Intel Core i5 7640X vs Intel Core i5 8400
We compared two desktop CPUs: Intel Core i5 7640X with 4 cores 4.0GHz and Intel Core i5 8400 with 6 cores 2.8GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
Intel Core i5 7640X Advantages
Larger memory bandwidth (42.7GB/s vs 41.6GB/s)
Higher base frequency (4.0GHz vs 2.8GHz)
Intel Core i5 8400 Advantages
Integrated graphics card
Larger L3 cache size (9MB vs 6MB)
Lower TDP (65W vs 112W)
Score
Benchmark
Geekbench 6 Single Core
Intel Core i5 7640X
+9%
1419
Intel Core i5 8400
1298
Geekbench 6 Multi Core
Intel Core i5 7640X
3726
Intel Core i5 8400
+25%
4677
Geekbench 5 Single Core
Intel Core i5 7640X
+19%
1237
Intel Core i5 8400
1032
Geekbench 5 Multi Core
Intel Core i5 7640X
4230
Intel Core i5 8400
+9%
4611
Passmark CPU Single Core
Intel Core i5 7640X
+4%
2505
Intel Core i5 8400
2387
Passmark CPU Multi Core
Intel Core i5 7640X
6735
Intel Core i5 8400
+36%
9214
General Parameters
May 2017
Release Date
Oct 2017
Intel
Manufacturer
Intel
Desktop
Type
Desktop
x86-64
Instruction Set
x86-64
Kaby Lake
Core Architecture
Coffee Lake
i5-7640X
Processor Number
i5-8400
LGA-2066
Socket
LGA-1151
N/A
Integrated Graphics
UHD Graphics 630
Package
14 nm
Manufacturing Process
14 nm
112 W
Power Consumption
65 W
100 °C
Peak Operating Temperature
100 °C
CPU Performance
4
Performance Cores
6
4
Performance Core Threads
6
4.0 GHz
Performance Core Base Frequency
2.8 GHz
4.2 GHz
Performance Core Turbo Frequency
4 GHz
4
Total Core Count
6
4
Total Thread Count
6
-
Bus Frequency
100 MHz
39x
Multiplier
28x
64 K per core
L1 Cache
64 K per core
256 K per core
L2 Cache
256 K per core
6 MB shared
L3 Cache
9 MB shared
Yes
Unlocked Multiplier
No
Memory Parameters
DDR4-2666
Memory Types
DDR4-2666
64 GB
Max Memory Size
128 GB
2
Max Memory Channels
2
42.7 GB/s
Max Memory Bandwidth
41.6 GB/s
No
ECC Memory Support
No
Graphics Card Parameters
-
Integrated Graphics
true
-
GPU Base Frequency
350 MHz
-
GPU Max Dynamic Frequency
1050 MHz
-
Shader Units
192
-
Texture Units
24
-
Raster Operation Units
3
-
Execution Units
24
-
Power Consumption
15 W
-
Max Resolution
4096x2304 - 60 Hz
-
Graphics Performance
0.38 TFLOPS
Miscellaneous
3.0
PCIe Version
3.0
16
PCIe Lanes
16
SSE4.1, SSE4.2, AVX-2
Extended Instruction Set
SSE4.1, SSE4.2, AVX-2
