Intel Core i5-8279U vs Intel Core i7-5820K

Compare Intel 8th Generation Core i5 4 core CPU vs Intel Core X-series 6 core processor, specs and benchmark score. Which is the better CPU for gaming?

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Benchmark Score

Overall Score

A combined score of all workloads

47 %
11% slightly better overall score
42 %

Gaming Score

The raw gaming performance with a fast GPU

58 %
9% slightly better gaming score
53 %

Multitasking Score

Performance in workloads using up to 8 cores

43 %
10% slightly better multitasking score
39 %

Heavy Workload Score

Performance in workloads using up to 16 cores

42 %
10% slightly better heavy workload score
38 %

Free CPU Benchmark

Want to compare your processor against the Core i5-8279U and the Core i7-5820K? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Multi threaded benchmark

50% significantly higher Geekbench (multi) score

Geekbench (single) score

Single threaded benchmark

9% slightly higher Geekbench (single) score



Number of physical processing units

49% significantly more cores


Number of logical processing units

49% significantly more threads

Clock Speed

Base frequency at which the chip operates

2 GHz
3 GHz
37% slightly higher clock speed

Turbo Speed

Higher frequency used for heavy workloads

4 GHz
13% slightly higher turbo speed
4 GHz


Thermal Design Power: Measure of heat generated by the CPU

28 W
400% significantly lower TDP
140 W

PCIe Lanes

Number of physical connections between the CPU and expansion slots

75% significantly more pcie lanes

Memory Channels

Lanes for simultaneous memory access

100% significantly more memory channels

Supported Memory

Maximum amount of RAM supported by this CPU

32 GiB
64 GiB
100% significantly more supported memory

Other details


Ranking in the hardwareDB database

361st of 1,327
419th of 1,327


The product line

8th Generation Core i5
Core X-series

Release date

The official date of release of this chip

May 2019
August 2014

Memory Type

The type of memory used by this chip


Supports ECC memory

Does this CPU support error correcting memory


Core i5-8279U vs Core i7-5820K comparison

In our benchmarks, the Core i5-8279U beats the Core i7-5820K in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i7-5820K in all gaming tests too.

When comparing core counts for these CPUs, we notice that the Core i7-5820K has significantly more cores with 6 cores compared to the Core i5-8279U that has 4 cores. It also has more threads than the Core i5-8279U. Our comparison shows that the Core i7-5820K has a slightly higher clock speed compared to the Core i5-8279U. Despite this, the Core i5-8279U has a slightly higher turbo speed. A Core i5-8279U CPU outputs less heat than a Core i7-5820K CPU because of its significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption.

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 i5-8279U has more threads than cores. Each physical core is split into multiple threads.


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