Intel Core i7 7820X vs Intel Core i5 7640X
We compared two desktop CPUs: Intel Core i7 7820X with 8 cores 3.6GHz and Intel Core i5 7640X with 4 cores 4.0GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
Intel Core i7 7820X 's Advantages
Larger memory bandwidth (79.47GB/s vs 42.7GB/s)
Larger L3 cache size (11MB vs 6MB)
Intel Core i5 7640X 's Advantages
Higher base frequency (4.0GHz vs 3.6GHz)
Lower TDP (112W vs 140W)
Score
Benchmark
Geekbench 6 Single Core
Intel Core i7 7820X
1252
Intel Core i5 7640X
+13%
1419
Geekbench 6 Multi Core
Intel Core i7 7820X
+101%
7510
Intel Core i5 7640X
3726
Geekbench 5 Single Core
Intel Core i7 7820X
1120
Intel Core i5 7640X
+10%
1237
Geekbench 5 Multi Core
Intel Core i7 7820X
+101%
8504
Intel Core i5 7640X
4230
Passmark CPU Single Core
Intel Core i7 7820X
+1%
2536
Intel Core i5 7640X
2505
Passmark CPU Multi Core
Intel Core i7 7820X
+155%
17189
Intel Core i5 7640X
6735
General Parameters
May 2017
Release Date
May 2017
Intel
Manufacturer
Intel
Desktop
Type
Desktop
x86-64
Instruction Set
x86-64
Skylake
Core Architecture
Kaby Lake
i7-7820X
Processor Number
i5-7640X
LGA-2066
Socket
LGA-2066
N/A
Integrated Graphics
N/A
Package
14 nm
Manufacturing Process
14 nm
140 W
Power Consumption
112 W
99 °C
Peak Operating Temperature
100 °C
CPU Performance
8
Performance Cores
4
16
Performance Core Threads
4
3.6 GHz
Performance Core Base Frequency
4.0 GHz
4.3 GHz
Performance Core Turbo Frequency
4.2 GHz
8
Total Core Count
4
16
Total Thread Count
4
100 MHz
Bus Frequency
-
36x
Multiplier
39x
64 K per core
L1 Cache
64 K per core
1 MB per core
L2 Cache
256 K per core
11 MB shared
L3 Cache
6 MB shared
Yes
Unlocked Multiplier
Yes
Memory Parameters
DDR4-2666
Memory Types
DDR4-2666
128 GB
Max Memory Size
64 GB
4
Max Memory Channels
2
79.47 GB/s
Max Memory Bandwidth
42.7 GB/s
No
ECC Memory Support
No
Miscellaneous
3.0
PCIe Version
3.0
28
PCIe Lanes
16
SSE4.1, SSE4.2, AVX-2, AVX-512
Extended Instruction Set
SSE4.1, SSE4.2, AVX-2
