Did I fry my gpu after reapplying thermal paste?

Sep 19, 2018
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So I have a Gigabyte Radeon r9 390 g1 gaming 8gb gpu which has always made a ton of noise while gaming and made my pc case really hot.
So after three years I decided to reapply the thermal paste. While doing so I noticed the thermal pads (strips really) were all broken and ripped, so I put them back as well as I was able, removed the dried thermal compound using rubbing alcohol and replaced it with new thermal compound (which was maybe a couple years old).
I booted my pc back up and it worked fine at first, getting 40-45C without the GPU fans spinning, so I decided to run a benchmark program. All of a sudden my gpu temperature went up really fast even when fans kicked in 100%. Then my pc shut off and rebooted itself, but the load screen had a big red bar on the left hand side and windows wouldn't boot anymore. Running a different gpu makes windows boot again so it's pretty clear I messed something up.
Fairly certain I just need to buy a new one but thought I'd ask some other people's opinion.
 

budgetgamer12345

Respectable
Sep 8, 2017
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Boot with your integrated graphics while your GPU is plugged into motherboard with power connectors plugged in. Then install DDU and remove the old drivers of your dedicated GPU, after that reinstall your dedicated GPU drivers while your monitor cable is plugged in to integrated graphics. Shut off your PC and connect your monitor cable again to your dedicated GPU.
 
Sep 19, 2018
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This is actually quite impossible. I can succesfully remove the drivers unsing DDU, but while reinstalling my screen will freeze and after a while the GPU fans will go on for less than a second and then go off again repeatedly. So I can't reinstall the driver completely.