PC freeze after Catalyst install?

[Stayfr0sty]

Hi, im new to the forums but have been known about them for a while.
Anyways I just rebuilt my rig, due to it malfunctioning after having it shipped from Europe to the states.

Im posting here in the PSU section cause I suspect this may be a PSU issue.
Ill explain.

I can install windows fine and everything seems ok, but as soon as I install catalyst video driver, upon reboot, system hangs at the windows loading screen, no bsod or anything, hdd activity just stops and it stays like that. Reason I suspect its PSU is cause I originally thought it was a deformed PCI express slot on my old setup, but now im thinking it was PSU after all.
System specs are:

Phenom II X6 1055
8GB Gskill DDR3 1600 RAM
Gigabyte GA-970A-UD3 mobo
ATI 5970 video
Velociraptor boot drive
WD Blue 640GB storage drive
Pioneer 215 optical drive
Thermaltake toughpower 775W PSU

So what do you all think? I really dont want to buy a PSU and then find out that its not the problem. Thank you ahead of time.

NOTE: I can boot into safe mode just fine, just doesnt wanna go past loading screen in normal boot.

 

[jonnyGURU]

It's not the power supply. Definitely if the PC is freezing at the Windows screen.

If the PSU were to have a problem like low voltage, etc., the PC would likely reboot if the PSU didn't detect the low voltage drop and shut itself off.

If the PSU was to experience a problem like an overload, low voltage, short circuit, etc. it would shut off.

 

[Stayfr0sty]

Well, thats it, it was shutting down at that screen with my prevous mobo.
Now with new mobo it just freezes. I went ahead and ordered new PSU anyways, my theory is that PSU has something defective from the shipping and is causing this, im pretty sure its he problem, I tested everything and they all passed, memtest, hdd diagnostics, CPU and mobo are brand new.... will post update when it arrives.

NOTE: Im thinking also what if its the video card thats defective? I dunno. Its a Diamond card and their RMA page doesnt even work, if the new PSU doesnt solve it should I try calling Diamond? In any case I dont get it, if it were video card how can I be getting any display at all? Ohh, boy I sure hope its not the video, this thing is irreplaceble.

 

[Stayfr0sty]

UPDATE:
Nope its not PSU. Same thing is happening with new PSU.
Time to RMA video card