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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Price

The cheapest price from our partner retailers

$ 155
$ 235.65 significantly less expensive
$ 391

Benchmark Score

Overall Score

A combined score of all workloads

70 %
84 %
20% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

101 %
1% slightly better gaming score
100 %

Multitasking Score

Performance in workloads using up to 8 cores

60 %
79 %
31% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

58 %
77 %
32% 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

Multi threaded benchmark

6,781
8,488
25% slightly higher Geekbench (multi) score

Geekbench (single) score

Single threaded benchmark

1,475
13% slightly higher Geekbench (single) score
1,305

3DMark Physics score

Physics simulation benchmark

8,224
10,793
31% slightly higher 3DMark Physics score

Specifications

Cores

Number of physical processing units

6
8
33% slightly more cores

Threads

Number of logical processing units

12
16
33% slightly more threads

Clock Speed

Base frequency at which the chip operates

4 GHz
Identical
4 GHz

Turbo Speed

Higher frequency used for heavy workloads

4 GHz
5 GHz
13% slightly higher turbo speed

TDP

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

20
25% slightly more pcie lanes
16

Memory Channels

Lanes for simultaneous memory access

2
Identical
2

Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB
Identical
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

Rank

Ranking in the hardwareDB database

158th of 1,327
101st of 1,327

Family

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

DDR4-3200
DDR4-2666

Is Unlocked

Can this CPU can be overclocked

No
Yes

Supports ECC memory

Does this CPU support error correcting memory

No
No

Core i5-11400 vs Core i9-9900K benchmarks

In our benchmarks, the Core i9-9900K beats the Core i5-11400 in overall performance. Despite this, the Core i5-11400 has the advantage in our gaming benchmark.

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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