Intel Core i7 6800K vs Intel Core i7 7740X

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We compared two desktop CPUs: Intel Core i7 6800K with 6 cores 3.4GHz 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 i7 6800K 's Advantages

Larger memory bandwidth (76.8GB/s vs 42.7GB/s)

Larger L3 cache size (15MB vs 8MB)

Intel Core i7 7740X 's Advantages

Released 1 years late

Higher specification of memory (DDR4-2666 vs DDR4-2133)

Higher base frequency (4.3GHz vs 3.4GHz)

Lower TDP (112W vs 140W)

Score

Benchmark

Geekbench 6 Single Core

Intel Core i7 6800K

1363

Intel Core i7 7740X +13%

1553

Geekbench 6 Multi Core

Intel Core i7 6800K +17%

6495

Intel Core i7 7740X

5516

Geekbench 5 Single Core

Intel Core i7 6800K

922

Intel Core i7 7740X +40%

1291

Geekbench 5 Multi Core

Intel Core i7 6800K +10%

5537

Intel Core i7 7740X

5001

Passmark CPU Single Core

Intel Core i7 6800K

2269

Intel Core i7 7740X +21%

2759

Passmark CPU Multi Core

Intel Core i7 6800K +9%

10740

Intel Core i7 7740X

9824

Intel Core i7 6800K

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Intel Core i7 7740X

General Parameters

May 2016

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Broadwell E

Core Architecture

Kaby Lake

i7-6800K

Processor Number

i7-7740X

LGA-2011-3

Socket

LGA-2066

N/A

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-2011-3

Socket

LGA-2066

140 W

Power Consumption

112 W

-

Peak Operating Temperature

100 °C

CPU Performance

6

Performance Cores

4

12

Performance Core Threads

8

3.4 GHz

Performance Core Base Frequency

4.3 GHz

3.6 GHz

Performance Core Turbo Frequency

4.5 GHz

6

Total Core Count

4

12

Total Thread Count

8

100 MHz

Bus Frequency

-

34x

Multiplier

43x

32 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

256 K per core

15 MB shared

L3 Cache

8 MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2133

Memory Types

DDR4-2666

128 GB

Max Memory Size

64 GB

4

Max Memory Channels

2

76.8 GB/s

Max Memory Bandwidth

42.7 GB/s

No

ECC Memory Support

No

Miscellaneous

Intel Core i7 6800K

Official Website

Intel Core i7 7740X

3.0

PCIe Version

3.0

28

PCIe Lanes

16

-

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2

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