Okay I have a question. Here is the memory that I currently have: 512 MB Corsair XMS PRO model #: CMX512-3200C2PRO I want to add another stick but I need to make sure it has the same timing and everything. 1). The model # is the same on this one 2). But there is this one too Here is the main question: In my BIOS the memory timing is AUTO and it is currently: CAS latency 3 Min RAS active time 8T RAS to CAS delay 3T Row prechange time 3T Row to Row delay 2T According to Corsair's website my module should have timing of 2-3-3-6. Should I change the timing in my BIOS to this? If I do that I think I need to buy the first module that I listed. If I don't change the timing, will the second module work? I don't know much at all about changing memory timings, so I appreciate any help.