Intel Core i3-8350K socket: LGA 1151

What the Core i3-8350K is

The Core i3-8350K is a four core, four thread unlocked desktop processor from the 8th Gen Core family. It launched in October 2017 with a fixed 4.0 GHz at 91 W. Four cores with an open multiplier cover budget overclocking builds where a high fixed clock and tuning headroom matter more than thread count.

Eight megabytes of Smart Cache is the largest L3 in the Coffee Lake i3 set, which helps games that favor cache. The fixed 4.0 GHz gives strong single thread pace for its year, and the unlocked multiplier allows higher clocks on Z370 and Z390 boards with capable cooling. There is no Hyper-Threading and no Turbo table.

UHD Graphics 630 from 350 MHz to 1150 MHz drives displays for setup and office use. Gamers pair the chip with a discrete card, since integrated graphics cover setup rather than play. The process is 14 nm.

Intel sold the 8350K as the overclocker entry of Coffee Lake, near the price of the locked six core i5-8400 at launch. Buyers chose between four tuned cores and six stock cores. No cooler ships in the box, so a tower cooler is part of the build cost.

Socket and motherboard compatibility

The 8350K fits LGA 1151 revision 2 only. Z370 and Z390 unlock the multiplier for tuning, while H310, B360 and H370 run it at stock 4.0 GHz. Revision 1 boards with 100 or 200 series chipsets never support Coffee Lake, whatever the BIOS version.

The Socket vs chipset: what decides whether a CPU works guide explains board generations for LGA 1151. Makers list the 8350K on Z series support pages with memory guidance for DDR4-2400 and higher where the board allows it.

Pairing advice is simple: buy Z series for tuning, B series for stock 4.0 GHz offices with gaming potential. The locked Intel Core i3-8100 on the same socket is the lower cost quad core where tuning is not needed.

Memory, PCIe and cooling

DDR4-2400 is the official memory pace in two channels up to 64 GB. Z boards often run faster modules beyond spec, which helps minimum frame times in games. Two matched modules keep dual channel bandwidth near 37.5 GB per sec at stock.

Sixteen PCIe 3.0 lanes from the CPU feed a single graphics slot or NVMe arrays through board wiring. Budget gaming towers split use between a discrete GPU and a fast SSD. Integrated graphics cover extra displays for streaming setups.

Ninety one watts with tuning headroom needs a tower cooler, since no stock cooler ships. The 75 mm mounting pattern shares coolers with LGA 1155, 1150 and LGA 1200. Case airflow decides sustained tuned clocks more than board choice.

Upgrade paths

On the same socket the natural move is a six core Core i5-8600K for tuning with two more cores, or a Core i7-8700K for threads plus clocks. Both keep 300 series boards and DDR4. A BIOS that lists the new part is required before the swap.

Past LGA 1151 the path needs a new board, since later Intel sockets change pinouts. Tuners often keep the cooler and graphics card across the move. The 8350K holds value on the used market as a known tuning starter.