faulty gpu or psu?

[newemailid]

My 5 year old HD 7950 has started giving vertical lines during load/playing games.
Now when i start heavy games like assassins creed origins/gears4/furmark i get vertical lines and computer just gets stuck with those lines.

I have to restart for it to work and sometimes it doesn't even work and i get black/blank screen.
I can see PSU, CPU, GPU fans running but i get to display and my mouse and keyboard don't light up too.
Now i have disconnected my GPU and it is running fine on intel i5 3570k.

Next day i boot up with my GPU installed and it works but after sometime it crashes again under load and few times i have seen even without load.

My gpu and psu are almost 5 years old.

GPU- sapphire HD 7950
PSU- corsair CX600

 

[Lutfij]

Can you please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

You may want to try using the GPU at your friends house with the same game titles at the same resolution and in-game settings to replicate the issue and see if the card does artifact. If so then it's a GPU issue, provided your donor/test system has more than 600W of power at it's disposal for the entire system.

At this pint, looking at the age of both the PSU and GPU, I'm speculating the PSU to be the faulty one if your test with the GPU is inconclusive.