Question what is best practice for keeping multiple GPU's cool?

[ldotchopz]

I Have a pretty good rig i use for 3D rendering

AMD 3970x 32 core threadripper with Ice Giant thermosyphon cooling (works great)
2080ti gpu
3080ti gpu
128gb Ram
Zeneth Extreme alpha ii motherboard
there is only about 1.3cm between the 2080ti and the 3080ti. using HW monitor i can see the 3080 gets up to about 90 degrees which is worrying.

How do people usually go about installing multiple graphics cards in one machine and maintain a good temperature?

I have a very deep case but it's not the tallest. which stops me from using the lowest PCIe stop on the motherboard because the PSU is in the way. would getting a taller case help? or is the gap between GPUs not a huge issue?

I see people stacking them very close but i have no idea how they keep them so cool.

Any advice would be appreciated.

Thanks!

 

[hotaru.hino]

A small gap between the video cards is a problem. I've seen an appreciable cooling difference in one of my setups by simply removing the sound card which was two slots down. It's also the reason why vertically mounting video cards usually isn't recommended unless you're doing liquid cooling (or at least I think that's a thing).

Is there a reason why you need two high-end video cards in this system?

 

[Lutfij]

Run an airconditioner in the room that the system is running in and make sure you're not in a humid environment.

How do people usually go about installing multiple graphics cards in one machine and maintain a good temperature?
Jokes aside, go custom cooling for the GPU's, make sure you over rad and have the highest possible static pressure fans on said radiators.

 

[Eximo]

You can power limit them so they are more efficient.

With threadripper though, getting a bigger case is a decent idea since all of your slots will have the bandwidth for the cards.

Water cooling is an option.

 

[ldotchopz]

A small gap between the video cards is a problem. I've seen an appreciable cooling difference in one of my setups by simply removing the sound card which was two slots down. It's also the reason why vertically mounting video cards usually isn't recommended unless you're doing liquid cooling (or at least I think that's a thing).

Is there a reason why you need two high-end video cards in this system?

I thought about the cap, thank you. i can't made any more room i may need a bigger case.

 

[ldotchopz]

You can power limit them so they are more efficient.

With threadripper though, getting a bigger case is a decent idea since all of your slots will have the bandwidth for the cards.

Water cooling is an option.

I have a great ice giant cooler for the threadripper, that is actually the componant that i'm not worried about as it stays so cool. but the graphics cards seem to overheat. is it possible to liquid cool GPUs?

 

[ldotchopz]

Run an airconditioner in the room that the system is running in and make sure you're not in a humid environment.

How do people usually go about installing multiple graphics cards in one machine and maintain a good temperature?
Jokes aside, go custom cooling for the GPU's, make sure you over rad and have the highest possible static pressure fans on said radiators.

my only issue here is that i would be very cold lol. do you have any examples of multi GPU rigs? i cannot see many that actually in use, just tests on youtube

 

[Eximo]

I used to have dual water cooled GPUs. Not that uncommon when SLI and crossfire were useful. Generally you also toss the CPU in the loop, but that is entirely optional.

Here is a fancy example. Mine was pretty rough as I crammed it into a not-so-friendly chassis. Then I went back to single GPU. Still watercooled today.

https://pcpartpicker.com/b/8ptp99

You can find lots of examples on google images and the like. Just enter water cooled SLI or Crossfire. You can see dual, triple, and quad setups.

There is also the somewhat cheap way. A Kraken G12 bracket and an Asetek based liquid CPU cooler of your choice:

View: https://www.youtube.com/watch?v=rw5sOCEDD14

 

[Eximo]

Custom water cooling is expensive. You would probably be looking at a base investment of about $600-800 to do a dual GPU system these days.

 

[Gam3r01]

Can you post a picture of your rig currently?
A larger case may facilitate better airflow between the cards, or you may just want to change the fan setup you have now (Specific case and fan setup would be helpful here too).
Water cooling is an option if you are heavily invested in this system, an alternative is water cooling only the card with the most restricted airflow (kraken setup described above). The card with open access to the case should be running cooler already, and moving one card to water cooling would vent the heat directly out of the case, meaning cooler ambient air in the case for the remaining card.

 

[hotaru.hino]

I think the elephant in the room wasn't addressed: there's a 2080 Ti and a 3080 Ti, you can't SLI those together. So what do you do that would make having both of this cards in a computer beneficial?

If the 2080 ti isn't doing anything meaningful, then I would say chuck the card out.

 

[ldotchopz]

I think the elephant in the room wasn't addressed: there's a 2080 Ti and a 3080 Ti, you can't SLI those together. So what do you do that would make having both of this cards in a computer beneficial?

If the 2080 ti isn't doing anything meaningful, then I would say chuck the card out.

I use them for 3D rendering, they scale linearly so it speeds things up by slmoat double. It's a very common thing in 3D to have multiple GPU to render faster. would be great to keep them in one system

 

[ldotchopz]

Can you post a picture of your rig currently?
A larger case may facilitate better airflow between the cards, or you may just want to change the fan setup you have now (Specific case and fan setup would be helpful here too).
Water cooling is an option if you are heavily invested in this system, an alternative is water cooling only the card with the most restricted airflow (kraken setup described above). The card with open access to the case should be running cooler already, and moving one card to water cooling would vent the heat directly out of the case, meaning cooler ambient air in the case for the remaining card.

Sure here is my setup
https://ibb.co/VQ13mJ0
not the sleekest PC but very powerful
Any advice on anything would be great

 

[ldotchopz]

I used to have dual water cooled GPUs. Not that uncommon when SLI and crossfire were useful. Generally you also toss the CPU in the loop, but that is entirely optional.

Here is a fancy example. Mine was pretty rough as I crammed it into a not-so-friendly chassis. Then I went back to single GPU. Still watercooled today.

https://pcpartpicker.com/b/8ptp99

You can find lots of examples on google images and the like. Just enter water cooled SLI or Crossfire. You can see dual, triple, and quad setups.

There is also the somewhat cheap way. A Kraken G12 bracket and an Asetek based liquid CPU cooler of your choice:

View: https://www.youtube.com/watch?v=rw5sOCEDD14

So what i'm getting from all the feedback is a bigger case would proabably be benificial and perhaps some waterooling. I currently have no watercooling in mine. which could be a problem.the Kraken is interesting i'll have to look into that

This is my rig btw

https://ibb.co/VQ13mJ0

 

[Eximo]

You could try a vertical mount with one of the GPUs, case is set up for it.

The 30 series card likely has a pass through cutout for the last fan, it would make some sense to put that one in the lower slot so that it blows through to the card in the top slot. But that is a big maybe.

Exact GPUs will be needed for custom water blocks. The Kraken G12 is pretty universal, but certainly verify that with their compatibility list. And you would need to front mount a radiator in either scenario if you want to keep the thermosiphon.

Everything changes with a new chassis. Plenty of options there.

 

[Gam3r01]

Your case has cutouts to mount a card vertically, have you considered adding a riser and moving one of the cards to the vertical slot? More of a tinkering idea than a solid fix though.
I also cant tell your exact fan mounting options, but maybe consider sliding both of your intake fans down. Right now the top fan isnt doing much of anything except blowing right into the exhaust fans, so lowering them would provide more across-case airflow.