Intel Core i9 7900X vs Intel Core i7 7740X

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We compared two desktop CPUs: Intel Core i9 7900X with 10 cores 3.3GHz and Intel Core i7 7740X with 4 cores 4.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i9 7900X 's Advantages

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

Larger L3 cache size (14MB vs 8MB)

Intel Core i7 7740X 's Advantages

Higher base frequency (4.3GHz vs 3.3GHz)

Lower TDP (112W vs 140W)

Score

Benchmark

Geekbench 6 Single Core

Intel Core i9 7900X

1323

Intel Core i7 7740X +17%

1553

Geekbench 6 Multi Core

Intel Core i9 7900X +54%

8536

Intel Core i7 7740X

5516

Geekbench 5 Single Core

Intel Core i9 7900X

1127

Intel Core i7 7740X +14%

1291

Geekbench 5 Multi Core

Intel Core i9 7900X +103%

10189

Intel Core i7 7740X

5001

Passmark CPU Single Core

Intel Core i9 7900X

2556

Intel Core i7 7740X +7%

2759

Passmark CPU Multi Core

Intel Core i9 7900X +113%

20991

Intel Core i7 7740X

9824

Intel Core i9 7900X

VS

Intel Core i7 7740X

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

i9-7900X

Processor Number

i7-7740X

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

95 °C

Peak Operating Temperature

100 °C

CPU Performance

10

Performance Cores

4

20

Performance Core Threads

8

3.3 GHz

Performance Core Base Frequency

4.3 GHz

Performance Core Turbo Frequency

4.5 GHz

10

Total Core Count

4

20

Total Thread Count

8

100 MHz

Bus Frequency

-

33x

Multiplier

43x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

256 K per core

14 MB shared

L3 Cache

8 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

Intel Core i9 7900X

Official Website

Intel Core i7 7740X

3.0

PCIe Version

3.0

44

PCIe Lanes

16

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

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2

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