Is it my MB, GPU, or PSU?

[kili808]

is it my MB, GPU, or PSU?
So everything was running perfectly and I go to start up my comp and I get no display. Everything is running but my gpu fans spins for a second and stops, repeatedly.
Two hours later after I gave up, the gpu decides to work. (I left it on for 2 hours)

If anyone could help me diagnose my PC so could order parts before it dies for good I'd highly appreciate it

Things I've done prior to it magically reviving:

Reseat ram and gpu
replug all cables
tested psu to gpu (steady 12 volts)
tested gpu on another MB(fans ran but no video)
remove CMOS battery 1 minute
Tried GPU in PCI-e x8 slot

My rig:
-Gigabyte 990fxa-ud3 rev 2.0
-FX-8350- recently installed and ran flawlessly for 2 weeks(temps 90 F).
-212 CM hyper Evo cooler
-Sapphire R9 270 2G OC
-CX600M
- 2x4GBCorsair vengance 1600 MHz
- 500GB WD black
- 100GB Kingston hyperfury SSD

And yes I've heard about the bad VRAM overheating with my Rev.2 MB paired with the 8350. my CPU never went above 100 F ( no OC). GPU temps never went above 120 F during gaming. Is it possible the VRAM heat is causing my video card to die?

 

[alexoiu]

According to your specs, the CX 600M is the 1st one to suspect. Not a match for the other components.

 

[kili808]

According to your specs, the CX 600M is the 1st one to suspect. Not a match for the other components.

Hi thanks for the response.
what isn't matching? do you mean not having enough power?

oh and I had this rig for roughly 2 years if that helps any

 

[alexoiu]

CX are mainly meant for office computers: http://www.corsair.com/en-us/power-supply-units

 

[kili808]

mm okay ill try a different psu to see its the problem