Along with its first triple-core APU, the A6-3500, AMD released the first Athlon branded processor in the socket FM1 package. The Athlon X4 631, as it's called, is a quad-core processor. Notice I said processor and not APU, because this chip lacks the integrated graphics core. Or at least it's there on the silicon and permanently disabled. The processor still has integrated dual-channel DDR3 memory controller, and more importantly, the integrated PCI-Express 2.0 root complex. The Athlon X4 631 has its four x86-64 cores clocked at 2.60 GHz, lacking TurboCore. There is 4 MB of total cache, arranged as 1 MB dedicated L2 cache per core. The processor has a rated TDP of 100W, above the 95W TDP of the socket AM3 Athlon X4 chips, but given that the northbridge is completely fused with the processor, the 5W TDP jump is fair. The chip is compatible with all socket FM1 motherboards based on the AMD A55 and A75 chipsets. It is priced at US $79 a piece in 1000-unit tray quantities.