I have a 512mb stick of DDR400. It says that it's infineon. Does infineon even sell RAM? I thought they were just a supplier. I want to get another stick of 512 and from what I understand you should get the exact same kind. Also, does it matter if one stick has CL2 and the other CL3? And should I put the second stick in the 2nd or third memory bank? I'm not sure what to do.