Intel Core i9 9900X vs Intel Core i5 6600K

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We compared two desktop CPUs: Intel Core i9 9900X with 10 cores 3.5GHz and Intel Core i5 6600K with 4 cores 3.5GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i9 9900X 's Advantages

Released 3 years and 2 months late

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

Larger memory bandwidth (85GB/s vs 34.1GB/s)

Larger L3 cache size (20MB vs 6MB)

Intel Core i5 6600K 's Advantages

Integrated graphics card

Lower TDP (91W vs 165W)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i9 9900X +12%

1178

Intel Core i5 6600K

1043

Cinebench R23 Multi Core

Intel Core i9 9900X +250%

13952

Intel Core i5 6600K

3982

Geekbench 6 Single Core

Intel Core i9 9900X +10%

1455

Intel Core i5 6600K

1314

Geekbench 6 Multi Core

Intel Core i9 9900X +171%

10273

Intel Core i5 6600K

3782

Geekbench 5 Single Core

Intel Core i9 9900X +3%

1165

Intel Core i5 6600K

1125

Geekbench 5 Multi Core

Intel Core i9 9900X +183%

10704

Intel Core i5 6600K

3775

Passmark CPU Single Core

Intel Core i9 9900X +10%

2565

Intel Core i5 6600K

2320

Passmark CPU Multi Core

Intel Core i9 9900X +247%

21833

Intel Core i5 6600K

6289

Intel Core i9 9900X

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Intel Core i5 6600K

General Parameters

Oct 2018

Release Date

Aug 2015

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Skylake

i9-9900X

Processor Number

i5-6600K

LGA-2066

Socket

LGA-1151

N/A

Integrated Graphics

HD Graphics 530

Package

14 nm

Manufacturing Process

14 nm

LGA-2066

Socket

LGA-1151

165 W

Power Consumption

91 W

92 °C

Peak Operating Temperature

-

CPU Performance

10

Performance Cores

4

20

Performance Core Threads

4

3.5 GHz

Performance Core Base Frequency

3.5 GHz

4.4 GHz

Performance Core Turbo Frequency

3.9 GHz

10

Total Core Count

4

20

Total Thread Count

4

100 MHz

Bus Frequency

100 MHz

35x

Multiplier

35x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

256 K per core

20 MB shared

L3 Cache

6 MB shared

Yes

Unlocked Multiplier

No

Memory Parameters

DDR4-2666

Memory Types

DDR4-2133, DDR3L-1600

128 GB

Max Memory Size

64 GB

4

Max Memory Channels

2

85 GB/s

Max Memory Bandwidth

34.1 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

-

Integrated Graphics

true

-

GPU Max Dynamic Frequency

1150 MHz

Miscellaneous

Intel Core i9 9900X

Official Website

Intel Core i5 6600K

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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