Notebookcheck Logo

Lenovo Yoga Book 9 14 Arrow Lake CPU throttling is a bit steeper than we would like

Users may want to skip the Core Ultra 9 configuration as throttling already occurs on the slower Core Ultra 7 option (Image source: Lenovo)
Users may want to skip the Core Ultra 9 configuration as throttling already occurs on the slower Core Ultra 7 option (Image source: Lenovo)
The 2025 Yoga Book 9 14 addresses one of the main complaints about the series by swapping out the slow Intel U-series processors for much faster H-series options. In practice, however, performance could still be a little better.

The new Yoga Book 9 14 is now shipping with the latest Intel Arrow Lake Core Ultra 7 255H CPU in direct contrast to the original Yoga Book 9 13 which only offered Core U-series options. The newer CPU can be up to 2x faster than the Core Ultra 7 155U in the older 13-inch model while the difference can be even greater when it comes to graphics performance.

"Up to" is the keyword, however, as the H-series CPU may be too much for the Yoga Book 9 14 to handle as detailed in our review. When running CineBench R15 xT in a loop, for example, processor performance can drop by as much as 25 percent over time likely due to limited Turbo Boost sustainability or temperature ceilings whereas the older 13-inch Yoga Book 9 would exhibit almost no throttling at all under similar conditions. The Xiaomi RedmiBook Pro 14, which carries the same CPU as the Yoga Book 9 14, would throttle less than our Yoga Book 9 14 as well as shown by the graph below.

The throttling on our Core Ultra 7 255H configuration suggests that the same is very likely to occur on the more expensive Core Ultra 9 285H configuration, too. Interested users should therefore consider skipping the pricier Core Ultra 9 option as the performance delta between the two SKUs is likely to be extremely small. Even so, the Yoga Book 9 14 still handily outperforms its predecessors by wide margins regardless of any throttling.

Cinebench R15 Multi Loop

01653304956608259901155132014851650181519802145231024752640280529703135Tooltip
Lenovo Yoga Book 9 14IAH10 Intel Core Ultra 7 255H: Ø2165 (2075.66-2834.87)
Lenovo Yoga Book 9 13IMU9 Intel Core Ultra 7 155U: Ø1322 (1278.32-1504.72)
Lenovo Yoga Book 9i 2-in-1 Dual Screen Intel Core i7-1355U: Ø1153 (695.41-1206.27)
Xiaomi RedmiBook Pro 14 2025 Intel Core Ultra 7 255H: Ø2804 (2606.37-3290.83)
CPU Performance Rating: Percent
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
CPU Performance Rating
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
85.4 pt
Average Intel Core Ultra 7 255H
 
79.7 pt
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
79.5 pt
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
51.6 pt
Lenovo Yoga Book 9i 2-in-1 Dual Screen -2!
Intel Core i7-1355U
50.7 pt
Cinebench R23 / Multi Core
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
20022 Points +12%
Average Intel Core Ultra 7 255H
  (16931 - 22578, n=8)
18554 Points +4%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
17878 (14381.2min - 17878.1max) Points
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
9385 (8670.97min - 9384.63max) Points -48%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
9222 (7579.11min - 9221.84max) Points -48%
Cinebench R23 / Single Core
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
2152 Points +2%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
2111 Points
Average Intel Core Ultra 7 255H
  (2047 - 2152, n=8)
2088 Points -1%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
1825 Points -14%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
1675 Points -21%
Cinebench R20 / CPU (Multi Core)
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
7884 Points +12%
Average Intel Core Ultra 7 255H
  (6600 - 8860, n=7)
7346 Points +5%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
7015 Points
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
3613 Points -48%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
3522 Points -50%
Cinebench R20 / CPU (Single Core)
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
826 Points +2%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
811 Points
Average Intel Core Ultra 7 255H
  (786 - 826, n=7)
803 Points -1%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
702 Points -13%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
646 Points -20%
Cinebench R15 / CPU Multi 64Bit
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
3291 (2606.37min - 3290.83max) Points +16%
Average Intel Core Ultra 7 255H
  (2539 - 3444, n=7)
2941 Points +4%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
2835 (2075.66min - 2834.87max) Points
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
1505 (1278.32min - 1504.72max) Points -47%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
1206 (695.41min - 1206.27max) Points -57%
Cinebench R15 / CPU Single 64Bit
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
322 Points +2%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
317 Points
Average Intel Core Ultra 7 255H
  (258 - 322, n=7)
306 Points -3%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
264 Points -17%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
230 Points -27%
Blender / v2.79 BMW27 CPU
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
380 Seconds * -76%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
353 Seconds * -63%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
216 Seconds *
Average Intel Core Ultra 7 255H
  (157 - 242, n=7)
196.7 Seconds * +9%
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
178 Seconds * +18%
7-Zip 18.03 / 7z b 4
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
66152 MIPS +16%
Average Intel Core Ultra 7 255H
  (47892 - 68627, n=8)
59040 MIPS +4%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
56787 MIPS
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
38645 MIPS -32%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
37621 MIPS -34%
7-Zip 18.03 / 7z b 4 -mmt1
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
6169 MIPS +2%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
6063 MIPS
Average Intel Core Ultra 7 255H
  (4589 - 6169, n=8)
5839 MIPS -4%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
5457 MIPS -10%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
4855 MIPS -20%
Geekbench 6.4 / Multi-Core
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
17489 Points +13%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
15456 Points
Average Intel Core Ultra 7 255H
  (12250 - 17489, n=8)
15453 Points 0%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
9448 Points -39%
Geekbench 6.4 / Single-Core
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
2923 Points +1%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
2894 Points
Average Intel Core Ultra 7 255H
  (2858 - 2925, n=8)
2889 Points 0%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
2324 Points -20%
Geekbench 5.5 / Multi-Core
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
17218 Points +16%
Average Intel Core Ultra 7 255H
  (13794 - 17218, n=7)
15108 Points +2%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
14856 Points
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
8409 Points -43%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
8073 Points -46%
Geekbench 5.5 / Single-Core
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
2112 Points 0%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
2103 Points
Average Intel Core Ultra 7 255H
  (1980 - 2121, n=7)
2079 Points -1%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
1822 Points -13%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
1691 Points -20%
HWBOT x265 Benchmark v2.2 / 4k Preset
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
23.2 fps +13%
Average Intel Core Ultra 7 255H
  (16.2 - 25.8, n=7)
21.4 fps +4%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
20.5 fps
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
10.7 fps -48%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
10 fps -51%
LibreOffice / 20 Documents To PDF
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
47.7 s * -10%
Average Intel Core Ultra 7 255H
  (41.3 - 61.6, n=7)
47.1 s * -9%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
46.8 s * -8%
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
44.3 s * -3%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
43.2 s *
R Benchmark 2.5 / Overall mean
Lenovo Yoga Book 9 13IMU9
Intel Core Ultra 7 155U
0.508 sec * -17%
Lenovo Yoga Book 9i 2-in-1 Dual Screen
Intel Core i7-1355U
0.4711 sec * -9%
Average Intel Core Ultra 7 255H
  (0.4233 - 0.515, n=7)
0.4449 sec * -2%
Xiaomi RedmiBook Pro 14 2025
Intel Core Ultra 7 255H
0.4378 sec * -1%
Lenovo Yoga Book 9 14IAH10
Intel Core Ultra 7 255H
0.4341 sec *

* ... smaller is better

static version load dynamic
Loading Comments
Comment on this article
Please share our article, every link counts!
Mail Logo
> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2025 06 > Lenovo Yoga Book 9 14 Arrow Lake CPU throttling is a bit steeper than we would like
Allen Ngo, 2025-06- 7 (Update: 2025-06- 5)