Intel Core i7 7800X vs Intel Core i5 7640X

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We compared two desktop CPUs: Intel Core i7 7800X with 6 cores 3.5GHz 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 7800X 's Advantages

Larger memory bandwidth (79.47GB/s vs 42.7GB/s)

Larger L3 cache size (8MB vs 6MB)

Intel Core i5 7640X 's Advantages

Higher specification of memory (DDR4-2666 vs DDR4-2400)

Higher base frequency (4.0GHz vs 3.5GHz)

Lower TDP (112W vs 140W)

Score

Benchmark

Geekbench 6 Single Core

Intel Core i7 7800X

1362

Intel Core i5 7640X +4%

1419

Geekbench 6 Multi Core

Intel Core i7 7800X +63%

6082

Intel Core i5 7640X

3726

Geekbench 5 Single Core

Intel Core i7 7800X

1069

Intel Core i5 7640X +15%

1237

Geekbench 5 Multi Core

Intel Core i7 7800X +55%

6578

Intel Core i5 7640X

4230

Passmark CPU Single Core

Intel Core i7 7800X

2409

Intel Core i5 7640X +3%

2505

Passmark CPU Multi Core

Intel Core i7 7800X +91%

12894

Intel Core i5 7640X

6735

Intel Core i7 7800X

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Intel Core i5 7640X

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

i7-7800X

Processor Number

i5-7640X

LGA-2066

Socket

LGA-2066

N/A

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-2066

Socket

LGA-2066

140 W

Power Consumption

112 W

100 °C

Peak Operating Temperature

100 °C

CPU Performance

6

Performance Cores

4

12

Performance Core Threads

4

3.5 GHz

Performance Core Base Frequency

4.0 GHz

4 GHz

Performance Core Turbo Frequency

4.2 GHz

6

Total Core Count

4

12

Total Thread Count

4

100 MHz

Bus Frequency

-

35x

Multiplier

39x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

256 K per core

8 MB shared

L3 Cache

6 MB shared

Yes

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2400

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

Intel Core i7 7800X

Official Website

Intel Core i5 7640X

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

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