Intel Core i5-9600K
A 9th-gen Coffee Lake six-core on the LGA1151 platform, now a used-market-only chip for very budget builds or existing 300-series board upgrades.
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Why we rate it
- Six cores on a budget platform
- Overclockable with K suffix
- Cheap LGA1151 ecosystem
- No background thread competition
- No HyperThreading limits multitasking
- LGA1151 platform is ancient
Where the Intel Core i5-9600K wins and loses
Specifications
General info
Cores and threads
Clocks and cache
Watch it in action
Intel Core i5-9600K vs Intel Intel Core i7-8700K
| IntelIntel Core i5-9600KThis page | IntelIntel Core i7-8700K | |
|---|---|---|
| Overall score | 75 /100 | 75 /100 |
| Core count | 6 | — |
| Thread count | 6 | — |
| Base clock | 3.7 GHz | — |
| L3 cache | 9 MB | — |
Is the Intel Core i5-9600K right for you?
If you already own an LGA1151 board and want the cheapest CPU upgrade available, the 9600K at a very low used price gets the job done for light gaming and everyday use.
Don't build an LGA1151 system from scratch in 2026. Used AM4 chips on the same budget deliver better gaming, more cores, and at least the option of a future platform upgrade to AM5.
Before you buy
It handles light gaming acceptably, but Zen 3 chips like the Ryzen 5 5600X at similar used prices are noticeably faster with more threads. Only consider the 9600K if it's at a significant price discount.
Intel removed HyperThreading from some 9th gen chips after the i7-8700K's success with it. The 9600K has 6 physical cores and 6 threads only. The i7-9700 and i7-9700K from the same generation also lacked HyperThreading.
LGA1151 socket boards with 300-series chipsets. Z390 or Z370 are needed for overclocking. B360 and H370 boards lock the multiplier. A BIOS update may be needed on some older boards.
At similar used prices, a Ryzen 5 5600X on AM4 is a significantly better buy. Better gaming, more threads, and slightly more future-proofing on AM4 versus the completely dead LGA1151 platform.
Alternatives & similar cpus
