Intel Core i7-8700K, the unlocked 8th-gen Coffee Lake flagship from 2017. 6 cores, 12 threads, 3.7 GHz base with 4.7 GHz max boost, 12MB L3 cache. Was the de-facto enthusiast gaming CPU of 2017-2020 and still holds up for 1080p high-refresh gaming, content creation, and general productivity in 2026. Unlocked K multiplier means it overclocks if your motherboard and cooling support it. Pulled from a working desktop build.
| Manufacturer | Intel |
| Product Line | Core i7 (8th Gen) |
| Model | i7-8700K |
| Spec Code (sSpec) | SR3QR |
| Codename | Coffee Lake |
| Lithography | 14nm+ |
| Cores / Threads | 6 / 12 |
| Base Clock | 3.70 GHz |
| Max Turbo Clock | 4.70 GHz (single core) |
| All-Core Turbo | 4.30 GHz (stock) |
| L3 Cache | 12MB |
| Memory Support | DDR4-2666 (JEDEC), higher via XMP |
| Memory Channels | Dual-channel |
| Integrated Graphics | Intel UHD Graphics 630 |
| PCIe Lanes | 16 x PCIe 3.0 from CPU |
| Socket | LGA1151 (Coffee Lake — NOT compatible with 6th/7th gen 1151 boards) |
| Chipset Required | Intel 300-series (Z370, Z390, H370, B360) |
| TDP | 95W |
| Overclocking | Unlocked multiplier |
| Includes | CPU only (no box, no cooler) |
$ system POST ............. OK $ CPU detected ........... Intel Core i7-8700K at 3.70 GHz $ core count ............. 6 cores / 12 threads $ turbo boost ............ reaches 4.7 GHz single-core as rated $ memory training ........ DDR4-2666 JEDEC stable $ last continuous runtime 3+ years in-service $ physical inspection .... IHS intact, no visible damage, lands clean
Pulled from a working desktop build. IHS intact, no bent pins on the CPU side (LGA1151 lands are clean), thermal paste residue wiped before shipping. No retail box, no cooler included. Ships in anti-static foam in a small box.
IMPORTANT SOCKET NOTE: the i7-8700K uses the LGA1151 socket but REQUIRES an Intel 300-series chipset motherboard (Z370, Z390, H370, B360). It will NOT work in 6th-gen (Skylake) or 7th-gen (Kaby Lake) LGA1151 boards (H110/B250/Z270) even though the socket looks identical — Intel changed pin assignments for Coffee Lake. DDR4 memory only (DDR4-2666 JEDEC, higher speeds via XMP on Z370/Z390). 95W TDP means a mid-to-high-end tower cooler or 240mm AIO is recommended, especially if you plan to overclock (the K multiplier unlocks overclocking in BIOS).
USPS Ground Advantage with tracking. Ships within 1 business day of cleared payment. Anti-static bag inside bubble mailer.
Pulled from a working desktop build. POSTs cleanly, detects as i7-8700K at rated 3.7 GHz base, hits 4.7 GHz turbo boost on single-core loads. I have not run a multi-hour Prime95 or stress test; buyer is welcome to run additional stress testing upon receipt and return within 14 days if any stability issue is found. IHS is intact (not delidded).
Requires Intel 300-series motherboard: Z370, Z390, H370, or B360. Will NOT work in older LGA1151 boards from Skylake/Kaby Lake generation (H110, B150, Z170, H170, B250, Z270) despite shared socket — different pin mapping. DDR4 memory only. Recommended cooling: mid-tier tower air cooler minimum (Hyper 212 or better), 240mm AIO preferred for sustained multi-core loads or any overclocking. No cooler included; install with your own thermal paste.
14-day return window. Item must be returned in original condition. Buyer pays return shipping.