Intel Core i5-11400 vs Intel Core i9-9900K

Compare Intel 11th Generation Core i5 6 core CPU vs Intel 9th Generation Core i9 8 core processor, specs and benchmark score. Which is the better CPU for gaming?

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The cheapest price from our partner retailers

$ 164.99
$ 422.01 significantly less expensive
$ 587.00

Benchmark Score

Overall Score

A combined score of all workloads

58 %
70 %
20% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

84 %
86 %
2% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

49 %
65 %
32% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

47 %
64 %
36% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Core i5-11400 and the Core i9-9900K? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Geekbench (multi) score

Multi threaded benchmark

25% slightly higher Geekbench (multi) score
Geekbench (single) score

Geekbench (single) score

Single threaded benchmark

12% slightly higher Geekbench (single) score
3DMark Physics score

3DMark Physics score

Physics simulation benchmark

30% slightly higher 3DMark Physics score



Number of physical processing units

33% slightly more cores


Number of logical processing units

33% slightly more threads

Clock Speed

Base frequency at which the chip operates

3.6 GHz
3.6 GHz

Turbo Speed

Higher frequency used for heavy workloads

4.4 GHz
5 GHz
13% slightly higher turbo speed


Thermal Design Power: Measure of heat generated by the CPU

65 W
46% significantly lower TDP
95 W

PCIe Lanes

Number of physical connections between the CPU and expansion slots

25% slightly more pcie lanes

Memory Channels

Lanes for simultaneous memory access


Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB
128 GiB

L1 Cache

Smallest embedded memory, but the fastest

480 KiB
512 KiB
6% slightly more L1 cache

L2 Cache

Secondary embedded memory, slower than L1 cache

3 MiB
49% significantly more L2 cache
2 MiB

L3 Cache

General memory pool for all cores

12 MiB
16 MiB
33% slightly more L3 cache

Other details


Ranking in the hardwareDB database

130th of 1,219
75th of 1,219


The product line

11th Generation Core i5
9th Generation Core i9

Release date

The official date of release of this chip

February 2021
November 2018

Memory Type

The type of memory used by this chip


Is Unlocked

Can this CPU can be overclocked


Supports ECC memory

Does this CPU support error correcting memory


Core i5-11400 vs Core i9-9900K benchmarks

In our benchmarks, the Core i9-9900K beats the Core i5-11400 in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i5-11400 in all gaming tests too.

When comparing core counts for these CPUs, we notice that the Core i9-9900K has slightly more cores with 8 cores compared to the Core i5-11400 that has 6 cores. It also has more threads than the Core i5-11400. In terms of clock speed, the Core i5-11400 and Core i9-9900K are identical in this regard. Despite this, the Core i9-9900K has a slightly higher turbo speed. A Core i5-11400 CPU outputs less heat than a Core i9-9900K CPU because of its significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. The info from our database shows that the Core i5-11400 has more L2 cache than the Core i9-9900K. Despite this, the Core i9-9900K has slightly more L3 cache compared to the Core i5-11400.

Modern CPUs generally have more logical cores than physical cores, this means that each core is split into multiple virtual cores, improving efficiency for parallel workloads. Indeed, the Core i5-11400 has more threads than cores. Each physical core is split into multiple threads.


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