AMD FX-8150 socket: AM3+

What the FX-8150 is

AMD FX-8150 is an eight core Zambezi processor that AMD released in October 2011 as the flagship of the FX launch. It uses the Bulldozer core design on a 32 nm process, running at 3.6 GHz base with Turbo Core to 4.2 GHz. The chip holds four Bulldozer modules with eight threads, 8 MB of L2 and 8 MB of shared L3. Power is 125 W. All FX parts ship with an unlocked Black Edition multiplier. The retail box carries part number FD8150FRW8KGU. The Orochi die holds about 1.6 billion transistors on 319 mm², with 16 KB of L1 data per core plus 64 KB of L1 instructions per module. The unlocked multiplier spans 4x to 21x on a 200 MHz reference clock.

High base clocks with eight threads and a 4.2 GHz maximum turbo made it the choice for threaded home work and tuning benches. Full loads sit at 3.9 GHz with half loaded bursts to the top rate. The 600 MHz turbo span matches the widest in the Zambezi range for single thread bursts. The 125 W budget needs a board and cooler rated for the top class.

Towers pair it with 990FX boards, 8 GB to 16 GB of DDR3 and a discrete card. The 4.2 GHz maximum turbo tops the Zambezi range for single thread bursts. The unlocked multiplier invites overclocking past stock on boards with strong delivery. The How to find your CPU socket type guide shows how to confirm the socket.

Socket and motherboard compatibility

The FX-8150 drops into AM3+ on 9 series boards. The 942-pin socket accepts 940-pin AM3+ chips and 938-pin AM3 chips, while AM3+ chips never fit AM3 boards. On AM3+ boards only DDR3 works, since no AM3+ board wires DDR2 slots. The maker CPU list decides each board BIOS.

Power at 125 W needs a board with delivery rated for 125 W or more, with 990FX the expected home. Southbridge chips SB950 or SB920 handle SATA and USB, with SLI plus CrossFireX multi GPU support. The Socket vs chipset: what decides whether a CPU works guide covers AMD pairing rules.

Memory, PCIe and cooling

Memory support is DDR3 up to 1866 MT/s, two channels, up to four DIMMs. Two matched modules feed eight threads. Boards with four DIMM slots reach 16 GB with matched kits for eight threads. HyperTransport 3.0 links tie the CPU to the chipset at up to 5200 MT/s.

PCI Express slots come from the 9 series chipset with PCIe 2.0, with 990FX offering full bandwidth for two cards. A high end card of the era matches the flagship eight core.

Cooling follows the 125 W rating with a large heatsink or tower cooler. Tuning wants headroom beyond stock cooling.

Upgrade paths

On Socket AM3+ the FX-8150 already tops the Zambezi range, so faster moves mean Vishera eight core parts where the BIOS lists them. Memory, storage and the graphics card carry over. A slower eight core comparison is the FX-8120 class on the same socket.

A platform move to DDR4 sockets needs a new board and RAM. Keep the AM3+ tower for tuned duty. Vishera eight core parts add efficiency on the same DDR3 DIMMs where the BIOS lists them. The unlocked multiplier still gives room past stock on boards with strong delivery.