CPU comparison with benchmarks
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CPU lineage |
Intel Core i7-1255U or Intel Core i7-1255U – which processor offers superior performance? In this comparison, we examine disparities and assess which of these two CPUs outperforms the other. We delve into technical specifications and benchmark outcomes. The Intel Core i7-1255U features 10 processor cores and has the capability to manage 12 threads concurrently. It was released in Q1/2022 and belongs to the 12 generation of the Intel Core i7 series. To use the Intel Core i7-1255U, you'll need a motherboard with a BGA 1744 socket. The Intel Core i7-1355U features 10 processor cores and has the capability to manage 12 threads concurrently. It was released in Q1/2023 and belongs to the 13 generation of the Intel Core i7 series. To use the Intel Core i7-1355U, you'll need a motherboard with a BGA 1744 socket.
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Intel Core i7 |
Family |
Intel Core i7 |
Mobile |
Segment |
Mobile |
12 |
Generation |
13 |
Intel Core i7-1255U |
Name |
Intel Core i7-1355U |
Intel Core i 1200P/1200U |
Group |
Intel Core i 1300P/1300U |
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CPU Cores and Base Frequency |
The Intel Core i7-1255U has 10 CPU cores and can calculate 12 threads in parallel. The clock frequency of the A-Core is 1.7 GHz. The number of CPU cores greatly affects the speed of the processor and is an important performance indicator. Processors with hybrid (big.LITTLE) architecture strike a balance between performance and power efficiency, making them ideal for mobile devices. The Intel Core i7-1355U has 10 CPU cores and can calculate 12 threads in parallel.
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1.7 GHz |
A-Core Frequency |
1.7 GHz |
3.5 GHz |
B-Core Frequency Turbo |
3.7 GHz |
12 |
Threads |
12 |
10 |
CPU Cores |
10 |
hybrid (big.LITTLE) |
Core architecture |
hybrid (big.LITTLE) |
1.2 GHz |
B-Core Frequency |
1.2 GHz |
Yes |
Hyperthreading |
Yes |
4.7 GHz |
A-Core Frequency Turbo |
5.0 GHz |
No |
Overclocking |
No |
8x Gracemont |
Cores B |
8x Gracemont |
2x Golden Cove |
Cores A |
2x Raptor Cove |
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Internal Graphics |
The Intel Core i7-1255U has integrated graphics, called iGPU for short. Specifically, the Intel Core i7-1255U uses the Intel Iris Xe Graphics 96 (Alder Lake), which has 768 texture shaders and 96 execution units. The iGPU uses the system's main memory as graphics memory and sits on the processor's die. The Intel Core i7-1355U has integrated graphics, called iGPU for short. Specifically, the Intel Core i7-1355U uses the Intel Iris Xe Graphics 96 (Alder Lake), which has 768 texture shaders
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96 |
Execution units |
96 |
13 |
Generation |
13 |
12.1 |
Direct X |
12.1 |
768 |
Shaders |
768 |
32.0 GB |
Max. GPU Memory |
32.0 GB |
0.35 GHz |
GPU frequency |
0.35 GHz |
10 nm |
Technology |
10 nm |
Q1/2022 |
Release date |
Q1/2022 |
-- |
Max. displays |
-- |
1.25 GHz |
GPU (Turbo) |
1.3 GHz |
Intel Iris Xe Graphics 96 (Alder Lake) |
GPU name |
Intel Iris Xe Graphics 96 (Alder Lake) |
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Artificial Intelligence and Machine Learning |
-- |
AI specifications |
-- |
-- |
AI hardware |
-- |
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Hardware codec support |
A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.
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Decode / Encode |
AVC |
Decode / Encode |
Decode |
VP8 |
Decode |
Decode / Encode |
h265 / HEVC (10 bit) |
Decode / Encode |
Decode / Encode |
h264 |
Decode / Encode |
Decode / Encode |
h265 / HEVC (8 bit) |
Decode / Encode |
Decode / Encode |
VP9 |
Decode / Encode |
Decode / Encode |
JPEG |
Decode / Encode |
Decode |
VC-1 |
Decode |
Decode |
AV1 |
Decode |
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Memory & PCIe |
The processor supports a maximum memory capacity of 64.0 GB distributed across 2 memory channels. It offers a peak memory bandwidth of 76.8 GB/s. Both the type and quantity of memory can have a substantial impact on the overall system performance. The processor supports a maximum memory capacity of 64.0 GB distributed across 2 memory channels. It offers a peak memory bandwidth of 89.6 GB/s. Both the type and quantity of memory can have a substantial impact on the overall system performance.
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64.0 GB |
Max. Memory |
64.0 GB |
No |
ECC |
No |
Yes |
AES-NI |
Yes |
2 |
Memory channels |
2 |
pci |
PCIe |
pci |
76.8 GB/s |
Bandwidth |
89.6 GB/s |
DDR4-3200, LPDDR4X-4266, DDR5-4800, LPDDR5-5200 |
Memory type |
DDR4-3200, LPDDR4X-4266, LPDDR5-6400, DDR5-5200 |
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Thermal Management |
The processor has a thermal design power (TDP) of 15 W watts. TDP indicates the cooling solution needed to effectively manage the processor's heat. It generally provides an approximate indication of the actual power consumption of the CPU itself.
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100 °C |
Tjunction max |
100 °C |
15 W |
TDP (PL1 / PBP) |
15 W |
55 W |
TDP (PL2) |
55 W |
None |
TDP down |
12 W |
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Technical details |
The Intel Core i7-1255U is manufactured using a 10 nm process. A smaller manufacturing process indicates a more contemporary and energy-efficient CPU. In total, this processor boasts a generous 12.0 MB cache. A substantial cache can significantly enhance the processor's performance, particularly in scenarios like gaming. The Intel Core i7-1355U is manufactured using a 10 nm process.
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12.0 MB |
L3-Cache |
12.0 MB |
Windows 10, Linux, Windows 11 |
Operating systems |
Windows 10, Linux, Windows 11 |
SSE4.1, SSE4.2, AVX2 |
ISA extensions |
SSE4.1, SSE4.2, AVX2 |
x86-64 (64 bit) |
Instruction set (ISA) |
x86-64 (64 bit) |
-- |
Release price |
-- |
Technical data sheet |
Documents |
Technical data sheet |
Q1/2022 |
Release date |
Q1/2023 |
6.5 MB |
L2-Cache |
0 bytes |
VT-x, VT-x EPT, VT-d |
Virtualization |
VT-x, VT-x EPT, VT-d |
-- |
Part Number |
-- |
Alder Lake U |
Architecture |
Raptor Lake U |
10 nm |
Technology |
10 nm |
BGA 1744 |
Socket |
BGA 1744 |
Monolithic |
Chip design |
Monolithic |
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