NereusHixon
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Hi folks, I see that there MOSFETS and Inductors on left and right hand side of the 3080Ti PCB. Does the right hand side one's require more cooling than the left ? The reason I ask this is because ICX sensors are not present (I guess) for the ones on the left. I see PWR1, PWR2, PWR3 and PWR5 in Precision X1, but nothing for the ones on the left. Yesterday, I was swapping the thermal pads on the card and looking at it after assembling feels like the inductors on the left are not in proper contact with the thermal pad. Will leaving them as is cause any heating problems ? The MOSFETS are having good contact. Imgur: The magic of the Internet  edit Cool GTX added photo in post
post edited by Cool GTX - 2021/10/10 12:55:10
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staypuft
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/06 16:50:32
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Very strange that there is not a single sensor on the left bank of VRM. I would expect that all phases of the GPU power delivery would require equivalent cooling, as it is expected that the load is shared equally amongst them. What does the compression on your pads look like, left vs right?
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NereusHixon
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/09 19:29:01
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staypuft
Very strange that there is not a single sensor on the left bank of VRM. I would expect that all phases of the GPU power delivery would require equivalent cooling, as it is expected that the load is shared equally amongst them. What does the compression on your pads look like, left vs right?
Yea I just decided to stop being lazy and re-padded card. Now it seems like I have proper coverage over the mosfets and inductors. Used 2.5mm (Stacked 2mm and 0.5mm) GELID GP Extreme over Memory Chips and Inductors & 1mm over MOSFETS. But yea I am still unsure why EVGA do not have sensors on the left bank columns of MOSFETS and Inductors on the PCB and subsequently on X1
post edited by NereusHixon - 2021/10/09 19:30:11
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MDG73
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/10 09:43:47
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NereusHixon
staypuft
Very strange that there is not a single sensor on the left bank of VRM. I would expect that all phases of the GPU power delivery would require equivalent cooling, as it is expected that the load is shared equally amongst them. What does the compression on your pads look like, left vs right?
Yea I just decided to stop being lazy and re-padded card. Now it seems like I have proper coverage over the mosfets and inductors. Used 2.5mm (Stacked 2mm and 0.5mm) GELID GP Extreme over Memory Chips and Inductors & 1mm over MOSFETS.
But yea I am still unsure why EVGA do not have sensors on the left bank columns of MOSFETS and Inductors on the PCB and subsequently on X1
How has your temps been since the replacement?
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Cool GTX
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/10 12:53:54
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stacking thermal pads hurts thermal conductivity ... best to use correct size pad
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Cool GTX
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NereusHixon
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/10 17:56:14
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MDG73
NereusHixon
staypuft
Very strange that there is not a single sensor on the left bank of VRM. I would expect that all phases of the GPU power delivery would require equivalent cooling, as it is expected that the load is shared equally amongst them. What does the compression on your pads look like, left vs right?
Yea I just decided to stop being lazy and re-padded card. Now it seems like I have proper coverage over the mosfets and inductors. Used 2.5mm (Stacked 2mm and 0.5mm) GELID GP Extreme over Memory Chips and Inductors & 1mm over MOSFETS.
But yea I am still unsure why EVGA do not have sensors on the left bank columns of MOSFETS and Inductors on the PCB and subsequently on X1
How has your temps been since the replacement?
I saw gpu temps improve by 8c. I think it was because of the 'looser' mount on the gpu die because of stiffer thermal pads.
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NereusHixon
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/10 18:04:48
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Cool GTX
stacking thermal pads hurts thermal conductivity ... best to use correct size pad
GELID GP Extreme's do not come in 2.5mm sizes I guess. At the moment, I am seeing amazing temperatures overall even though I have stacked thermal pads.
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rjbarker
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Re: Information needed for MOSFET and Inductor cooling on the PCB of a 3080Ti FTW3
2021/10/10 20:02:31
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NereusHixon
Cool GTX
stacking thermal pads hurts thermal conductivity ... best to use correct size pad
GELID GP Extreme's do not come in 2.5mm sizes I guess.
At the moment, I am seeing amazing temperatures overall even though I have stacked thermal pads.
For what its worth when I took the Water Block off of my 3080 FTW3 (to re-install stock air cooler), I used all new stock Evga pads (they sent them to me) along with a tube of the stock putty and saw a significant improvement in temps....perhaps not 8c, but was defintely 5-6c...I also used Hydronaut on the chip. Could be how I always "very firmly" tighten all screws, when I disassembled the Card I found the screws werent as tight as I normally secure them.
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NereusHixon
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