Cpu amd am3 fxphenom iiathlon iisempron 100 series processors supports am3 32 nm cpu supports cpu up to 8 cores supports cpu up to 140 w amd cool n quiettrade technology chipset amd 990xsb950 memory 4 x dimm max 32gb ddr3 2133oc1866160013331066 mhz ecc non ecc un buffered memory dual channel memory architecture refer to asus or user manual for the memory qvl qualified vendors lists due to os limitation when installing total memory of 4gb capacity or more wind