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Reducing My VEGA 64 Hot Spot Temperature?

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post #1 of 11 (permalink) Old 04-19-2019, 05:59 PM - Thread Starter
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In my corsair 900D case, the air flow wasn't very good. Radiator fans set the exhaust and 2 TY 140's as intake.

My Vega 64 ASUS Strix undervolted reached 85c core, 107c hot spot, 115c VRM.

Since using better thermal pads on the VRM, and adding pads between the PCB and backplate, and replacing stock fans for a pair of Corsair SP120's, the core is now 57c. Hot spot 87c, 73c VRM.

Core and VRM has a massive improvement. Hot spot is still too warm for my liking. How can I reduce it more?

Here's my current setup in my new X71 Core with Noctua 140's as intake. I get the same temps with the X71 chassis by the way. See attachment. Thank you.
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post #2 of 11 (permalink) Old 04-19-2019, 06:22 PM
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Nice looking setup.
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post #3 of 11 (permalink) Old 04-20-2019, 09:09 AM - Thread Starter
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Thank you.

Other than watercooling the GPU, how else could I reduce the hot spot temperatures more? 87c is still a little too warm for me. I'd be much happier with 80c.

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Last edited by BradleyW; 04-20-2019 at 02:04 PM.
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post #4 of 11 (permalink) Old 04-20-2019, 09:31 AM
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Quote: Originally Posted by BradleyW View Post
Other than watercooling the GPU, how else could I reduce the hot spot temperatures more? 87c is still a little too warm for me. I'd be much happier with 80c.
You can't.
Because no one knows exactly what the 'hotspot' is to begin with.
Someone said it was the hottest temp the GPU registered. But that can't be true. Another person said it's some sensor around the die and interposer, possibly on the PCB backside.
Even W1zzard didn't know what the hotspot is.
Regardless, you can't do anything about it. The cooler the GPU and HBM and VRM's are, the cooler the hotspot will be. That's all you can do.

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post #5 of 11 (permalink) Old 04-20-2019, 10:10 AM - Thread Starter
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Quote: Originally Posted by Falkentyne View Post
Quote: Originally Posted by BradleyW View Post
Other than watercooling the GPU, how else could I reduce the hot spot temperatures more? 87c is still a little too warm for me. I'd be much happier with 80c.
You can't.
Because no one knows exactly what the 'hotspot' is to begin with.
Someone said it was the hottest temp the GPU registered. But that can't be true. Another person said it's some sensor around the die and interposer, possibly on the PCB backside.
Even W1zzard didn't know what the hotspot is.
Regardless, you can't do anything about it. The cooler the GPU and HBM and VRM's are, the cooler the hotspot will be. That's all you can do.
So actually what you've just said is, I can lower the hot spot, by lowering the temperature of the other components. So I'll rephrase, how can I reduce the temperature of everything apart from the hot spot? (Which in turn will lower the hot spot).

Better fans on the heat sink? Install the rajintek cooler? Better fans on the case intake?

Cheers.

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post #6 of 11 (permalink) Old 04-20-2019, 10:43 AM
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Did you replace the thermal paste? I re pasted my Strix 56 with Grizzly Kryonaut and changed the pads also and it lowered all my temps. Undervolting the is what helps the most, what are your P6/P7 settings?

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post #7 of 11 (permalink) Old 04-20-2019, 10:54 AM
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We know what hot spot is thanks to RVII. It is the hottest temp in the center of the die. While GPU temp is the edge of the die temp.

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post #8 of 11 (permalink) Old 04-20-2019, 11:51 AM - Thread Starter
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Quote: Originally Posted by Maracus View Post
Did you replace the thermal paste? I re pasted my Strix 56 with Grizzly Kryonaut and changed the pads also and it lowered all my temps. Undervolting the is what helps the most, what are your P6/P7 settings?
I certainly did. It didn't help much. The only thing that's made a real difference is ditching the stock fans for a pair of SP120's.

Quote: Originally Posted by Alastair View Post
We know what hot spot is thanks to RVII. It is the hottest temp in the center of the die. While GPU temp is the edge of the die temp.
That's interesting. So this applies to Vega 56/64?

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post #9 of 11 (permalink) Old 04-20-2019, 01:00 PM
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Quote: Originally Posted by BradleyW View Post
I certainly did. It didn't help much. The only thing that's made a real difference is ditching the stock fans for a pair of SP120's.



That's interesting. So this applies to Vega 56/64?
RVII is VEGA. Just shrunk from 14 to 7nm.

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post #10 of 11 (permalink) Old 04-20-2019, 02:09 PM - Thread Starter
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Quote: Originally Posted by Alastair View Post
RVII is VEGA. Just shrunk from 14 to 7nm.
I just wanted to double check. Thank you.

Would the Raijintek be a waste of money? I thought about switching the SP120's which are attached to the card for a pair of EK Vardars

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