I have an intel DP45SG motherboard with 2 sticks of corsair cm3x 1024-1333c9 (1.60v ver1.11). I tried to add 2 sticks of corsair cm3x 1024-1333c9dhx (1.5v ver2.4) and my computer powers up but doesn't boot. I am wondering if they are not compatible. I do not think I can get the original memory sticks anymore as I built the computer several years ago. My hope is to get rid of mt Vista home edition (32bit) and do a clean install of Windows 7 home 64 bit. Can anyone help?