First GPU in loop order running hotter.

trawetSluaP · #1 17-05-20, 09:18 AM

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?

RobM · #2 17-05-20, 09:24 AM

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.

Avet · #3 17-05-20, 09:25 AM

3-5 degrees on the water is margin of error. Different cards, different blocks... Don't get fussed about it.

trawetSluaP · #4 17-05-20, 09:30 AM

Quote:

Originally Posted by RobM

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

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!

Warchild · #5 17-05-20, 10:28 AM

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.