8.46 -17% | 2.2 70% | 2 72% |
| Colorchecker dE 2000 calibrated * | 0.56 | 1.59 -184% | 0.76 -36% | |||
| Greyscale dE 2000 * | 2.6 | 2.4 8% | 2.2 15% | 6.1 -135% | 1.7 35% | 2.6 -0% |
| Gamma | 2.2 100% | 2.18 101% | 2.25 98% | 1.98 111% | 2.17 101% | 2.2 100% |
| CCT | 6055 107% | 6112 106% | 6120 106% | 6686 97% | 6256 104% | 6784 96% |
| Contrast | 1588 | |||||
| Total Average (Program / Settings) | 1% /
1% | 37% /
17% | -80% /
-60% | 101% /
83% | 99% /
81% |
* ... smaller is better
While the two displays are not calibrated at factory, they nonetheless offer P3 colors with relatively low average deltaE values.
Display Response Times
| ↔ Response Time Black to White | ||
|---|---|---|
| 2.1 ms ... rise ↗ and fall ↘ combined | ↗ 0.9 ms rise |  |
| ↘ 1.2 ms fall | ||
| The screen shows very fast response rates in our tests and should be very well suited for fast-paced gaming. In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 7 % of all devices are better. This means that the measured response time is better than the average of all tested devices (21.5 ms). | ||
| ↔ Response Time 50% Grey to 80% Grey | ||
| 1.88 ms ... rise ↗ and fall ↘ combined | ↗ 1 ms rise |  |
| ↘ 0.88 ms fall | ||
| The screen shows very fast response rates in our tests and should be very well suited for fast-paced gaming. In comparison, all tested devices range from 0.2 (minimum) to 636 (maximum) ms. » 5 % of all devices are better. This means that the measured response time is better than the average of all tested devices (33.7 ms). | ||
Screen Flickering / PWM (Pulse-Width Modulation)
| Screen flickering / PWM detected | 60 Hz | ≤ 100 % brightness setting |  |
The display backlight flickers at 60 Hz (worst case, e.g., utilizing PWM) Flickering detected at a brightness setting of 100 % and below. There should be no flickering or PWM above this brightness setting. The frequency of 60 Hz is very low, so the flickering may cause eyestrain and headaches after extended use. In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 17898 (minimum: 5 - maximum: 3846000) Hz was measured. | |||
Pulse-width modulation is present on all brightness levels including the maximum setting. Its frequency is around 237 Hz from 0 to 57 percent brightness before changing to 60 Hz from 58 percent brightness and up.
Performance — New Processor Doesn't Change Much
Testing Conditions
We set the system to Performance mode prior to running the benchmarks below. Lenovo Vantage has also been redesigned this year to be easier to navigate, but its text boxes still do not utilize the full width of the screen and so there are huge swaths of empty white space as shown by the screenshots below.
Processor
Not to be confused with the Core Ultra 7 155H, the Core Ultra 7 155U is the ULV variant with both slower clock rates and a slower integrated GPU. In this case, the Core Ultra 7 155U in our Lenovo is about 35 percent slower than the Core Ultra 7 155H in the Yoga 9 2-in-1 14IMH9. The delta is quite significant to the point where the CPU in our 2024 Yoga Book is just barely faster than the Core i7-1355U in the older 2023 model by single-digit percentage points.
Cinebench R15 Multi Loop
Cinebench R23: Multi Core | Single Core
Cinebench R20: CPU (Multi Core) | CPU (Single Core)
Cinebench R15: CPU Multi 64Bit | CPU Single 64Bit
Blender: v2.79 BMW27 CPU
7-Zip 18.03: 7z b 4 | 7z b 4 -mmt1
Geekbench 6.2: Multi-Core | Single-Core
Geekbench 5.5: Multi-Core | Single-Core
HWBOT x265 Benchmark v2.2: 4k Preset
LibreOffice : 20 Documents To PDF
R Benchmark 2.5: Overall mean
| Geekbench 6.2 / Multi-Core | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Dell Latitude 9450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Geekbench 6.2 / Single-Core | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Dell Latitude 9450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
Cinebench R23: Multi Core | Single Core
Cinebench R20: CPU (Multi Core) | CPU (Single Core)
Cinebench R15: CPU Multi 64Bit | CPU Single 64Bit
Blender: v2.79 BMW27 CPU
7-Zip 18.03: 7z b 4 | 7z b 4 -mmt1
Geekbench 6.2: Multi-Core | Single-Core
Geekbench 5.5: Multi-Core | Single-Core
HWBOT x265 Benchmark v2.2: 4k Preset
LibreOffice : 20 Documents To PDF
R Benchmark 2.5: Overall mean
* ... smaller is better
AIDA64: FP32 Ray-Trace | FPU Julia | CPU SHA3 | CPU Queen | FPU SinJulia | FPU Mandel | CPU AES | CPU ZLib | FP64 Ray-Trace | CPU PhotoWorxx
| Performance Rating | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / FP32 Ray-Trace | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / FPU Julia | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / CPU SHA3 | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / CPU Queen | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| AIDA64 / FPU SinJulia | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / FPU Mandel | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / CPU AES | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / CPU ZLib | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / FP64 Ray-Trace | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / CPU PhotoWorxx | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
System Performance
Average PCMark results are slightly higher than what we recorded on the 2023 Yoga Book 9. The minor but consistent year-over-year advantages can be attributed to small internal improvements such as the slightly faster CPU (Raptor Lake-U to Meteor Lake-U), iGPU (Iris Xe 96 EUs to Arc 4), and RAM (4266 MHz to 7467 MHz).
CrossMark: Overall | Productivity | Creativity | Responsiveness
WebXPRT 3: Overall
WebXPRT 4: Overall
Mozilla Kraken 1.1: Total
| PCMark 10 / Score | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| PCMark 10 / Essentials | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Asus Zenbook Duo OLED UX8406MA | |
| Dell XPS 13 9310 2-in-1 | |
| PCMark 10 / Productivity | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| PCMark 10 / Digital Content Creation | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| CrossMark / Overall | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| HP Spectre x360 14-eu0078ng | |
| CrossMark / Productivity | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| HP Spectre x360 14-eu0078ng | |
| CrossMark / Creativity | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| CrossMark / Responsiveness | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| HP Spectre x360 14-eu0078ng | |
| WebXPRT 3 / Overall | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Dell XPS 13 9310 2-in-1 | |
| WebXPRT 4 / Overall | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Mozilla Kraken 1.1 / Total | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) () | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Asus Zenbook Duo OLED UX8406MA | |
* ... smaller is better
| PCMark 10 Score | 6055 points | |
Help | ||
| AIDA64 / Memory Copy | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| AIDA64 / Memory Read | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / Memory Write | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Dell XPS 13 9310 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| AIDA64 / Memory Latency | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 155U () | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
* ... smaller is better
DPC Latency
LatencyMon shows only minor DPC issues when opening multiple browser tabs of our homepage while 4K video playback at 60 Hz is perfect with no dropped frames recorded.
| DPC Latencies / LatencyMon - interrupt to process latency (max), Web, Youtube, Prime95 | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| HP Spectre x360 14-eu0078ng | |
| Dell XPS 13 9310 2-in-1 | |
| Asus Zenbook Duo OLED UX8406MA | |
* ... smaller is better
Storage Devices
Our test unit uses the same Western Digital PC SN740 NVMe SSD as before albeit at double capacity (1 TB vs. 512 GB). Performance is steady with just minor-moderate throttling after a few minutes of stress as shown by our DiskSpd loop test results below.
* ... smaller is better
Disk Throttling: DiskSpd Read Loop, Queue Depth 8
GPU Performance — Arc 4 Feels Like Iris Xe
Unlike the Core Ultra H series and its integrated Arc 8 graphics, the Core Ultra U series come with integrated Arc 4 graphics instead. Arc 4 is significantly slower by 30 to 50 percent which puts it far behind even the older Radeon 680M. In fact, the new GPU is barely any faster than the Iris Xe 96 EUs in last year's Yoga Book 9 as shown by their near identical 3DMark scores and gaming performances below.
| Power Profile | Graphics Score | Physics Score | Combined Score |
| Performance Mode | 5390 | 19839 | 1843 |
| Balanced Mode | 5433 | 18727 | 1803 |
| Battery Power | 5373 | 20285 | 1902 |
There are no appreciable performance differences between Performance, Balanced, and Battery modes as shown by our Fire Strike results table above.
| 3DMark 11 Performance | 7237 points | |
| 3DMark Cloud Gate Standard Score | 22940 points | |
| 3DMark Fire Strike Score | 4975 points | |
| 3DMark Time Spy Score | 1922 points | |
Help | ||
* ... smaller is better
| Performance Rating - Percent | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell XPS 13 9310 2-in-1 | |
| The Witcher 3 - 1920x1080 Ultra Graphics & Postprocessing (HBAO+) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| HP Spectre x360 14-eu0078ng | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| Final Fantasy XV Benchmark - 1920x1080 High Quality | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell XPS 13 9310 2-in-1 | |
| Strange Brigade - 1920x1080 ultra AA:ultra AF:16 | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell XPS 13 9310 2-in-1 | |
| Dota 2 Reborn - 1920x1080 ultra (3/3) best looking | |
| HP Spectre x360 14-eu0078ng | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell XPS 13 9310 2-in-1 | |
| X-Plane 11.11 - 1920x1080 high (fps_test=3) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP Spectre x360 14-eu0078ng | |
| Dell XPS 13 9310 2-in-1 | |
| Asus Zenbook Duo OLED UX8406MA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Tiny Tina's Wonderlands | |
| 1280x720 Lowest Preset (DX12) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Dell Latitude 9450 2-in-1 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (54.8 - 61.8, n=3) | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo IdeaPad Flex 5 14IRU8 | |
| 1920x1080 Low Preset (DX12) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (29.9 - 30.8, n=2) | |
| Lenovo IdeaPad Flex 5 14IRU8 | |
| 1920x1080 Medium Preset (DX12) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (24 - 24.2, n=2) | |
| Lenovo IdeaPad Flex 5 14IRU8 | |
| 1920x1080 High Preset (DX12) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (16.1 - 16.3, n=2) | |
| Lenovo IdeaPad Flex 5 14IRU8 | |
| 1920x1080 Badass Preset (DX12) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (12.7 - 13.8, n=2) | |
| Lenovo IdeaPad Flex 5 14IRU8 | |
| Cyberpunk 2077 2.0 Phantom Liberty | |
| 1280x720 Low Preset (FSR off) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (31.7 - 32.8, n=3) | |
| Dell Latitude 9450 2-in-1 | |
| 1920x1080 Low Preset (FSR off) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (20.3 - 21.6, n=3) | |
| Dell Latitude 9450 2-in-1 | |
| 1920x1080 Medium Preset (FSR off) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (16.7 - 17.6, n=3) | |
| Dell Latitude 9450 2-in-1 | |
| 1920x1080 High Preset (FSR off) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (14.3 - 14.9, n=3) | |
| Dell Latitude 9450 2-in-1 | |
| 1920x1080 Ultra Preset (FSR off) | |
| Lenovo Yoga 9 2-in-1 14IMH9 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell Latitude 9450 2-in-1 | |
| Average Intel Graphics 4-Cores iGPU (Arc) (12.5 - 13, n=3) | |
Multiple dips in frame rate are present when idling on Witcher 3 to suggest interrupting background activity or an underlying driver issue. This is in contrast to the 2023 model which would return steady frame rates with no micro-stuttering when running the same test.
Witcher 3 FPS Chart
| low | med. | high | ultra | |
| The Witcher 3 (2015) | 92.1 | 57 | 32.4 | 17.9 |
| Dota 2 Reborn (2015) | 82.6 | 59.7 | 57.2 | 54.2 |
| Final Fantasy XV Benchmark (2018) | 37.4 | 23.4 | 16.3 | |
| X-Plane 11.11 (2018) | 34.7 | 28.3 | 23.6 | |
| Far Cry 5 (2018) | 47 | 25 | 24 | 22 |
| Strange Brigade (2018) | 118.1 | 50.8 | 37.7 | 30.3 |
| Tiny Tina's Wonderlands (2022) | 30.8 | 24.2 | 16.3 | 13.8 |
| F1 22 (2022) | 43.8 | 40.5 | ||
| Baldur's Gate 3 (2023) | 16.2 | 12.6 | ||
| Cyberpunk 2077 2.0 Phantom Liberty (2023) | 21.6 | 17.6 | 14.9 | 13 |
Emissions — Noticeably Quieter
System Noise
While CPU and GPU performances are flat, fan noise is surprisingly much quieter than on last year's model. Running Witcher 3, for example, tops out at just over 27 dB(A) compared to over 34 dB(A) on the 2023 Yoga Book 9i. We double-checked our power settings and repeated the test just to be sure and the results would not change.
Noise Level
| Idle |
| 23.3 / 23.3 / 24.6 dB(A) |
| Load |
| 26.2 / 27.3 dB(A) |
 | ||
30 dB silent 40 dB(A) audible 50 dB(A) loud |
||
min:  , med:  , max:  Earthworks M23R, Arta (15 cm distance) environment noise: 23.3 dB(A) | ||
| Lenovo Yoga Book 9 13IMU9 Graphics 4-Core, Ultra 7 155U | Lenovo Yoga Book 9i 2-in-1 Dual Screen Iris Xe G7 96EUs, i7-1355U, WD PC SN740 512GB SDDPMQD-512G-1101 | Lenovo Yoga 9 2-in-1 14IMH9 Arc 8-Cores, Ultra 7 155H, Samsung PM9C1a MZAL81T0HDLB | Dell XPS 13 9310 2-in-1 Iris Xe G7 96EUs, i7-1165G7, Toshiba BG4 KBG40ZPZ512G | HP Spectre x360 14-eu0078ng Arc 8-Cores, Ultra 7 155H, Kioxia XG8 KXG80ZNV2T04 | Asus Zenbook Duo OLED UX8406MA Arc 8-Cores, Ultra 9 185H, WD PC SN740 SDDPNQE-2T00 | |
|---|---|---|---|---|---|---|
| Noise | -14% | -21% | -22% | -5% | -22% | |
| off / environment * | 23.3 | 22.6 3% | 23.2 -0% | 24.3 -4% | 23.4 -0% | 24 -3% |
| Idle Minimum * | 23.3 | 23.1 1% | 23.6 -1% | 24.8 -6% | 23.4 -0% | 24 -3% |
| Idle Average * | 23.3 | 23.1 1% | 23.6 -1% | 24.8 -6% | 23.4 -0% | 24 -3% |
| Idle Maximum * | 24.6 | 23.1 6% | 25 -2% | 24.8 -1% | 25.6 -4% | 26.7 -9% |
| Load Average * | 26.2 | 38.6 -47% | 34.8 -33% | 38 -45% | 25.6 2% | 39.4 -50% |
| Witcher 3 ultra * | 27.3 | 34.2 -25% | 37.7 -38% | 38 -39% | 30.9 -13% | 39.4 -44% |
| Load Maximum * | 27.3 | 38.3 -40% | 46.2 -69% | 41.5 -52% | 32.6 -19% | 39.4 -44% |
* ... smaller is better
Temperature
Surface temperatures are about the same as before if not even warmer by a few degrees C. Thus, the newer model doesn't necessarily run cooler despite the new processor upgrade.
(+) The maximum temperature on the upper side is 39.2 °C / 103 F, compared to the average of 35.3 °C / 96 F, ranging from 19.6 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 41 °C / 106 F, compared to the average of 36.7 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 30.7 °C / 87 F, compared to the device average of 30.2 °C / 86 F.
(+) The palmrests and touchpad are reaching skin temperature as a maximum (32.2 °C / 90 F) and are therefore not hot.
(-) The average temperature of the palmrest area of similar devices was 28.1 °C / 82.6 F (-4.1 °C / -7.4 F).
| Lenovo Yoga Book 9 13IMU9 Intel Core Ultra 7 155U, Intel Graphics 4-Cores iGPU (Arc) | Lenovo Yoga Book 9i 2-in-1 Dual Screen Intel Core i7-1355U, Intel Iris Xe Graphics G7 96EUs | Lenovo Yoga 9 2-in-1 14IMH9 Intel Core Ultra 7 155H, Intel Arc 8-Cores iGPU | Dell XPS 13 9310 2-in-1 Intel Core i7-1165G7, Intel Iris Xe Graphics G7 96EUs | HP Spectre x360 14-eu0078ng Intel Core Ultra 7 155H, Intel Arc 8-Cores iGPU | Asus Zenbook Duo OLED UX8406MA Intel Core Ultra 9 185H, Intel Arc 8-Cores iGPU | |
|---|---|---|---|---|---|---|
| Heat | 4% | -4% | -1% | 10% | 2% | |
| Maximum Upper Side * | 39.2 | 37 6% | 40 -2% | 51 -30% | 39.3 -0% | 35.6 9% |
| Maximum Bottom * | 41 | 37.2 9% | 43 -5% | 45.4 -11% | 45 -10% | 46.6 -14% |
| Idle Upper Side * | 32.2 | 31.4 2% | 32 1% | 24.4 24% | 23.8 26% | 27.1 16% |
| Idle Bottom * | 31.6 | 31.6 -0% | 35.2 -11% | 27.4 13% | 24 24% | 32.3 -2% |
* ... smaller is better
Stress Test
Core clock rate and board power draw would spike to 3 GHz and 34 W, respectively, when initiating Prime95 stress. After reaching 85 C a few seconds later, however, the CPU would drop to 1.8 GHz and 25 W in order to maintain a cooler core temperature of 75 C. Maximum Turbo Boost performance is therefore short-lived as to be expected from laptops powered by U-series CPUs.
CPU package temperature would stabilize at 83 C when running Witcher 3 compared to 75 C on last year's model.
| CPU Clock (GHz) | GPU Clock (MHz) | Average CPU Temperature (°C) | |
| System Idle | -- | -- | 54 |
| Prime95 Stress | 1.9 | -- | 75 |
| Prime95 + FurMark Stress | ~1.5 | ~1150 | 73 |
| Witcher 3 Stress | ~1.8 | 1950 | 83 |
Speakers
Lenovo Yoga Book 9 13IMU9 audio analysis
(+) | speakers can play relatively loud (84.1 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 8.2% lower than median
(±) | linearity of bass is average (7.5% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.3% away from median
(+) | mids are linear (3.4% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 1.3% away from median
(+) | highs are linear (2.4% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (7.4% difference to median)
Compared to same class
» 1% of all tested devices in this class were better, 1% similar, 98% worse
» The best had a delta of 6%, average was 21%, worst was 57%
Compared to all devices tested
» 1% of all tested devices were better, 0% similar, 99% worse
» The best had a delta of 4%, average was 25%, worst was 134%
Apple MacBook Pro 16 2021 M1 Pro audio analysis
(+) | speakers can play relatively loud (84.7 dB)
Bass 100 - 315 Hz
(+) | good bass - only 3.8% away from median
(+) | bass is linear (5.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 1.3% away from median
(+) | mids are linear (2.1% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 1.9% away from median
(+) | highs are linear (2.7% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (4.6% difference to median)
Compared to same class
» 0% of all tested devices in this class were better, 0% similar, 100% worse
» The best had a delta of 5%, average was 18%, worst was 45%
Compared to all devices tested
» 0% of all tested devices were better, 0% similar, 100% worse
» The best had a delta of 4%, average was 25%, worst was 134%
Energy Management
Power Consumption
Running Witcher 3 draws about 42 W compared to 45 W on the 2023 model. The newer Arc 4 GPU can therefore provide the same graphics performance as the Iris Xe 96 EUs but at lower power requirements across the board. This likely explains the quieter-than-expected fan noise levels mentioned above.
Consumption can be as high as 66 W when running Prime95 stress, but this rate would drop to 51 W after a few seconds due to Turbo Boost limitations as noted in the Stress Test section above.
| Off / Standby | 0.32 / 0.6 Watt |
| Idle | 7.1 / 9.1 / 18.4 Watt |
| Load |
51.3 / 65.5 Watt |
   
| |
| Lenovo Yoga Book 9 13IMU9 Ultra 7 155U, Graphics 4-Core, , OLED, 2880x1800, 13.30 | Lenovo Yoga Book 9i 2-in-1 Dual Screen i7-1355U, Iris Xe G7 96EUs, WD PC SN740 512GB SDDPMQD-512G-1101, OLED, 2880x1800, 13.30 | Lenovo Yoga 9 2-in-1 14IMH9 Ultra 7 155H, Arc 8-Cores, Samsung PM9C1a MZAL81T0HDLB, OLED, 2880x1800, 14.00 | Dell XPS 13 9310 2-in-1 i7-1165G7, Iris Xe G7 96EUs, Toshiba BG4 KBG40ZPZ512G, IPS, 1920x1200, 13.40 | HP Spectre x360 14-eu0078ng Ultra 7 155H, Arc 8-Cores, Kioxia XG8 KXG80ZNV2T04, OLED, 2880x1800, 14.00 | Asus Zenbook Duo OLED UX8406MA Ultra 9 185H, Arc 8-Cores, WD PC SN740 SDDPNQE-2T00, OLED, 2880x1800, 14.00 | |
|---|---|---|---|---|---|---|
| Power Consumption | -9% | 10% | 40% | 35% | 4% | |
| Idle Minimum * | 7.1 | 6.9 3% | 4.2 41% | 2.6 63% | 3.2 55% | 6.9 3% |
| Idle Average * | 9.1 | 11.6 -27% | 7.1 22% | 6.4 30% | 4.2 54% | 10.2 -12% |
| Idle Maximum * | 18.4 | 20.8 -13% | 12.9 30% | 7.7 58% | 4.9 73% | 10.9 41% |
| Load Average * | 51.3 | 55 -7% | 58.9 -15% | 29.9 42% | 40.5 21% | 52.8 -3% |
| Witcher 3 ultra * | 41.5 | 44.9 -8% | 49.5 -19% | 32.2 22% | 37.9 9% | 43.2 -4% |
| Load Maximum * | 65.5 | 68.1 -4% | 66.7 -2% | 47.5 27% | 68.6 -5% | 67.1 -2% |
* ... smaller is better
Battery Life
WLAN battery life is nearly identical year-over-year at about 10 hours with the second screen disabled. If both screens are enabled and displaying mostly white colors, however, our WLAN runtime would drop by almost half to just 5.5 hours. Since the vast majority of websites have white backgrounds, opening multiple browser tabs on both OLED screens can take a huge toll on battery life.
| Lenovo Yoga Book 9 13IMU9 Ultra 7 155U, Graphics 4-Core, 80 Wh | Lenovo Yoga Book 9i 2-in-1 Dual Screen i7-1355U, Iris Xe G7 96EUs, 80 Wh | Lenovo Yoga 9 2-in-1 14IMH9 Ultra 7 155H, Arc 8-Cores, 75 Wh | Dell XPS 13 9310 2-in-1 i7-1165G7, Iris Xe G7 96EUs, 51 Wh | HP Spectre x360 14-eu0078ng Ultra 7 155H, Arc 8-Cores, 68 Wh | Asus Zenbook Duo OLED UX8406MA Ultra 9 185H, Arc 8-Cores, 75 Wh | |
|---|---|---|---|---|---|---|
| Battery Runtime | -4% | -1% | 6% | -9% | -8% | |
| WiFi v1.3 | 608 | 586 -4% | 600 -1% | 643 6% | 555 -9% | 561 -8% |
| Reader / Idle | 680 | 855 | 1525 | |||
| Load | 219 | 93 | 205 | 129 | 146 | |
| H.264 | 999 | 820 |
Pros
Cons
Verdict — Quieter, But Not Any Faster
A CPU upgrade would usually improve performance as one might reasonably expect, but that is not the case with the 2024 Yoga Book 9i. Instead of running faster than its 2023 predecessor, the 2024 version runs quieter and at more power efficient levels. Users are therefore able to obtain similar levels of performance while simultaneously stretching out battery life with the newer model. This may be disappointing to those who were hoping for significantly faster performance, but the changes can at least improve runtimes for demanding applications.
The Lenovo 2024 Yoga Book 9i brings higher power efficiency, AI acceleration, and quieter fan noise to the table. Performance and features, however, remain flat year-over-year.
Interestingly, the 2024 model retails for $2000 whereas the 2023 model can currently be found for $1900. The price difference is much smaller than expected meaning that you may as well purchase the 2024 model over the 2023 model at least for now. Hopefully we will see steeper price cuts for the 2023 model in the months ahead to make the Yoga Book 9i more accessible to wider audiences especially since the two versions are identical in terms of appearance, displays, and overall performance.
Price and Availability
Lenovo is now shipping the Yoga Book 9i with Core Ultra 7 155U starting at $2060 USD.
Lenovo Yoga Book 9 13IMU9
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04/20/2024 v7
Allen Ngo
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Transparency
The present review sample was made available to the author as a loan by the manufacturer or a shop for the purposes of review. The lender had no influence on this review, nor did the manufacturer receive a copy of this review before publication. There was no obligation to publish this review.
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