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