Intel Core i7-1255UL vs Intel Core i7-7740X

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CPU comparison with benchmarks


Intel Core i7-1255UL CPU1 vs CPU2 Intel Core i7-7740X
Intel Core i7-1255UL Intel Core i7-7740X

CPU comparison

Intel Core i7-1255UL or Intel Core i7-7740X - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The Intel Core i7-1255UL has 10 cores with 12 threads and clocks with a maximum frequency of 4.70 GHz. Up to 64 GB of memory is supported in 2 memory channels. The Intel Core i7-1255UL was released in Q3/2022.

The Intel Core i7-7740X has 4 cores with 8 threads and clocks with a maximum frequency of 4.50 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The Intel Core i7-7740X was released in Q2/2017.
Intel Core i7 (298) Family Intel Core i7 (298)
Intel Core i 1200P/1200U (21) CPU group Intel Core i 7000X (9)
12 Generation 7
Alder Lake U Architecture Skylake X
Mobile Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i7-1255UL is a 10 core processor with a clock frequency of 2.60 GHz (4.70 GHz). The Intel Core i7-7740X has 4 CPU cores with a clock frequency of 4.30 GHz (4.50 GHz).
Intel Core i7-1255UL Characteristic Intel Core i7-7740X
10 Cores 4
12 Threads 8
hybrid (big.LITTLE) Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? Yes
2.60 GHz (4.70 GHz)
2x Golden Cove		 A-Core 4.30 GHz (4.50 GHz)
1.20 GHz (3.50 GHz)
8x Gracemont		 B-Core --

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Intel Core i7-1255UL Characteristic Intel Core i7-7740X
-- AI hardware --
-- AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.
Intel Iris Xe Graphics 96 (Alder Lake) GPU no iGPU
0.35 GHz GPU frequency --
1.25 GHz GPU (Turbo) --
13 GPU Generation --
10 nm Technology
4 Max. displays
96 Compute units --
768 Shader --
No Hardware Raytracing No
No Frame Generation No
32 GB Max. GPU Memory --
12.1 DirectX Version --

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.
Intel Iris Xe Graphics 96 (Alder Lake) GPU no iGPU
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 No
Decode / Encode Codec VP9 No
Decode Codec VP8 No
Decode Codec AV1 No
Decode / Encode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

The Intel Core i7-1255UL supports a maximum of 64 GB of memory in 2 memory channels. The Intel Core i7-7740X can connect up to 64 GB of memory in 2 memory channels.
Intel Core i7-1255UL Characteristic Intel Core i7-7740X
DDR5-4800, DDR4-3200 Memory DDR4-2666
64 GB Max. Memory 64 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
76.8 GB/s Max. Bandwidth 42.7 GB/s
No ECC No
6.50 MB L2 Cache --
12.00 MB L3 Cache 8.00 MB
4.0 PCIe version 3.0
28 PCIe lanes 16
55.1 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i7-1255UL has a TDP of 15 W, that of the Intel Core i7-7740X is 112 W.
Intel Core i7-1255UL Characteristic Intel Core i7-7740X
15 W TDP (PL1 / PBP) 112 W
55 W TDP (PL2) --
28 W TDP up --
12 W TDP down --
100 °C Tjunction max. --

Technical details

The Intel Core i7-1255UL has a 18.50 MB cache, while the Intel Core i7-7740X cache has a total of 8.00 MB.
Intel Core i7-1255UL Characteristic Intel Core i7-7740X
10 nm Technology 14 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions SSE4.1, SSE4.2, AVX2, AVX-512
BGA 1744 Socket LGA 2066
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 10, Linux
Q3/2022 Release date Q2/2017
-- Release price 375 $
show more data show more data


Rate these processors

Here you can rate the Intel Core i7-1255UL to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:
Here you can rate the Intel Core i7-7740X to help other visitors make their purchasing decisions. The average rating is 5.0 stars (1 ratings). Rate now:


Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 4.70 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.50 GHz
1277 (100%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 3.30 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.30 GHz
4834 (100%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 4.70 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.50 GHz
1497 (100%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 3.30 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.30 GHz
5220 (100%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core i7-1255UL Intel Core i7-1255UL
Intel Iris Xe Graphics 96 (Alder Lake) @ 1.25 GHz
1916 (100%)
Intel Core i7-7740X Intel Core i7-7740X
@ 0.00 GHz
0 (0%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 3.30 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.30 GHz
9846 (100%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 2.60 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.30 GHz
2540 (100%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 4.70 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.50 GHz
200 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i7-1255UL Intel Core i7-1255UL
10C 12T @ 3.30 GHz
0 (0%)
Intel Core i7-7740X Intel Core i7-7740X
4C 8T @ 4.30 GHz
976 (100%)

Devices using this processor
Intel Core i7-1255UL Intel Core i7-7740X
Unknown Unknown

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