Asus Radeon Xpress 200 LGA775 Socket 939 ATX Motherboard (A8R-MVP &lt;GREEN&gt;) Support Socket 939 for AMD Athlon 64 FX/ Athlon 64 X2/ Athlon 64/ Sempron ATI CrossFire Xpress 1600 2000/1600 MT/s DDR 400/333/266, Max 4GB CrossFireXpress 1600 is -advanced chipset pumps an exceptional bandwidth of up to 2 GB/s to each GPU, delivering incredible graphics and blistering performance.