Is it time for an upgrade/replacement? Horizontal lines on login screen.

[Reprisal35]

After reading around and getting assistance, it seems that my GPU (AMD HD 7850 2GB) is finally failing on me. I'm getting horizontal lines on the login screen, and if I attempt to log in, or leave it running for a minute, the computer crashes. I've yet to get a BSOD, it's literally just a straight crash into a reboot. I can boot in safemode just fine, and I can boot normally if I uninstall the driver. I used AMD's uninstall utility and DDU, followed by a registry sweep using CCleaner to uninstall the drivers. I attempted to install several drivers using the full installation, and just the driver itself (no CCC), 13.12, 14.12, 15.7.1, 15.9.1, etc, and they all have the same issue. I can't do a fresh OS install as I need a method of backing up my current drive, so that's not an option currently.

Is there anything I can do to attempt to fix this issue or is the card straight up dying and needs replacing? Computer is a little over 3 years old, so I was expecting something to die, just not a couple of months after the warranty expired...

Current specs:
Intel® Core™ i7 3820 Processor (4x 3.60GHz/10MB L3 Cache)
Liquid CPU Cooling System
16 GB [4 GB X4] DDR3-1600 Memory Module - G.Skill Ripjaws
AMD Radeon HD 7850 - 2GB - Single Card
[3-Way SLI] Gigabyte GA-X79-UD3 -- 4x PCI-E x16, 6x SATA 6Gb/s
700 Watt Power Supply - Standard
120 GB OCZ Agility 3 SSD - Single Drive
1 TB HARD DRIVE -- 32M Cache, 7200 RPM, 6.0Gb/s - Single Drive
Windows 7 Home 64bit

Picture of what I'm experiencing:

 

[Supahos]

Only things left to try are reseating the card and ensuring the power plugs are installed innit well. Unlikely to be the issue but its one more free thing to try.

 

[Reprisal35]

Sorry for the late response, work has been a pain.

I reseated the card and made sure the power plugs are correctly placed, still the same issue. Anything else I should attempt?

 

[archvince]

Same thing happened to me just a week ago, after asking around and reading, I've narrowed down the problem to either my PSU or my GPU (7870). If I were you, one last thing i'd try before getting a replacement is installing your gpu in another system or borrowing another gpu from a friend and installing it in your PC. That way you can know for certain which part to replace.

 

[Reprisal35]

I tried placing it in different PSI slots and still the same thing. I was looking to buy a new a GPU regardless, so I guess it still works out.

Anyways, I bought a new GPU, MSI GTX 970, and it worked just fine! No more lines, thanks for the advice!