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Old 17-05-20, 09:18 AM
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First GPU in loop order running hotter.

Hi all,

I made a very rudimentary picture of my loop you can see below.



Now I am confused and I'd hoped you guys you clear things up for me.

As you can see the loop runs clockwise and GPU2 receives coolant directly from a radiator, however, on avergae it runs 3-5 degrees hotter than GPU1 which receives the coolant after GPU1.

I expected one card to run hotter than the other but thought it would've been the other way round, that GPU1 would be hotter as it gets the coolant after GPU1.

I had considered that maybe GPU2 is just a hotter running card (or less of a silicon lottery winner) but wasn't sure if that was possible as GPU1 is a 2080, GPU2 is a 2070 Super.

Opinions and thoughts?
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Old 17-05-20, 09:24 AM
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I think the difference is likely to be internal airflow and gpu2 is a restricted flow.
You could always swap the cards around, but that would be a bit of a pita.
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Old 17-05-20, 09:25 AM
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3-5 degrees on the water is margin of error. Different cards, different blocks... Don't get fussed about it.
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Old 17-05-20, 09:30 AM
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Quote:
Originally Posted by RobM View Post
I think the difference is likely to be internal airflow and gpu2 is a restricted flow.
You could always swap the cards around, but that would be a bit of a pita.
Quote:
Originally Posted by Avet View Post
3-5 degrees on the water is margin of error. Different cards, different blocks... Don't get fussed about it.
They are exactly the same blocks though which is why I was a bit confused!
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Old 17-05-20, 10:28 AM
Warchild Warchild is offline
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GPU2 probably has less air flow running over the back so its a little warmer.

You have a pocket of warm air between the GPUs while GPU 1 has open space above it.
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Old 17-05-20, 10:33 AM
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So ultimately, nothing to worry about?
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Old 17-05-20, 10:35 AM
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Quote:
Originally Posted by trawetSluaP View Post
So ultimately, nothing to worry about?
I would not be concerned unless it was 10c+ difference
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Old 17-05-20, 10:49 AM
Warchild Warchild is offline
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Quote:
Originally Posted by trawetSluaP View Post
So ultimately, nothing to worry about?
Nothing what so ever.

there was a 2Degree difference in my 1080ti SLI. I ran mine clockwise like you did.
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Old 17-05-20, 10:51 AM
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Quote:
Originally Posted by RobM View Post
I would not be concerned unless it was 10c+ difference
Quote:
Originally Posted by Warchild View Post
Nothing what so ever.

there was a 2Degree difference in my 1080ti SLI. I ran mine clockwise like you did.
Peace of mind restored.

Thanks all.
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