I was running 2 x PC2-6400 C4 Corsair sticks without issue. Due to overclocking the RAM is actually being run below spec. at 720Mhz.<BR><BR>I picked up some Crucial RAM, same spec. and I can't get 4 ...

Motherboards have different slots for RAM installation. If your motherboard has 4 RAM slots and you are installing 2 RAM sticks, you cannot install them in any RAM slot. We suggest you refer to the ...