Intel Core i7-1255U
The Intel Core i7-1255U is a high-end mobile CPU for thin and light laptops based on the Alder Lake architecture. It was announced in early 2022 and offers 2 performance cores (P-cores, Golden Cove architecture) and 8 efficient cores (E-cores, Gracemont architecture). The P-cores support Hyper-Threading leading to 12 supported threads when combined with the E-cores. The clock rate ranges from 1.7 to 4.7 GHz on the performance cluster and 1.2 to 3.5 GHz on the efficient cluster. The performance of the E-cores should be similar to old Skylake cores (compare to the Core i7-6700HQ ). All cores can use up to 12 MB L3 cache. Compared to the i7-1265U (fastest U-series CPU at launch), the 1255 offers 100 MHz lower clocked CPU cores and only "Essentials" vPro management features. Compared to the P-series (28W) or H-series (45W), the 15W TDP may limit the sustained performance.
Performance
Thanks to the 10 cores, the multi-threaded performance should be clearly faster than the older quad-core Tiger Lake CPUs with 15 Watt (like the Intel Core i7-1160G7 ). The sustained performance will be limited by the TDP setting and thermals and therefore only short term loads. Thanks to the architectural improvements of the big Golden Cove cores, the single thread performance should be better than similar clocked Tiger Lake CPUs.
Architecture
The integrated memory controller supports various memory types up to DDR5-4800, DDR4-3200, LPDDR5-5200, and LPDDR4x-4267. The Thread Director (in hardware) can support the operating system to decide which thread to use on the performance or efficient cores for the best performance. For AI tasks, the CPU also integrates GNA 3.0 and DL Boost (via AVX2). Quick Sync in version 8 is the same as in the Rocket Lake CPUs and supports MPEG-2, AVC, VC-1 decode, JPEG, VP8 decode, VP9, HEVC, and AV1 decode in hardware. The CPU only supports PCIe 4.0 (x8 for a GPU and two x4 for SSDs).
The integrated graphics card is based on the Xe-architecture and offers all 96 EUs (Execution Units) operating at up to 1.25 GHz.
Power consumption
This Core i7 has a "minimum assured" power consumption of 12 W. Its Base power consumption sits at 15 W and its maximum Intel-recommended Turbo power consumption isn't supposed to exceed 55 W. All those values are too high to allow for pasisvely cooled designs.
Last but not the least, Core i7-1255U is built with Intel's third-gen 10 nm process marketed as Intel 7 for decent, as of late 2022, energy efficiency.
Series Intel Alder Lake-M Codename Alder Lake-U Series: Alder Lake-M Alder Lake-U Clock Rate 1200 - 4700 MHz Level 1 Cache 928 KB Level 2 Cache 9.5 MB Level 3 Cache 12 MB Number of Cores / Threads 10 / 12 Power Consumption (TDP = Thermal Design Power) 15 Watt Manufacturing Technology 10 nm Max. Temperature 100 °C Socket BGA1744 Features Thread Director GPU Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz)64 Bit 64 Bit support Architecture x86 Announcement Date 01/04/2022 Product Link (external) Intel Alder Lake-M i7-1255U
Benchmarks Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU
39.9 pt (58%)
...
...
Cinebench R23 - Cinebench R23 Multi Core
min: 5269 avg: 8198 median: 8332 (14%) max: 9628 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 86% 98% 90% 100% 96% 100%
...
...
Cinebench R23 - Cinebench R23 Single Core
min: 1425 avg: 1649 median: 1656 (73%) max: 1775 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 86% 98% 95% 93% 100% 94%
...
...
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 550 avg: 635 median: 638 (73%) max: 682 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 88% 99% 96% 95% 100% 95%
...
...
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 2095 avg: 3116 median: 3131 (13%) max: 3702 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 87% 97% 89% 90% 94% 100%
...
...
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 919 avg: 1365 median: 1400 (14%) max: 1577 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 77% 89% 90% 90% 92% 100%
...
...
0 80 160 240 320 400 480 560 640 720 800 880 960 1040 1120 1200 1280 1360 1440 1520 Tooltip HP ProBook 450 G9 6A180EA @Default (15W PL1): Ø811 (792.19-919)
Dell Inspiron 14 7420 2-in-1: Ø1118 (1067.98-1158.61)
HP ProBook 440 G9-5Y3Z3EA: Ø1166 (1136.78-1371.84)
Lenovo IdeaPad Flex 7i 14IAU7: Ø1099 (1057.61-1376.89)
HP Spectre x360 13.5 14t-ef000: Ø1377 (1342.78-1400.12)
HP Envy 17-cr0079ng: Ø1368 (1336.72-1422.22)
Acer Aspire Vero AV14-51-72DL: Ø1311 (1297.9-1479.1)
Microsoft Surface Pro 9, i7-1255U: Ø1293 (1168.77-1576.35)
Microsoft Surface Laptop 5 15, i7-1255U: Ø1257 (1212.27-1577.22)
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 161 avg: 229.4 median: 238.5 (73%) max: 251 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 92% 95% 80% 96% 100% 95%
...
...
7-Zip 18.03 - 7-Zip 18.03 Multli Thread 4 runs
min: 24126 avg: 34066 median: 36825 (23%) max: 37365 MIPS
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 82% 90% 81% 98% 100% 100%
...
...
7-Zip 18.03 - 7-Zip 18.03 Single Thread 4 runs
min: 5150 avg: 5308 median: 5256 (63%) max: 5529 MIPS
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 97% 98% 95% 96% 100% 96%
...
...
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
min: 6.31 avg: 9.2 median: 9.7 (21%) max: 10.1 fps
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 81% 95% 86% 100% 100% 99%
...
...
0 5 10 15 20 Tooltip HP ProBook 450 G9 6A180EA: Ø7.16 (0.98-16.9)
HP ProBook 440 G9-5Y3Z3EA: Ø9.41 (0.91-16.8)
Dell Inspiron 14 7420 2-in-1: Ø9.66 (1.08-18.2)
Acer Aspire Vero AV14-51-72DL: Ø10 (0.29-13.5)
HP Envy 17-cr0079ng: Ø10.5 (0.94-18.4)
HP Spectre x360 13.5 14t-ef000: Ø10.6 (1.33-21.4)
Lenovo IdeaPad Flex 7i 14IAU7: Ø11 (1.22-20.8)
Microsoft Surface Laptop 5 15, i7-1255U: Ø11.2 (1.16-20.6)
Microsoft Surface Pro 9, i7-1255U: Ø10.7 (0.31-13.6)
Blender - Blender 3.3 Classroom CPU *
min: 683 avg: 772 median: 723 (9%) max: 1156 Seconds
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 100% 103% 103% 103% 103% 103%
...
...
Blender - Blender 2.79 BMW27 CPU *
min: 372 avg: 419.7 median: 383 (3%) max: 601 Seconds
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 100% 101% 101% 101% 101% 101%
...
...
R Benchmark 2.5 - R Benchmark 2.5 *
min: 0.4688 avg: 0.5 median: 0.5 (11%) max: 0.558 sec
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 100% 101% 100% 101% 101% 101%
...
...
3DMark 11 - 3DM11 Performance Physics
min: 8097 avg: 14121 median: 15314 (41%) max: 16890 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 71% 87% 66% 99% 88% 100%
...
...
3DMark - 3DMark Cloud Gate Physics
min: 7665 avg: 10433 median: 10520 (27%) max: 12522 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 73% 79% 80% 88% 91% 100%
...
...
3DMark - 3DMark Fire Strike Standard Physics
min: 11482 avg: 17380 median: 18157 (33%) max: 20193 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 78% 91% 84% 93% 90% 100%
...
...
3DMark - 3DMark Time Spy CPU
min: 1124 avg: 5468 median: 6140 (30%) max: 7649 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 73% 97% 17% 93% 100% 99%
...
...
Geekbench 5.2 - 5.5 - Geekbench 5.1 - 5.4 64 Bit Single-Core
min: 1560 avg: 1640 median: 1650.5 (71%) max: 1712 points
CPU TDP ? TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 91% 98% 98% 91% 96% 100% 94%
...
...
Geekbench 5.2 - 5.5 - Geekbench 5.1 - 5.4 64 Bit Multi-Core
min: 4463 avg: 7315 median: 7989.5 (28%) max: 8821 points
CPU TDP ? TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 52% 78% 91% 72% 100% 94% 97%
...
...
Geekbench 5.0 - Geekbench 5.0 64 Bit Single-Core
min: 1523 avg: 1607 median: 1610.5 (7%) max: 1684 points
CPU TDP 15 W TDP 23 W TDP 25 W TDP 28 W 93% 90% 98% 100%
...
...
Geekbench 5.0 - Geekbench 5.0 64 Bit Multi-Core
min: 4557 avg: 6900 median: 7294.5 (23%) max: 8452 points
CPU TDP 15 W TDP 23 W TDP 25 W TDP 28 W 54% 75% 100% 98%
...
...
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
min: 476.2 avg: 586 median: 571 (1%) max: 727 ms
CPU TDP ? TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 100% 100% 100% 100% 100% 100% 100%
...
...
Sunspider - Sunspider 1.0 Total Score *
97.3 ms (1%)
...
...
Octane V2 - Octane V2 Total Score
min: 75963 avg: 82625 median: 82948 (76%) max: 88687 Points
CPU TDP ? TDP 15 W TDP 23 W TDP 30 W 100% 86% 93% 94%
...
...
WebXPRT 4 - WebXPRT 4 Score
min: 183.4 avg: 230 median: 232 (69%) max: 249 Points
CPU TDP ? TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 100% 85% 92% 92% 94% 97% 93%
...
...
WebXPRT 3 - WebXPRT 3 Score
min: 200 avg: 274.6 median: 275 (57%) max: 366 Points
CPU TDP ? TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 100% 65% 75% 72% 75% 78% 73%
...
...
PCMark for Android - PCM f. Android Storage 2.0 score
9895 Points (19%)
PCMark for Android - PCM f. Android Work Score 3.0
11617 Points (41%)
CrossMark - CrossMark Overall
min: 1329 avg: 1461 median: 1475 (57%) max: 1573 Points
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 87% 94% 85% 94% 100% 98%
...
...
CrXPRT 2 - CrXPRT2 Performance Score
173 Points (96%)
Power Consumption - Prime95 Power Consumption - external Monitor *
min: 24.3 avg: 43.1 median: 44 (8%) max: 51.2 Watt
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 103% 102% 102% 100% 100% 101%
...
...
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Tooltip HP ProBook 450 G9 6A180EA: Ø24.2 (22.8-46.9)
HP ProBook 440 G9-5Y3Z3EA: Ø39.4 (36.1-65)
Dell Inspiron 14 7420 2-in-1: Ø41.8 (37.5-59.5)
Acer Aspire Vero AV14-51-72DL: Ø40.1 (39.5-41.4)
HP Envy 17-cr0079ng: Ø45.8 (0.09763-82.9)
Lenovo IdeaPad Flex 7i 14IAU7: Ø49.5 (43.7-70.9)
HP Spectre x360 13.5 14t-ef000: Ø50.2 (46.9-65.2)
Microsoft Surface Laptop 5 15, i7-1255U: Ø51.2 (44.9-64.8)
Power Consumption - Cinebench R15 Multi Power Consumption - external Monitor *
min: 27.8 avg: 56.4 median: 55.6 (12%) max: 75.9 Watt
CPU TDP 15 W TDP 23 W TDP 24 W TDP 25 W TDP 28 W TDP 30 W 103% 101% 102% 102% 103% 100%
...
...
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Tooltip HP ProBook 450 G9 6A180EA: Ø27.6 (22.1-47)
HP Spectre x360 13.5 14t-ef000: Ø50.4 (43.9-65.2)
Dell Inspiron 14 7420 2-in-1: Ø51.6 (37.2-57.3)
Lenovo IdeaPad Flex 7i 14IAU7: Ø53.4 (36.6-70.8)
HP ProBook 440 G9-5Y3Z3EA: Ø55.6 (35.9-65.2)
Acer Aspire Vero AV14-51-72DL: Ø59.4 (49.6-68.3)
Microsoft Surface Laptop 5 15, i7-1255U: Ø65.8 (45-71.1)
Microsoft Surface Pro 9, i7-1255U: Ø67.9 (67.2-68.5)
HP Envy 17-cr0079ng: Ø76.8 (51.9-82.5)
Power Consumption - Idle Power Consumption - external Monitor *
min: 4.09 avg: 6.5 median: 6.2 (5%) max: 11.6 Watt
CPU TDP ? TDP 15 W TDP 24 W TDP 25 W TDP 30 W 104% 100% 104% 102% 103%
...
...
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Tooltip Asus Chromebook Flip CX5 CX5601FB: Ø4.09 (3.57-5.47)
HP ProBook 440 G9-5Y3Z3EA: Ø4.79 (4.12-9.15)
Acer Aspire Vero AV14-51-72DL: Ø5.05 (3.38-14.8)
HP Envy 17-cr0079ng: Ø6.19 (4.97-9.89)
Microsoft Surface Laptop 5 15, i7-1255U: Ø6.69 (5.89-7.84)
Lenovo IdeaPad Flex 7i 14IAU7: Ø6.83 (6.29-8.4)
HP ProBook 450 G9 6A180EA: Ø11.6 (10.1-13.8)
Power Consumption - Idle Power Consumption 150cd 1min *
min: 3.55 avg: 9.4 median: 6.4 (8%) max: 30.7 Watt
CPU TDP ? TDP 15 W TDP 24 W TDP 25 W TDP 30 W 114% 100% 113% 109% 115%
...
...
0 5 10 15 20 25 30 35 40 45 Tooltip Acer Aspire Vero AV14-51-72DL: Ø3.55 (2.1-8.67)
Asus Chromebook Flip CX5 CX5601FB: Ø5.37 (4.78-6.7)
HP ProBook 450 G9 6A180EA: Ø5.49 (4.86-9.56)
HP ProBook 450 G9 6A180EA: Ø30.7 (29.1-47.1)
HP ProBook 440 G9-5Y3Z3EA: Ø6.3 (5.7-8.55)
Microsoft Surface Laptop 5 15, i7-1255U: Ø6.56 (4.76-14.6)
HP Envy 17-cr0079ng: Ø8.65 (7.86-11.5)
Lenovo IdeaPad Flex 7i 14IAU7: Ø8.68 (8.18-10.2)
Power Consumption - Cinebench R15 Multi Power Efficiency - external Monitor
min: 18.7 avg: 25 median: 24.5 (18%) max: 33.1 Points per Watt
CPU TDP 15 W TDP 23 W TDP 25 W TDP 28 W TDP 30 W 93% 82% 93% 100% 88%
...
...
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance