Русский 
Deutsch 
Português 
Italiano 
Français 
日本語 
Español 
Polski 
简体中文 
한국어 
Differences
Top features of Intel Core i9-7900X
-
Higher clock speed3.30 GHz
2.90 GHz
Around -14% better clock speed -
More number of cores10
6
2 times more threads
-
Higher turbo clock speed4.30 GHz
4.10 GHz
Around 5% better overclocked clock speed
Top features of Intel Core i5-9400
-
Performance per watt65 W
140 W
About 0.46 times less performance per watt
Specifications
Complete list of technical specificationsCPU generation and family
Let's find out which one of Intel Core i9-7900X and Intel Core i5-9400 is of a more recent generation, and what segment it belongs to.
| Specification | Value |
|---|---|
| Name |
Intel Core i9-7900X
Intel Core i5-9400
|
| Segment |
Desktop / Server
Desktop / Server
|
| Family |
Intel Core i9
Intel Core i5
|
| Generation |
7
9
|
| CPU group |
Intel Core i 7000X
Intel Core i 9000
|
| Predecessor |
--
Intel Core i5-8400
|
| Successor |
--
Intel Core i5-10400
|
CPU Cores and Base Frequency
In this block we are going to compare Intel Core i9-7900X vs Intel Core i5-9400 by main technical specifications: number of cores and threads, base and maximum frequencies, process technology and cache size. The higher these specifications are, the more powerful your CPU will be.
| Specification | Value |
|---|---|
| Frequency |
3.30 GHz
2.90 GHz
|
| CPU Cores |
10
6
|
| Turbo (1 Core) |
4.30 GHz
4.10 GHz
|
| CPU Threads |
20
6
|
| Hyperthreading |
Yes
No
|
| Overclocking |
Yes
No
|
| Core architecture |
normal
normal
|
Internal Graphics
Common specifications for integrated graphics cards in Intel Core i9-7900X and Intel Core i5-9400 along with supported interfaces and connection options. This block has no effect on the final efficiency of the CPU.
| Specification | Value |
|---|---|
| GPU name |
no iGPU
Intel UHD Graphics 630
|
| GPU frequency |
0.35 GHz
|
| GPU (Turbo) |
No turbo
1.05 GHz
|
| Execution units |
24
|
| Shader |
192
|
| Max. GPU Memory |
--
64 GB
|
| Max. displays |
3
|
| Generation |
9.5
|
| DirectX Version |
12
|
| Technology |
14 nm
|
| Release date |
Q4/2017
|
Hardware codec support
Let's compare the support of video codecs between Intel Core i9-7900X and Intel Core i5-9400. Hardware support of video decoding by embedded graphics cards directly affects the speed and quality of rendering videos.
| Specification | Value |
|---|---|
| h265 / HEVC (8 bit) |
No
Decode / Encode
|
| h265 / HEVC (10 bit) |
No
Decode / Encode
|
| h264 |
No
Decode / Encode
|
| VP9 |
No
Decode / Encode
|
| VP8 |
No
Decode / Encode
|
| AV1 |
No
No
|
| AVC |
No
Decode / Encode
|
| VC-1 |
No
Decode
|
| JPEG |
No
Decode / Encode
|
Memory & PCIe
To choose the best model between Intel Core i9-7900X and Intel Core i5-9400 you need to pay special attention to memory type, clock frequency, multi-channel features, and PCIe version. The higher these numbers are, the better your CPU will be. Keep in mind that the maximum memory and frequency may also depend on the model of the motherboard.
| Specification | Value |
|---|---|
| Memory type |
DDR4-2666
DDR4-2666
|
| Max. Memory |
128 GB
|
| ECC |
No
No
|
| Memory channels |
4
2
|
| PCIe version |
3.0
3.0
|
| PCIe lanes |
44
16
|
Encryption
AES-NI encryption support for CPUs Intel Core i9-7900X and Intel Core i5-9400.
| Specification | Value |
|---|---|
| AES-NI |
Yes
Yes
|
Thermal Management
Let's find out what TDP value would be better for Intel Core i9-7900X or Intel Core i5-9400? The Thermal Design Power (TDP) indicates the maximum amount of heat that should be dissipated by the chip cooling system. However, the value of TDP gives only a rough indication of the real power consumption of the CPU.
| Specification | Value |
|---|---|
| TDP (PL1) |
140 W
65 W
|
| Tjunction max. |
--
100 °C
|
Technical details
Here you can find a comparison of 2nd and 3rd level cache sizes for Intel Core i9-7900X and Intel Core i5-9400 CPUs along with a list of ISA extensions.
| Specification | Value |
|---|---|
| Instruction set (ISA) |
x86-64 (64 bit)
x86-64 (64 bit)
|
| Virtualization |
VT-x, VT-x EPT, VT-d
VT-x, VT-x EPT, VT-d
|
| ISA extensions |
SSE4.1, SSE4.2, AVX2, AVX-512
SSE4.1, SSE4.2, AVX2
|
| L3-Cache |
14.00 MB
9.00 MB
|
| Architecture |
Skylake X
Coffee Lake S Refresh
|
| Technology |
14 nm
14 nm
|
| Socket |
LGA 2066
LGA 1151-2
|
| Release date |
Q2/2017
Q2/2019
|
Devices using this processor
List of devices based on Intel Core i9-7900X and Intel Core i5-9400.
| Specification | Value |
|---|---|
| Used in |
Unknown
HP Slim S01-pF0013ngAnkermann AC Agentur1 PC PC Intel Core i5-9400Kiebel Aufrüst Gamer PC (v9) Intel Core i5 9400MEDION ERAZER P66065 Gaming Desktop mit Intel Core i5-9400
|
