AMD Athlon X4 860K socket: Socket FM2+

What the Athlon X4 860K is

The Athlon X4 860K is the unlocked Kaveri quad on Socket FM2+ for budget tuning rigs without paying for graphics. It runs 4 Steamroller cores and 4 threads at 3.7 GHz base with turbo to 4.0 GHz. Four megabytes of L2 cache cover games. Power is 95 W on 28 nm from August 2014. No integrated graphics exist.

High stock clocks plus an open multiplier suit overclocking on A88X boards with tower cooling. Manual lifts past 4.0 GHz depend on silicon and VRMs. Power rises with voltage, so solid boards decide results. The 95 W envelope needs real cooling even at stock.

DDR3-2133 over two channels feeds four cores well. Boxed packs ship with a heatsink per the retail listing. Buyers pick the 860K where unlocked Kaveri threads must pair with a discrete card.

Socket and motherboard compatibility

The 860K fits Socket FM2+ on A88X boards with tuning BIOS options. A78 and A68H boards boot it but limit overclocking headroom. DDR3-2133 DIMMs match the stock turbo. A discrete card is mandatory for displays.

Dual channel fast DDR3 helps minimum frame times. The Socket vs chipset: what decides whether a CPU works guide covers AMD pairing. FM2 Richland boards never accept Kaveri.

Memory, PCIe and cooling

DDR3-2133 over two channels suits tuning rigs with SSDs. Fast pairs lift CPU bound games. DDR3-1866 works where modules exist.

PCIe 3.0 with 16 lanes from the APU feeds one mainstream card at full width. A Radeon card of the era matches unlocked clocks at 1080p. Chipset lanes handle storage.

Cooling uses the FM2+ mount with tower coolers for lifts past stock. The retail box ships a heatsink for stock operation. Monitor VRM heat during stress runs.

Upgrade paths

On the same socket, the AMD Athlon X4 840 at 3.1 GHz locked below saves cost and power, while the AMD A10-7700K at 3.4 GHz to 3.8 GHz with R7 graphics above adds an iGPU. All share FM2+ boards.

Godavari refresh quads cover newer tuning builds. The 860K remains the unlocked headless Kaveri lead.