I recently tried to upgrade my CPUs on my z800 to two Intel Xeon w3690 chips. Upon pressing the start button on my computer I hear the regular two beeps and my power button is green. Get some green flashing lights from my DVD drive. Then the fans start going full blast for over 5 minutes (unusually long, despite the regularly long boot time due to me having 96gb of ram installed) with no video signal. I eventually turned it off, as I was worried something might be seriously wrong. Any ideas as to what to do aside from reinstalling old CPUs over again?