Intel Core i9-7900X vs Intel Core i7-7700K

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CPU comparison with benchmarks


Intel Core i9-7900X CPU1 vs CPU2 Intel Core i7-7700K
Intel Core i9-7900X Intel Core i7-7700K

CPU comparison

Intel Core i9-7900X or Intel Core i7-7700K - 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 i9-7900X has 10 cores with 20 threads and clocks with a maximum frequency of 4.30 GHz. Up to 128 GB of memory is supported in 4 memory channels. The Intel Core i9-7900X was released in Q2/2017.

The Intel Core i7-7700K 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 i7-7700K was released in Q1/2017.
Intel Core i9 (78) Family Intel Core i7 (298)
Intel Core i 7000X (9) CPU group Intel Core i 7000 (17)
7 Generation 7
Skylake X Architecture Kaby Lake S
Desktop / Server Segment Desktop / Server
-- Predecessor Intel Core i7-6700K
Intel Core i9-9900X Successor Intel Core i7-8700K

CPU Cores and Base Frequency

The Intel Core i9-7900X is a 10 core processor with a clock frequency of 3.30 GHz (4.30 GHz). The Intel Core i7-7700K has 4 CPU cores with a clock frequency of 4.20 GHz (4.50 GHz).

Intel Core i9-7900X Characteristic Intel Core i7-7700K
10 Cores 4
20 Threads 8
normal Core architecture normal
Yes Hyperthreading Yes
Yes Overclocking ? Yes
3.30 GHz Frequency 4.20 GHz
4.30 GHz Turbo Frequency (1 Core) 4.50 GHz
4.00 GHz Turbo Frequency (All Cores) 4.40 GHz

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 i9-7900X Characteristic Intel Core i7-7700K
-- 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.

no iGPU GPU Intel HD Graphics 630
GPU frequency 0.35 GHz
-- GPU (Turbo) 1.15 GHz
-- GPU Generation 9.5
Technology 14 nm
Max. displays 3
-- Compute units 24
-- Shader 192
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory 64 GB
-- DirectX Version 12

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.

no iGPU GPU Intel HD Graphics 630
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode / Encode
No Codec h264 Decode / Encode
No Codec VP9 Decode / Encode
No Codec VP8 Decode / Encode
No Codec AV1 No
No Codec AVC Decode / Encode
No Codec VC-1 Decode
No Codec JPEG Decode / Encode

Memory & PCIe

The Intel Core i9-7900X supports a maximum of 128 GB of memory in 4 memory channels. The Intel Core i7-7700K can connect up to 64 GB of memory in 2 memory channels.

Intel Core i9-7900X Characteristic Intel Core i7-7700K
DDR4-2666 Memory DDR4-2400, DDR3-1600
128 GB Max. Memory 64 GB
4 (Quad Channel) Memory channels 2 (Dual Channel)
85.4 GB/s Max. Bandwidth 38.4 GB/s
No ECC No
-- L2 Cache --
14.00 MB L3 Cache 8.00 MB
3.0 PCIe version 3.0
44 PCIe lanes 16
43.3 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 i9-7900X has a TDP of 140 W, that of the Intel Core i7-7700K is 91 W.

Intel Core i9-7900X Characteristic Intel Core i7-7700K
140 W TDP (PL1 / PBP) 91 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i9-7900X has a 14.00 MB cache, while the Intel Core i7-7700K cache has a total of 8.00 MB.

Intel Core i9-7900X Characteristic Intel Core i7-7700K
14 nm Technology 14 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2, AVX-512 ISA extensions SSE4.1, SSE4.2, AVX2
LGA 2066 Socket LGA 1151
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q2/2017 Release date Q1/2017
989 $ Release price 350 $
show more data show more data


Rate these processors

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Here you can rate the Intel Core i7-7700K to help other visitors make their purchasing decisions. The average rating is 3.3 stars (25 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 5 CPU benchmarks
Intel Core i9-7900X (96%)
Intel Core i7-7700K (100%)
⌀ Multi core performance in 8 CPU benchmarks
Intel Core i9-7900X (93%)
Intel Core i7-7700K (53%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.30 GHz
1222 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.50 GHz
1216 (100%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
14998 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
6055 (40%)

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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.30 GHz
1133 (92%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.50 GHz
1229 (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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
10199 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
4719 (46%)

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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.30 GHz
1410 (96%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.50 GHz
1463 (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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
9120 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
5149 (56%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.30 GHz
461 (99%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.50 GHz
466 (100%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
5286 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
2257 (43%)

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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
21190 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
9666 (46%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
Intel Core i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
137.7 (41%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
335.8 (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 i9-7900X Intel Core i9-7900X
10C 20T @ 3.30 GHz
5530 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.20 GHz
2523 (46%)

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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.30 GHz
188 (94%)
Intel Core i7-7700K Intel Core i7-7700K
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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
2194 (100%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
995 (45%)

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 i9-7900X Intel Core i9-7900X
@ 0.00 GHz
0 (0%)
Intel Core i7-7700K Intel Core i7-7700K
Intel HD Graphics 630 @ 1.15 GHz
442 (100%)

Blender 3.1 Benchmark

In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
Intel Core i9-7900X Intel Core i9-7900X
10C 20T @ 4.00 GHz
0 (0%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.40 GHz
97 (100%)

CPU-Z Benchmark 17 (Single-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 i9-7900X Intel Core i9-7900X
10C 20T @ 4.30 GHz
0 (0%)
Intel Core i7-7700K Intel Core i7-7700K
4C 8T @ 4.50 GHz
500 (100%)

Devices using this processor

Intel Core i9-7900X Intel Core i7-7700K
Unknown Unknown

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