Okay, so i have just baught myself 2 sticks of "Geil DDR2 1GB PC6400 CAS5 duel channel RAM" But when i place it in my computer i get constant long beeps, which according to my motherboard manual means DRAM error, so i tried both sticks in single channel mode (slot 1 and 3) and it works, i cant seem to get dual channel working at all. I've read up on it and ive heard about setting the speeds and voltage on the bios higher, because i have an old PSU. But i have no way of knowing how to do so or even if that is the problem. Could anyone help me? I have a gigabyte ga-m57sli-s4 motherboard PLEASE!