Intel
Intel Core i5-9600K
Unlocked six-core, six-thread Coffee Lake Refresh built for high-refresh 1080p gaming, with near-flagship per-core speed once overclocked. The absence of hyperthreading is what dates it — six threads is where this chip runs out of room in modern engines.
Pros
- Unlocked multiplier plus a soldered IHS; 4.9-5.0 GHz all-core is a common overclock on a decent air cooler
- 4.6 GHz stock single-core turbo, within striking distance of the i9-9900K in lightly threaded work
- UHD 630 iGPU on board for display-out and Quick Sync when no GPU is installed
- 9 MB L3 and full 300-series board compatibility, including cheap used Z370 boards
- Sits on the same socket as the i7-9700K and i9-9900K, so a later CPU swap is a drop-in
Cons
- Six cores with no SMT: stutters in CPU-heavy games and streaming setups where the 8700K does not
- No bundled cooler, and it needs a good one to hold turbo, let alone overclock
- 95 W base power understates real all-core draw, especially overclocked
- PCIe 3.0, 16 CPU lanes, official DDR4-2666 — dated I/O for a 2026 build
Below average
Computed from specs & benchmarks via our public methodology.
Full specifications
Everything we track for the Intel Core i5-9600K
General
- Announced
- 2018
- Socket
- LGA1151-v2
- Process
- 14 nm
- Base TDP
- 95 W
- Max turbo power
- 119 W
- Unlocked multiplier
- Yes
- Cooler included
- No
Cores & Clocks
- Cores
- 6
- Performance cores
- 6
- Efficiency cores
- 0
- Threads
- 6
- Base clock
- 3.7 GHz
- Boost clock
- 4.6 GHz
- L2 cache
- 2 MB
- L3 cache
- 9 MB
Integrated GPU
- iGPU
- Intel UHD Graphics 630
- iGPU clock
- 1,150 MHz
Memory
- Memory support
- DDR4-2666
- Max memory
- 128 GB
- Memory channels
- 2
Platform
- PCIe version
- 3
- CPU PCIe lanes
- 16
Benchmarks
- Geekbench 6 (single)
- 1,580
- Geekbench 6 (multi)
- 5,000
- Cinebench R23 (single)
- 1,200
- Cinebench R23 (multi)
- 6,700
- PassMark
- 11,200
Quick answers
Is the Intel Core i5-9600K good in 2026?
The Intel Core i5-9600K earns an Inno Score of 32/100 (“Below average”) based on its specs and benchmark results. Unlocked six-core, six-thread Coffee Lake Refresh built for high-refresh 1080p gaming, with near-flagship per-core speed once overclocked. The absence of hyperthreading is what dates it — six threads is where this chip runs out of room in modern engines.
What are the key specs of the Intel Core i5-9600K?
Cores: 6 · Threads: 6 · Boost clock: 4.6 GHz · Socket: LGA1151-v2
What are the closest alternatives to the Intel Core i5-9600K?
Its closest rivals on InnoReviews are AMD Ryzen 3 3100, Intel Core i7-5960X, Intel Core i5-10400 — open the comparison pages for a spec-by-spec breakdown.