1 x Case CoolerMaster HAF 932 Full Tower Gaming Case - Black
1 x Processor Intel® Core™ i5-2500K Processor (4x 3.30GHz/6MB L3
1 x Processor Cooling Asetek 550LC Liquid CPU Cooling System (Intel) - ARC Dual Silent High Perfornamce Fan Upgrade (Push-Pull Airflow)
1 x Memory 16 GB [4 GB X4] DDR3-1600
1 x Video Card AMD R9 390
1 x Motherboard [SLI] ASUS P8P67 PRO -- 3x PCI-E 2.0 x16, On-Board Bluetooth
1 x Power Supply 1200 Watt -- Thermaltake TR2 TRX-1200M
Was playing a game and PC suddenly shut - when I restart it it refuses to have any display output on any of the available ports (DVI, DP, HDMI). No on-board video for Mobo so no way to test that.
It seems to be going through the boot process normally; that is, it appears that all fans, lights, HDDs etc are spinning up - taking a closer look it seems as though my GPU fans are not spinning up on boot.
I took out all RAM and tried booting - mobo detects no RAM and displays error light appropriately. I put in one stick only and it seems to go back to 'normal' but no output still.
I tried an older GTX 570 I had lying around and the fan spins for that but there is no video output through the DVI-D.
I'm thinking this is a PSU issue as this one has now outlived it's warranty by about a year and seems to have kicked the dust but it is hard to verify this is the case. I don't think it is both GPU failing because the R9 390 is not that old and the GTX 570 worked just a few months ago when I took it out of a different PC and stored it in a static-free bag safely away.
To summarize-
-mobo lights seem to be working fine (missing RAM, green 'ok' power when plugged in initially, etc)
-fans seem to be working (all case fans, but not R9 390 Fans, GTX 570 fan spins up)
-No display output after sudden shutdown mid-gaming session
Convince me this isn't or is a PSU issue and what further testing I should take, thanks for any help I really appreciate it.