i have done a clean install of win 7- 64 bit and it wont boot up, the pc runs but blank screen, i take the new 8 gig of ram out and put the 4 gig back and all is good again. can anyone shed some light on this, henry
Did you have the new RAM in your system during the clean install of windows 7? Are you getting a POST from the BIOS or is the blank screen occurring as soon as you hit the power button?
Take one stick of your new RAM and place it into the first slot. Now see if your system works. Test out each slot on your motherboard with the one stick. After that test, try the other new sticks of RAM you have as well. Trying to narrow down the problem to possibly a bad stick or slot.