ok firstly i am using kingston ram 667mhz 2 gb in dual channel on abit ip35e mobo. i want to shift to 800mhz 2 or 4 gb. brands i am considering are gskill, ocz and corsair only. dont mind getting from kmd as well. budget for 2gb is 3k and 4gb is 5k. please update fast with ur answers and help me. should i get 1066mhz will my mobo support it ? what are the costs involved. i would like 3gb total on my pc since i am using vista 32bit. but i guess if i use 4gb the 4th wont work at all right ???