New GPU causing intel q9550 to crash?

[AlmightyKeith]

So I've had a stable 3.4ghz overclock on my q9550, but ever since I changed to a new GPU, which uses less power and is better overall, my pc keeps crashing at the windows desktop.

My old Specs: Intel Core 2 Quad Q9550 @2.83 Ghz - 1333mhz FSB 12m Cache
Asus P5N-T Deluxe MB
8gb Gskill 1066mhz DDR2 (4 sticks)
GeForce Gtx 460 768mb running in SLI
LSP Ultra 650watt Power Supply
Antec NSK4482 Case
After Market fan and heatsink on the CPU

Now that I've added an EVGA 660 ti, the pc just crashes as soon as i hits the desktop, any way I could fix it?

 

[EarthDog]

Have you tried in installing drivers with DDU? Then try installing again. Have you tried different drivers? Updating the bios on your mobo?

What have you done so we don't suggest things you've tried already...

 

[Tech Tweaker]

I have a suspicion about that power supply. How old is your power supply?

Wasn't the Ultra LSP one of the models to avoid?

http://forums.anandtech.com/showthread.php?t=2247863

http://www.overclock.net/t/874366/problem-with-ultra-lsp-650-watt-psu-wont-boot-after-restart

 

[AlmightyKeith]

Thanks guys I reinstalled the driver and it stopped crashing