Hello. I was using a triple channel set up of 3x2gb ram. Had 3 more slots spare so decided it was time for a upgrade. Bought a dual channel 2x4gb Ti use in two of the remaining 3 slots. Now when I turn my pc on it boots, gets to the green loading bar for windows then the screen goes blank. I can hear the windows music and can even type my password in to launch my profile. Checked bios (because it doesn't go blank till I get further in) and it says I have the full 14gb ram. Just wondered if anyone here has encounted the same problem or knows where I went wrong. Thanks.