I bought new RAM for my old Motherboard GA-M61PME-S2P and was VERY careful to make sure it was compatible, in fact, its Samsung, and Marked the same as my Old RAM, which was 2 gb, only this is 2 sticks of 4 gbs each for 8 gbs total. If I put in both, it won't boot up at all... I hear the drive whirring but the monitor will just flick on for a second and go back to sleep mode. If I only put one stick in, it will boot up, it recognizes the RAM in BIOS and Windows, will work for a few minutes, and BAM, Blue Screen crash. I'm using the Chipset AMD Athlon 64 x 2 5600+ 2.90 GHz with Windows 7 Home Premium 64 bit, and the Memory I bought was Samsung 8GB 2x4GB DDR2 PC2-6400 800MHz. ALL of that is supposed to be compatible as is. I'm lost as to why it's doing this, I read thru a few other older posts but didn't see anything quite like this. What do I do ? Thanks for any and all help !