can i fit 2x 1gb corsair ddr400 ram to a asus a8n sli premium sockrt 939 nvidia nforce4 sli atx amd motherboard? if so could i also fit an amd athlon 64 x2 4600+ manchester 2000mhz ht2 x512kb l2 cache socket 939 dual core processor? if so how much would all these parts cost? i am trying to build a great gaming pc + need help. would i need to buy any other parts (chips etc). any help would be much appreciated...thank you