Intel Core i7 7820X vs Intel Core i9 7900X

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We compared two desktop CPUs: Intel Core i7 7820X with 8 cores 3.6GHz and Intel Core i9 7900X with 10 cores 3.3GHz . 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

Higher base frequency (3.6GHz vs 3.3GHz)

Intel Core i9 7900X 's Advantages

Larger L3 cache size (14MB vs 11MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i7 7820X +11%

1338

Intel Core i9 7900X

1203

Cinebench R23 Multi Core

Intel Core i7 7820X +13%

13358

Intel Core i9 7900X

11804

Geekbench 6 Single Core

Intel Core i7 7820X

1252

Intel Core i9 7900X +5%

1323

Geekbench 6 Multi Core

Intel Core i7 7820X

7510

Intel Core i9 7900X +13%

8536

Geekbench 5 Single Core

Intel Core i7 7820X

1120

Intel Core i9 7900X

1127

Geekbench 5 Multi Core

Intel Core i7 7820X

8504

Intel Core i9 7900X +19%

10189

Passmark CPU Single Core

Intel Core i7 7820X

2536

Intel Core i9 7900X

2556

Passmark CPU Multi Core

Intel Core i7 7820X

17189

Intel Core i9 7900X +22%

20991

Intel Core i7 7820X

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Intel Core i9 7900X

General Parameters

May 2017

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Skylake

i7-7820X

Processor Number

i9-7900X

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

140 W

99 °C

Peak Operating Temperature

95 °C

CPU Performance

8

Performance Cores

10

16

Performance Core Threads

20

3.6 GHz

Performance Core Base Frequency

3.3 GHz

4.3 GHz

Performance Core Turbo Frequency

4.3 GHz

8

Total Core Count

10

16

Total Thread Count

20

100 MHz

Bus Frequency

100 MHz

36x

Multiplier

33x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

1 MB per core

11 MB shared

L3 Cache

14 MB shared

Yes

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2666

Memory Types

DDR4-2666

128 GB

Max Memory Size

128 GB

4

Max Memory Channels

4

79.47 GB/s

Max Memory Bandwidth

79.47 GB/s

No

ECC Memory Support

No

Miscellaneous

Intel Core i7 7820X

Official Website

Intel Core i9 7900X

3.0

PCIe Version

3.0

28

PCIe Lanes

44

SSE4.1, SSE4.2, AVX-2, AVX-512

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2, AVX-512

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