Verdict — Super Spacious If You Have The Desk Space
Now in its third year, the 2025 Yoga Book 9i is a significant upgrade over its predecessors. Its processor is much faster this time while the two screens are larger and with double the refresh rate for a faster and more spacious user experience. More impressively, the Yoga Book 9i 14 isn't noticeably thicker or heavier than the 13-inch Yoga Book 9i despite all the improvements.
The above upgrades may be nice especially for power users who weren't satisfied with last year's Core U options, but the new demanding hardware has left its mark on overall battery life. Using both screens will cut runtimes by several hours compared to last year's option while the processor itself could have benefited from a stronger cooling solution to reduce some of the performance throttling. Opting for a portable external monitor like the ThinkVision 14 can cover a lot of what the Yoga Book 9i 14 offers without needing to spend over $2000 on a new system. It's not a gimmicky design as the second screen can come in handy for specific use cases or scenarios, but it certainly still feels clunky to use with its numerous accessories and removable keyboard versus a traditional clamshell or convertible.
Pros
Cons
The 2025 14-inch Yoga Book 9 14 succeeds last year's 2024 13-inch Yoga Book 9 13 with both larger screen sizes and new Core H CPU options to replace the slower Core U ones on older models. It otherwise shares very similar chassis designs and accessories as before and so many of our existing comments on the 2024 model still apply.
Our test unit carries the Core Ultra 7 255H Arrow Lake CPU with 16 GB of RAM for just under $2100 while higher-end SKUs carry the Core Ultra 9 285H with double the RAM.
More Lenovo reviews:
Specifications
Case
The larger 14-inch screen size necessitates a larger footprint when compared to last year's 13-inch model. Even so, thickness and weight are surprisingly not all that different between the two generations despite their screen size differences. The stainless magnesium exterior returns for similar impressions.
| Model Weight | Keyboard Weight | Combined Weight |
| 1214 g | 340 g | 1554 g |
Connectivity
Port options remain identical to the 2023 and 2024 models. All three USB-C ports feature Thunderbolt 4 connectivity.
Communication
Webcam
The 5 MP webcam with IR and electronic shutter remain the same.
Maintenance
The model is not easy to repair or service because of its unique design. Nevertheless, Lenovo provides an official maintenance manual for those who dare to risk warranty.
Sustainability
The USB-C adapter, speaker enclosure, and battery pack consist of up to 90 percent post-consumer content recycled plastics.
The packaging is plastic free.
Accessories And Warranty
The box includes the folio stand, protective carrying sleeve, wireless earbuds, wireless mouse, stylus pen, and wireless keyboard.
The usual one-year manufacturer warranty applies if purchased in the US.
Input Devices
Keyboard
The typing experience and behavior of the wireless keyboard haven't changed from last year's model. However, the keyboard is now longer due to the larger screen size for an extra column of auxiliary keys for quickly toggling power profiles, audio, reader mode, connected wireless devices, and a user-defined shortcut.
Touchpad
The touchpad experience is the same as on the Yoga Book 9 13. Its default virtual size (11 x 6 cm) can be extended to the entire width of the touchscreen (31 cm x 6 cm). The virtual mouse keys are accompanied by a weak vibration feedback when pressed much like on a smartphone, but they are also too easy to touch by accident.
Display
Not only is are the touchscreens larger, but they are each brighter than on last year's model for better HDR support up to 750 nits. Native refresh rate has doubled as well fro 60 Hz to 120 Hz for a smoother user experience.
Maximum brightness is otherwise limited to ~400 nits when set to SDR mode.
| |||||||||||||||||||||||||
Brightness Distribution: 94 %
Center on Battery: 381.7 cd/m²
Contrast: ∞:1 (Black: 0 cd/m²)
ΔE Color 2.93 | 0.5-29.43 Ø4.83, calibrated: 0.61
ΔE Greyscale 0.8 | 0.09-98 Ø5.1
92.2% AdobeRGB 1998 (Argyll 2.2.0 3D)
100% sRGB (Argyll 2.2.0 3D)
99.9% Display P3 (Argyll 2.2.0 3D)
Gamma: 2.16
| Lenovo Yoga Book 9 14IAH10 LEN140WQ+, 2x, OLED, 2880x1800, 14", 120 Hz | Lenovo Yoga Book 9 13IMU9 SDC ATNA33AA02-0, OLED, 2880x1800, 13.3", 60 Hz | Lenovo Yoga Book 9i 2-in-1 Dual Screen SDC ATNA33AA02-0, OLED, 2880x1800, 13.3", 60 Hz | HP EliteBook X Flip G1i 14 AI AUO8FB5, IPS, 1920x1200, 14", 60 Hz | Dell Latitude 7450 2-in-1 BOE NV140WU, IPS, 1920x1200, 14", 60 Hz | Asus ZenBook Duo OLED UX8406CA ATNA40CT02-0, OLED, 1920x1200, 14", 60 Hz | |
|---|---|---|---|---|---|---|
| Display | 2% | 1% | -13% | -14% | -3% | |
| Display P3 Coverage | 99.9 | 99.7 0% | 99.8 0% | 76.7 -23% | 76.5 -23% | 98.4 -2% |
| sRGB Coverage | 100 | 100 0% | 100 0% | 98.2 -2% | 100 0% | 99.8 0% |
| AdobeRGB 1998 Coverage | 92.2 | 97 5% | 95.4 3% | 78.2 -15% | 76 -18% | 86.7 -6% |
| Response Times | -162% | -154% | -5240% | -4039% | -40% | |
| Response Time Grey 50% / Grey 80% * | 0.6 ? | 1.88 ? -213% | 1.83 ? -205% | 49.2 ? -8100% | 35.65 ? -5842% | 1.51 ? -152% |
| Response Time Black / White * | 1 ? | 2.1 ? -110% | 2.03 ? -103% | 24.8 ? -2380% | 23.35 ? -2235% | 1.36 ? -36% |
| PWM Frequency | 480 ? | 60 ? | 60 ? | 480 ? | ||
| PWM Amplitude * | 43 | 14 67% | ||||
| Screen | -44% | -47% | -125% | -40% | -12% | |
| Brightness middle | 381.7 | 362.6 -5% | 359.7 -6% | 572 50% | 333 -13% | 359 -6% |
| Brightness | 398 | 368 -8% | 363 -9% | 541 36% | 326 -18% | 362 -9% |
| Brightness Distribution | 94 | 97 3% | 98 4% | 78 -17% | 85 -10% | 98 4% |
| Black Level * | 0.2 | 0.27 | ||||
| Colorchecker dE 2000 * | 2.93 | 4.66 -59% | 4.51 -54% | 4.19 -43% | 2.46 16% | 1.2 59% |
| Colorchecker dE 2000 max. * | 5.93 | 7.25 -22% | 7.05 -19% | 8.65 -46% | 4.58 23% | 3.2 46% |
| Colorchecker dE 2000 calibrated * | 0.61 | 0.56 8% | 2.11 -246% | 1.31 -115% | ||
| Greyscale dE 2000 * | 0.8 | 2.6 -225% | 2.4 -200% | 5.65 -606% | 2.1 -163% | 2.1 -163% |
| Gamma | 2.16 102% | 2.2 100% | 2.18 101% | 2.45 90% | 2.2 100% | 2.24 98% |
| CCT | 6404 101% | 6055 107% | 6112 106% | 5959 109% | 6578 99% | 6433 101% |
| Contrast | 2860 | 1233 | ||||
| Total Average (Program / Settings) | -68% /
-52% | -67% /
-54% | -1793% /
-949% | -1364% /
-700% | -18% /
-17% |
* ... smaller is better
Display Response Times
| ↔ Response Time Black to White | ||
|---|---|---|
| 1 ms ... rise ↗ and fall ↘ combined | ↗ 0.5 ms rise |  |
| ↘ 0.5 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. » 3 % of all devices are better. This means that the measured response time is better than the average of all tested devices (20.5 ms). | ||
| ↔ Response Time 50% Grey to 80% Grey | ||
| 0.6 ms ... rise ↗ and fall ↘ combined | ↗ 0.3 ms rise |  |
| ↘ 0.3 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 0.165 (minimum) to 636 (maximum) ms. » 1 % of all devices are better. This means that the measured response time is better than the average of all tested devices (32.1 ms). | ||
Screen Flickering / PWM (Pulse-Width Modulation)
| Screen flickering / PWM detected | 480 Hz Amplitude: 43 % | ≤ 100 % brightness setting |  |
The display backlight flickers at 480 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 480 Hz is relatively high, so most users sensitive to PWM should not notice any flickering. However, there are reports that some users are still sensitive to PWM at 500 Hz and above, so be aware. In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8343 (minimum: 5 - maximum: 343500) Hz was measured. | |||
Performance
Testing Conditions
We set Windows to Performance mode prior to running the benchmarks below.
Processor
The Core Ultra 7 255H is almost 2x faster than the Core Ultra 7 155U in the older Yoga Book 9 13IMU9. Nevertheless, performance decreases by 24 percent when stressed as shown by our CineBench R15 xT loop test results below due to limited Turbo Boost sustainability.
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 6.4: 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
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 6.4: 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 | |
| Average Intel Core Ultra 7 255H | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Dell Latitude 7450 2-in-1 | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / FP32 Ray-Trace | |
| Average Intel Core Ultra 7 255H (14508 - 24741, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / FPU Julia | |
| Average Intel Core Ultra 7 255H (72225 - 118886, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 14IAH10 | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / CPU SHA3 | |
| Average Intel Core Ultra 7 255H (3445 - 5548, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 14IAH10 | |
| Dell Latitude 7450 2-in-1 | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / CPU Queen | |
| Average Intel Core Ultra 7 255H (59810 - 68308, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| AIDA64 / FPU SinJulia | |
| Average Intel Core Ultra 7 255H (6995 - 8931, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 14IAH10 | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP EliteBook X Flip G1i 14 AI | |
| AIDA64 / FPU Mandel | |
| Average Intel Core Ultra 7 255H (37743 - 63347, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 14IAH10 | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / CPU AES | |
| Average Intel Core Ultra 7 255H (58402 - 83398, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP EliteBook X Flip G1i 14 AI | |
| AIDA64 / CPU ZLib | |
| Average Intel Core Ultra 7 255H (822 - 1316, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP EliteBook X Flip G1i 14 AI | |
| AIDA64 / FP64 Ray-Trace | |
| Average Intel Core Ultra 7 255H (7685 - 13231, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / CPU PhotoWorxx | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H (50511 - 65787, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
Stress Test
The 14-inch model runs cooler than last year's 13-inch model when gaming, but the opposite is true when the CPU is fully stressed to 100 percent. Note that CPU package power cycles between 25 W and 32 W when gaming which is not ideal as more consistent performance is preferable.
| Average CPU Clock (GHz) | GPU Clock (MHz) | Average CPU Temperature (°C) | |
| System Idle | -- | -- | 55 |
| Prime95 Stress | 2.1 | -- | 74 |
| Prime95 + FurMark Stress | 1.3 | 1350 | 82 |
| Cyberpunk 2077 Stress | 0.6 | 2150 | 69 |
System Performance
PCMark scores are much higher than on last year's Yoga Book 9 13 due largely to the new integrated Arc 140T GPU which runs laps around the Iris Xe 96 EUs.
PCMark 10: Score | Essentials | Productivity | Digital Content Creation
CrossMark: Overall | Productivity | Creativity | Responsiveness
WebXPRT 3: Overall
WebXPRT 4: Overall
Mozilla Kraken 1.1: Total
| Performance Rating | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T | |
| Asus ZenBook Duo OLED UX8406CA | |
| Dell Latitude 7450 2-in-1 | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| PCMark 10 / Score | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (7519 - 7865, n=5) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| PCMark 10 / Essentials | |
| Lenovo Yoga Book 9 14IAH10 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (10666 - 11556, n=5) | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| PCMark 10 / Productivity | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (9171 - 9716, n=5) | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| PCMark 10 / Digital Content Creation | |
| Asus ZenBook Duo OLED UX8406CA | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (11134 - 12456, n=5) | |
| Lenovo Yoga Book 9 14IAH10 | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| CrossMark / Overall | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (1665 - 2018, n=6) | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| CrossMark / Productivity | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (1566 - 1862, n=6) | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| CrossMark / Creativity | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (1891 - 2396, n=6) | |
| Asus ZenBook Duo OLED UX8406CA | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| CrossMark / Responsiveness | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (1367 - 1723, n=6) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9 13IMU9 | |
| WebXPRT 3 / Overall | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (302 - 327, n=4) | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 13IMU9 | |
| HP EliteBook X Flip G1i 14 AI | |
| WebXPRT 4 / Overall | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (291 - 317, n=6) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| HP EliteBook X Flip G1i 14 AI | |
| Mozilla Kraken 1.1 / Total | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP EliteBook X Flip G1i 14 AI | |
| Asus ZenBook Duo OLED UX8406CA | |
| Average Intel Core Ultra 7 255H, Intel Arc Graphics 140T (427 - 455, n=6) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Dell Latitude 7450 2-in-1 | |
* ... smaller is better
| PCMark 10 Score | 7666 points | |
Help | ||
| AIDA64 / Memory Copy | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H (76316 - 108302, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| AIDA64 / Memory Read | |
| HP EliteBook X Flip G1i 14 AI | |
| Average Intel Core Ultra 7 255H (78333 - 90552, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Dell Latitude 7450 2-in-1 | |
| AIDA64 / Memory Write | |
| HP EliteBook X Flip G1i 14 AI | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 14IAH10 | |
| Average Intel Core Ultra 7 255H (61787 - 82641, n=7) | |
| Asus ZenBook Duo OLED UX8406CA | |
| Lenovo Yoga Book 9 13IMU9 | |
| Dell Latitude 7450 2-in-1 | |
| AIDA64 / Memory Latency | |
| Dell Latitude 7450 2-in-1 | |
| Lenovo Yoga Book 9 13IMU9 | |
| Asus ZenBook Duo OLED UX8406CA | |
| Average Intel Core Ultra 7 255H (110.1 - 147.2, n=7) | |
| Lenovo Yoga Book 9 14IAH10 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| HP EliteBook X Flip G1i 14 AI | |
* ... smaller is better
DPC Latency
| DPC Latencies / LatencyMon - interrupt to process latency (max), Web, Youtube, Prime95 | |
| Lenovo Yoga Book 9 14IAH10 | |
| Lenovo Yoga Book 9i 2-in-1 Dual Screen | |
| Lenovo Yoga Book 9 13IMU9 | |
| HP EliteBook X Flip G1i 14 AI | |
| Dell Latitude 7450 2-in-1 | |
| Asus ZenBook Duo OLED UX8406CA | |
* ... smaller is better
Storage Devices
The Samsung drive exhibits performance throttling issues when running our DiskSpd read loop test as shown by the graph below. Transfer rates would cycle between 2600 MB/s and 6000 MB/s after just a minute into the test.
* ... smaller is better
Disk Throttling: DiskSpd Read Loop, Queue Depth 8
GPU Performance
Graphics performance with the Arc 140T is excellent and comparable to the standard Arc 140V on many Lunar Lake laptops. It is a significant upgrade over the Arc 4 in last year's model by over when rendering in Blender or when playing DX12 games.
| Power Profile | Graphics Score | Physics Score | Combined Score |
| Performance mode | 8697 | 29389 | 3195 |
| Balanced mode | 8654 (-0%) | 31023 (+6%) | 3262 (+2%) |
| Battery Power | 8667 (-0%) | 29953 (+2%) | 3232 (+1%) |
| 3DMark 11 Performance | 12521 points | |
| 3DMark Cloud Gate Standard Score | 36844 points | |
| 3DMark Fire Strike Score | 8153 points | |
| 3DMark Time Spy Score | 4421 points | |
Help | ||
* ... smaller is better
Cyberpunk 2077 ultra FPS Chart
| low | med. | high | ultra | |
|---|---|---|---|---|
| Dota 2 Reborn (2015) | 103.5 | 68.8 | 53.6 | 80.1 |
| Final Fantasy XV Benchmark (2018) | 72.9 | 42 | 27.9 | |
| X-Plane 11.11 (2018) | 53.1 | 43.2 | 38.1 | |
| Strange Brigade (2018) | 160.5 | 61.6 | 56.6 | 48.6 |
| Baldur's Gate 3 (2023) | 35.6 | 28.4 | 25.3 | 24.8 |
| Cyberpunk 2077 2.2 Phantom Liberty (2023) | 37.3 | 30.4 | 26.6 | 24.5 |
| F1 24 (2024) | 76 | 69.4 |
Emissions
System Noise
Fan noise is louder than last year's model by a noticeable margin due to the faster and more demanding Core H-series CPU. The internal fans ramp up more quickly when higher loads are introduced as well.
Noise Level
| Idle |
| 23.9 / 23.9 / 23.9 dB(A) |
| HDD |
| 25.9 dB(A) |
| Load |
| 39.1 / 44.5 dB(A) |
 | ||
30 dB silent 40 dB(A) audible 50 dB(A) loud |
||
min:  , med:  , max:  Earthworks M23R, Arta (15 cm distance) environment noise: 23.9 dB(A) | ||
| Lenovo Yoga Book 9 14IAH10 Arc 140T, Ultra 7 255H, Samsung PM9C1a MZAL81T0HDLB | 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 | HP EliteBook X Flip G1i 14 AI Arc 140V, Core Ultra 7 258V, Western Digital PC SN5000S SDEPNSJ-1T00-1006 | Dell Latitude 7450 2-in-1 Graphics 4-Core, Ultra 7 165U, Micron 2550 512GB | Asus ZenBook Duo OLED UX8406CA Arc 140T, Ultra 9 285H, Western Digital PC SN5000S SDEQNSJ-1T00 | |
|---|---|---|---|---|---|---|
| Noise | 13% | 5% | 14% | 5% | 3% | |
| off / environment * | 23.9 | 23.3 3% | 22.6 5% | 23 4% | 23.03 4% | 23.6 1% |
| Idle Minimum * | 23.9 | 23.3 3% | 23.1 3% | 23 4% | 23.53 2% | 23.6 1% |
| Idle Average * | 23.9 | 23.3 3% | 23.1 3% | 23 4% | 23.53 2% | 23.6 1% |
| Idle Maximum * | 23.9 | 24.6 -3% | 23.1 3% | 23 4% | 23.53 2% | 23.6 1% |
| Load Average * | 39.1 | 26.2 33% | 38.6 1% | 27.14 31% | 38.54 1% | 39.8 -2% |
| Cyberpunk 2077 ultra * | 42 | 31.65 25% | 38.2 9% | 39.8 5% | ||
| Load Maximum * | 44.5 | 27.3 39% | 38.3 14% | 31.65 29% | 38.21 14% | 39.8 11% |
| Witcher 3 ultra * | 27.3 | 34.2 |
* ... smaller is better
Temperature
Hot spots reach just over 38 C on both sides of the base which is not unlike on most typical clamshells or convertibles with only a single screen. In other words, the system doesn't feel noticeably warmer despite its unique design.
(+) The maximum temperature on the upper side is 38.2 °C / 101 F, compared to the average of 35.4 °C / 96 F, ranging from 19.6 to 60 °C for the class Convertible.
(+) The bottom heats up to a maximum of 38.8 °C / 102 F, compared to the average of 36.8 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 29.1 °C / 84 F, compared to the device average of 30.3 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 30.6 °C / 87.1 F and are therefore cool to the touch.
(-) The average temperature of the palmrest area of similar devices was 27.9 °C / 82.2 F (-2.7 °C / -4.9 F).
| Lenovo Yoga Book 9 14IAH10 Intel Core Ultra 7 255H, Intel Arc Graphics 140T | Lenovo Yoga Book 9 13IMU9 Intel Core Ultra 7 155U, Intel Graphics 4-Core iGPU (Arc) | Lenovo Yoga Book 9i 2-in-1 Dual Screen Intel Core i7-1355U, Intel Iris Xe Graphics G7 96EUs | HP EliteBook X Flip G1i 14 AI Intel Core Ultra 7 258V, Intel Arc Graphics 140V | Dell Latitude 7450 2-in-1 Intel Core Ultra 7 165U, Intel Graphics 4-Core iGPU (Arc) | Asus ZenBook Duo OLED UX8406CA Intel Core Ultra 9 285H, Intel Arc Graphics 140T | |
|---|---|---|---|---|---|---|
| Heat | -0% | 5% | 10% | 4% | 8% | |
| Maximum Upper Side * | 38.2 | 39.2 -3% | 37 3% | 36 6% | 41.2 -8% | 35.3 8% |
| Maximum Bottom * | 38.8 | 41 -6% | 37.2 4% | 41 -6% | 45 -16% | 47.2 -22% |
| Idle Upper Side * | 32.6 | 32.2 1% | 31.4 4% | 26 20% | 27.2 17% | 24.8 24% |
| Idle Bottom * | 33.8 | 31.6 7% | 31.6 7% | 27 20% | 26.2 22% | 26.2 22% |
* ... smaller is better
Speakers
Lenovo Yoga Book 9 14IAH10 audio analysis
(+) | speakers can play relatively loud (83.8 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 9.7% lower than median
(±) | linearity of bass is average (9.7% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 5.2% higher than median
(+) | mids are linear (4.3% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 3.4% away from median
(+) | highs are linear (4% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (11.5% difference to median)
Compared to same class
» 9% of all tested devices in this class were better, 3% similar, 88% worse
» The best had a delta of 6%, average was 20%, worst was 57%
Compared to all devices tested
» 7% of all tested devices were better, 2% similar, 91% worse
» The best had a delta of 4%, average was 24%, 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 24%, worst was 134%
Energy Management
Power Consumption
Overall consumption is higher than on the 2024 Yoga Book 9i due to the larger screen and the switch from a Core U-series CPU to a faster Core H-series one. Battery life is negatively affected as a result.
| Off / Standby | 0.17 / 0.65 Watt |
| Idle | 9.9 / 11.6 / 23.2 Watt |
| Load |
58.5 / 70.1 Watt |
   
| |
Key:
min: ,
med: ,
max: Metrahit Energy | |
| Lenovo Yoga Book 9 14IAH10 Ultra 7 255H, Arc 140T, Samsung PM9C1a MZAL81T0HDLB, OLED, 2880x1800, 14" | Lenovo Yoga Book 9 13IMU9 Ultra 7 155U, Graphics 4-Core, , OLED, 2880x1800, 13.3" | Lenovo Yoga Book 9i 2-in-1 Dual Screen i7-1355U, Iris Xe G7 96EUs, WD PC SN740 512GB SDDPMQD-512G-1101, OLED, 2880x1800, 13.3" | HP EliteBook X Flip G1i 14 AI Core Ultra 7 258V, Arc 140V, Western Digital PC SN5000S SDEPNSJ-1T00-1006, IPS, 1920x1200, 14" | Dell Latitude 7450 2-in-1 Ultra 7 165U, Graphics 4-Core, Micron 2550 512GB, IPS, 1920x1200, 14" | Asus ZenBook Duo OLED UX8406CA Ultra 9 285H, Arc 140T, Western Digital PC SN5000S SDEQNSJ-1T00, OLED, 1920x1200, 14" | |
|---|---|---|---|---|---|---|
| Power Consumption | 18% | 10% | 37% | 43% | 28% | |
| Idle Minimum * | 9.9 | 7.1 28% | 6.9 30% | 2.9 71% | 2.23 77% | 4.1 59% |
| Idle Average * | 11.6 | 9.1 22% | 11.6 -0% | 8.2 29% | 5.36 54% | 8.2 29% |
| Idle Maximum * | 23.2 | 18.4 21% | 20.8 10% | 8.6 63% | 6.8 71% | 8.7 62% |
| Load Average * | 58.5 | 51.3 12% | 55 6% | 39.6 32% | 51.2 12% | 56.7 3% |
| Cyberpunk 2077 ultra external monitor * | 56.6 | 36.4 36% | 34.6 39% | 47 17% | ||
| Cyberpunk 2077 ultra * | 58.5 | 41.9 28% | 29.5 50% | 48.7 17% | ||
| Load Maximum * | 70.1 | 65.5 7% | 68.1 3% | 70 -0% | 69.9 -0% | 65.1 7% |
| Witcher 3 ultra * | 41.5 | 44.9 |
* ... smaller is better
Power Consumption Cyberpunk / Stress Test
Power Consumption external Monitor
Battery Life
WLAN runtime can be as short as 6 hours if both screens are active. Although battery capacity is larger than on last year's model by 10 percent (88 Wh vs. 80 Wh), the increase isn't enough to make up for the more demanding hardware.
| Lenovo Yoga Book 9 14IAH10 Ultra 7 255H, Arc 140T, 88 Wh | 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 | HP EliteBook X Flip G1i 14 AI Core Ultra 7 258V, Arc 140V, 68 Wh | Dell Latitude 7450 2-in-1 Ultra 7 165U, Graphics 4-Core, 57 Wh | Asus ZenBook Duo OLED UX8406CA Ultra 9 285H, Arc 140T, 75 Wh | |
|---|---|---|---|---|---|---|
| Battery Runtime | 66% | 60% | 200% | 80% | 82% | |
| WiFi v1.3 | 367 | 608 66% | 586 60% | 1102 200% | 660 80% | 667 82% |
| Reader / Idle | 680 | |||||
| Load | 219 | 128 | ||||
| H.264 | 1234 | 741 | 1015 |
Notebookcheck Rating
Lenovo Yoga Book 9 14IAH10
- 06/04/2025 v8
Allen Ngo
Total Sustainability Score: Potential Competitors in Comparison
Image | Model / Review | Price | Weight | Height | Display |
|---|---|---|---|---|---|
1. 83.4%  | Lenovo Yoga Book 9 14IAH10 Intel Core Ultra 7 255H ⎘ Intel Arc Graphics 140T ⎘ 16 GB Memory, 1024 GB SSD | Amazon: $2,699.00 | 1.2 kg | 15.5 mm | 14.00" 2880x1800 243 PPI OLED |
2. 87% v7 (old)  | Lenovo Yoga Book 9 13IMU9 Intel Core Ultra 7 155U ⎘ Intel Graphics 4-Core iGPU (Arc) ⎘ 16 GB Memory | Amazon: $1,699.00 List Price: 2000 USD | 1.4 kg | 15.95 mm | 13.30" 2880x1800 255 PPI OLED |
3. 86.4% v7 (old)  | Lenovo Yoga Book 9i 2-in-1 Dual Screen Intel Core i7-1355U ⎘ Intel Iris Xe Graphics G7 96EUs ⎘ 16 GB Memory, 512 GB SSD | Amazon: $1,699.00 List Price: 2000 USD | 1.6 kg | 15.95 mm | 13.30" 2880x1800 255 PPI OLED |
4. 89.9%  | HP EliteBook X Flip G1i 14 AI Intel Core Ultra 7 258V ⎘ Intel Arc Graphics 140V ⎘ 32 GB Memory, 1000 GB SSD | Amazon: $2,046.91 List Price: 2889 Euro | 1.5 kg | 14.7 mm | 14.00" 1920x1200 162 PPI IPS |
5. 87.7%  | Dell Latitude 7450 2-in-1 Intel Core Ultra 7 165U ⎘ Intel Graphics 4-Core iGPU (Arc) ⎘ 32 GB Memory, 512 GB SSD | Amazon: $1,295.00 List Price: 2279 USD | 1.5 kg | 17.1 mm | 14.00" 1920x1200 162 PPI IPS |
6. 86.5%  | Asus ZenBook Duo OLED UX8406CA Intel Core Ultra 9 285H ⎘ Intel Arc Graphics 140T ⎘ 32 GB Memory, 1024 GB SSD | Amazon: $1,799.99 List Price: 2099€ | 1.8 kg | 19.9 mm | 14.00" 1920x1200 162 PPI OLED |
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The selection of devices to be reviewed is made by our editorial team. The test sample was provided to the author as a loan by the manufacturer or retailer for the purpose of this 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. We never accept compensation or payment in return for our reviews. As an independent media company, Notebookcheck is not subjected to the authority of manufacturers, retailers or publishers.
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