-- Posted by Aimforthehead at 9:33 pm on Mar. 17, 2007 I have one gig of ram, two 3200 ddr400 512 megabyte sticks. I also have two used 3200 ddr400 512 megabyte sticks which work perfectly fine together. Then I bought one more 3200 ddr400 512 megabyte. On this computer, it won't work with basically anything over one gig. I don't know if it's my pc won't handle more than a gig(I doubt sense it has 4 slots) or the brands aren't compatible with each other. The mother board I use is a gigabyte K8NS Ultra-939. Any suggestions would be greatly appreciated. -- Posted by drifting at 9:41 pm on Mar. 17, 2007 I didnt look up the mobo, but I bet thats the case, I have one, and its a year or two (or 3.5) old and it WILL NOT use any ram over 1gb total. It would say in the instruction manual, but Im sure that is what it is, and BTW just because it has 4 slots doenst mean a thing, it could be 4 things of 256 that they want you to use! -- Posted by Aimforthehead at 9:42 pm on Mar. 17, 2007 Ah I looked it up and it holds up to 4 gigs :( It doesn't make any sense!