Faulty PSU? Motherboard? GPU? RAM?

[bryza100]

Hi everyone,

I recently upgraded my graphics card from a 560Ti to a 280x.

Upgrade initially went fine.

However... after running a stress test (Furmark and CPU stress test) with mild overclocking to the CPU,
the computer will now freeze and restart every time a 3D application is started.
I also tried putting my 560Ti back in the system, and this card causes the same problem now too.

I'm reasonably confident that I have overloaded the 12V output from my old PSU, and to this end have already ordered a gruntier replacement.

My question is, is there likely to be any other causes for this problem?

PC specs:
AMD Phenom II 955 BE
2x2GB RAM
MSI 880 GMA E45 motherboard
Radeon 280X
HDD, SSD, DVD etc...

(I know that my CPU/Mpbo is old... it is next on the upgrade list!)

 

[ksham]

What PSU do you have? Make and model please.

Though, your CPU is likely to bottleneck your GPU.

 

[bryza100]

Sorry PSU is ANTEC NeoEco 620W.

Yep, I know the CPU is bottlenecking the GPU - hence the overclocking.

 

[ksham]

The PSU looks good to me.

P.S.: the CPU will likely still bottleneck your GPU.