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How much of an impact can replacing thermal paste in a GPU do? - Page 5

post #41 of 78
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Yeah, your paste definitely looks like it had more than mine.

And wow, dropping 5C at such low temps is a huge improvement! Assuming room temps of 22C, you improved your delta from 39C to 34C. That's like a 13% improvement, for free effectively.

I'd be honest and say that the 4C reduction I see from 89C to 85C is a tad disappointing, but I'd put it down to me using lower quality thermal paste compared to yours. I did do the same to my CPU as well using this paste (which had stock paste for 3.5 years), and even there I only saw reductions of 2C.
post #42 of 78
I put Noctua NT-H1 thermal paste on my PNY GTX 980 reference cooler gpu and had a 9c drop in temps.
I only apply the paste the size of a grain of rice, not the size of a pea as that is to much.
the paste doesn't need to cover the entire gpu as the paste is just making a better connection (you might say) to pull the heat from the gpu and transfer it to the heat sink.
Intel has a video on their way of applying thermal paste and they also use a small amount the size of a grain of rice.
back in 2010 I also replaced the paste on my 2 GTX 580's and had a 11c drop.
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post #43 of 78
Quote:
Originally Posted by jlhawn View Post

I put Noctua NT-H1 thermal paste on my PNY GTX 980 reference cooler gpu and had a 9c drop in temps.
I only apply the paste the size of a grain of rice, not the size of a pea as that is to much.
the paste doesn't need to cover the entire gpu as the paste is just making a better connection (you might say) to pull the heat from the gpu and transfer it to the heat sink.
Intel has a video on their way of applying thermal paste and they also use a small amount the size of a grain of rice.
back in 2010 I also replaced the paste on my 2 GTX 580's and had a 11c drop.

Yea thats a lot of misinformation sorry haha.

On a die, ANY die you want full coverage. Especially on a gpu, same thing for a cpu die under the IHS. If the corners off your gpu have no paste on them at all wtv is under that section MIGHT not be getting any good contact with the cooler.

Now if you put a grain of rice and it spreads evenly all over the die then thats perfect, but if you have some areas with no paste thats not good.

THere is a HUGE difference between pasting a die and pasting an IHS.

Btw check out the linus video on paste, no such thing as too much. The cooler/heatsink ends up spreading the paste anyways, HOWEVER there is a thing as too little paste.
    
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post #44 of 78
Quote:
Originally Posted by bluej511 View Post

Yea thats a lot of misinformation sorry haha.

On a die, ANY die you want full coverage. Especially on a gpu, same thing for a cpu die under the IHS. If the corners off your gpu have no paste on them at all wtv is under that section MIGHT not be getting any good contact with the cooler.

Now if you put a grain of rice and it spreads evenly all over the die then thats perfect, but if you have some areas with no paste thats not good.

THere is a HUGE difference between pasting a die and pasting an IHS.

Btw check out the linus video on paste, no such thing as too much. The cooler/heatsink ends up spreading the paste anyways, HOWEVER there is a thing as too little paste.

Whatever, there is such a thing as too much thermal paste.
from here:
http://www.hardwaresecrets.com/how-to-correctly-apply-thermal-paste/

Edited by jlhawn - 6/5/16 at 11:10am
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post #45 of 78
Wow, this thread is horrible!

Repasting your GPU shouldn't yield more than 5*, assuming the manufacturer put paste on the card, and unless you remove the IHS.

Less thermal paste is better - always. The point of a paste is to fill the gaps between two surfaces. In an ideal scenario, you would not want to use any paste at all and allow the two perfectly machined surfaces to adhere together in their ideal design. This is impossible, so we use paste to fill the gaps.

With a bare die it is important to cover the entire surface with as little paste as possible because the die itself is outputting heat across its entire surface. With an IHS this is less important because the die (the actual heat source) is only making contact with part of the IHS - the rest of the IHS is merely capturing heat from the point where it makes contact with the die.

Finally, for the OP: as you've seen, thermal paste will help but it is not your solution. You need to purchase a new chassis, or heavily mod the one you own.

Without any intake fans to draw cool air in to the chassis, you essentially have a heat trap - components get hotter and hotter during use and recirculate that heat again and again, while your tiny exhaust fan tries to push heat out. In this way, components never get cool, fresh air to breathe and are instead left to choke on their own heat.

For example, you are comparing your card's temperatures to another user and are confused by how much better their results are. It is true that a difference in ambient temperature accounts for basically that exact difference in ambient temperature, but as math explains, that is not the whole story, as somehow your temperatures are still worse despite accounting for the difference in ambient temperatures.

Why? Because the other user has a much more open chassis with several intake fans in what looks to be a positive air pressure setup. This ensures that components are fed cool, fresh air and that heat is directed outside of the chassis before it has the opportunity to recirculate/reheat in the chassis.

Long story short: even a Fractal Core 1000 or similar low-end case with stock fans will probably knock at least 10* off of that card. With some thoughtful planning and decent fan purchases you can probably do even better.

P.S. Removing the side panel is not enough! All this does is open up the chassis so that the GPU has access to cooler air - it does not create an environment in which cool air enters and hot air leaves nor does it ensure that the GPU is getting a great enough volume of cool air to stay cool.
Edited by claes - 6/5/16 at 12:13pm
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post #46 of 78
Quote:
Originally Posted by claes View Post

Wow, this thread is horrible!

Repasting your GPU shouldn't yield more than 5*, assuming the manufacturer put paste on the card, and unless you remove the IHS.

Less thermal paste is better - always. The point of a paste is to fill the gaps between two surfaces. In an ideal scenario, you would not want to use any paste at all and allow the two perfectly machined surfaces to adhere together in their ideal design. This is impossible, so we use paste to fill the gaps.

With a bare die it is important to cover the entire surface with as little paste as possible because the die itself is outputting heat across its entire surface. With an IHS this is less important because the die (the actual heat source) is only making contact with part of the IHS - the rest of the IHS is merely capturing heat from the point where it makes contact with the die.


Finally, for the OP: as you've seen, thermal paste will help but it is not your solution. You need to purchase a new chassis, or heavily mod the one you own.

Without any intake fans to draw cool air in to the chassis, you essentially have a heat trap - components get hotter and hotter during use and recirculate that heat again and again, while your tiny exhaust fan tries to push heat out. In this way, components never get cool, fresh air to breathe and are instead left to choke on their own heat.

For example, you are comparing your card's temperatures to another user and are confused by how much better their results are. It is true that a difference in ambient temperature accounts for basically that exact difference in ambient temperature, but as math explains, that is not the whole story, as somehow your temperatures are still worse despite accounting for the difference in ambient temperatures.

Why? Because the other user has a much more open chassis with several intake fans in what looks to be a positive air pressure setup. This ensures that components are fed cool, fresh air and that heat is directed outside of the chassis before it has the opportunity to recirculate/reheat in the chassis.

Long story short: even a Fractal Core 1000 or similar low-end case with stock fans will probably knock at least 10* off of that card. With some thoughtful planning and decent fan purchases you can probably do even better.

P.S. Removing the side panel is not enough! All this does is open up the chassis so that the GPU has access to cooler air - it does not create an environment in which cool air enters and hot air leaves nor does it ensure that the GPU is getting a great enough volume of cool air to stay cool.

Correct but as ive stated the pressure from the IHSor heatsink or gpu cooler will press out the thermal paste. As ive said there actually IS such a thing as too little. Check out the linustechtips video youll see why. Too little will end up spreading and be TOO thin and then youend up with poor contact. Its why we dont spread paste only liquid metals. The pressure from the source will press down on it. Trust me ive tried this many times on many gpus and WITH pressure paper.
    
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post #47 of 78
my 980 and 580's are reference cooler gpu's so yes the thermal paste was awful, they had so much it was hanging over the gpu so when I applied the thermal paste the correct way I saw a big improvement in temps. now my Gigabyte G1 Gaming GTX 970 has great temps already so there is no need to change the thermal paste as of yet as it is not a reference card..
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post #48 of 78
Quote:
Originally Posted by jlhawn View Post

my 980 and 580's are reference cooler gpu's so yes the thermal paste was awful, they had so much it was hanging over the gpu so when I applied the thermal paste the correct way I saw a big improvement in temps. now my Gigabyte G1 Gaming GTX 970 has great temps already so there is no need to change the thermal paste as of yet as it is not a reference card..

This is why you cover an entire gpu

And again there is no such thing as too much paste its been proven REPEATEDLY.
    
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post #49 of 78
post #50 of 78
either way you apply thermal paste only makes a 1c to 3c difference under load, you can see the rice grain size is 3rd best in temp even.

Edited by jlhawn - 6/5/16 at 12:30pm
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