Originally Posted by Icewolf
mine is DDR2 3200, but the ram i bought is DDR2 5200 but it says its compatible with 3200 so thats why i bought it (my comp is old =/)
Well, technically it's compatible yes, however they are drastically different speeds so they may not have been entirely compatible - it's generally best to buy RAM in sets if you plan on using multiple sticks together.
Try the new stick on it's own, and it should work fine (presuming your motherboard supports it). If you still have problems then I would assume there's something up with the new RAM.