Big Problem with overheating after applying thermal paste

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The One0

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Hello,my gpu is a Sapphire Radeon HD 7970 GHZ edition and it overheats a lot after reapplying thermal paste.
It was working fine before,but it was overheating and i had to do it,but it got even worse after doing it so.
My GPU reaches 80c while watching videos and even browsing which is annoying because the temp. decreases and after a few seconds it increases and the fan is going crazy and it's super annoying.
I tried to run furmark but it lasted 1 second before it shut down ( i'm serious) i also tried to play some games and it shut down after about 5 minutes
But what i find strange is that the gpu cooler blows cold air and the whole pc is actually pretty cool.(cpu is about 30c)
I also want to say that the air flow in my case is very good(the case is a corsair graphite 780t) and i applied the thermal paste the right way.
Please help me,this problem is driving me crazy finding for a solution.Thanks.
 
Solution
bailojustin
It might not be your GPU die that is hot, the memory chips on the card are often sanwhiched between the heatsink and card, There should be small thermal pads located over the top of the VRM's and the Memory Chips, this is EXTREMELY important.

If your VRM's are overheating, they control all power to the card and regulate it, causing unstable power can cause those spikes aswell as damage to the card. I would remove the heat sink, reapply thermal paste after cleaning it very well. make sure all the VRM and Memory has the thermal pads on them.

Make sure your fans are running properly. this can be seen using gpu monitoring software, and seeing what the TACHOMETER states your FAN RPM is. if its under 1,000 most likely your fan has died, It...
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bailojustin

bailojustin

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It might not be your GPU die that is hot, the memory chips on the card are often sanwhiched between the heatsink and card, There should be small thermal pads located over the top of the VRM's and the Memory Chips, this is EXTREMELY important.

If your VRM's are overheating, they control all power to the card and regulate it, causing unstable power can cause those spikes aswell as damage to the card. I would remove the heat sink, reapply thermal paste after cleaning it very well. make sure all the VRM and Memory has the thermal pads on them.

Make sure your fans are running properly. this can be seen using gpu monitoring software, and seeing what the TACHOMETER states your FAN RPM is. if its under 1,000 most likely your fan has died, It might still be spinning and looking like its working, but its dead and very inefficient.

You might have over tightened your sink mounting to the card. GPU cards heatsinks utilize a VERY SPECIFIC torque on the screws to ensure that it fits perfectly, not to tight, not to loose.

 
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The One0

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i can confirm you that the heatsink is properly sealed(just like it was before) and i probably used the right amount of thermal paste ( i made a x on the chip)
 
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The One0

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thank you for helping ! i'm going to try this because it actually makes sense and the memory chips don't have any thermal pads on them.i was told that it's going to work fine without them,looks like not,
thanks again :D
 
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bailojustin

bailojustin

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its EXTREMELY important, otherwise your card will die. I WOULD NOT use the card until you can get thermal pads on your memory and VRM. Glad I could help.
 
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they were dirty as hell and i thought it was a better idea to remove them and put thermal paste instead.
 
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R_1

R_1

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https://www.amazon.com/COOLOOdirect-15x15x1mm-Silicone-Conductive-Northbridge/dp/B074K55CWF?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-ffsb-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B074K55CWF
https://www.amazon.com/SPHINX-100x100x2-Heatsink-Conductive-electronics/dp/B01A9RHAH4?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-ffsb-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B01A9RHAH4

make sure to get the proper thickness the top links to 1mm thick, the second to 2mm. I have seen .5mm thick. ensure the proper thickness, not too thin, not too thick.
 
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bailojustin

bailojustin

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^^ I agree. MAKE SURE THEY ARE THE PERFECT SIZE. Anything other than the perfect size will cause huge cooling issues, like what you are facing now. as a tip in the future, never put thermal paste on any chip other than a lidded CPU or GPU. that metal thing over the CPU is actually just a cover thatspreads the heat for thermal paste to do an efficent job.

Thermal paste on a memory chip works the complete opposite, it works as an insulating blanket,.
 
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The One0

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thanks for helping again :D
 
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