Quote from: bathrobehero on June 03, 2017, 09:13:31 AM

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In a typical gaming computer with one card there's plenty of space to pull air from.

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I have a couple of these cards in an open rig with about 6-8cm in beween them and they're the coolest.

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Thank you very much for your insight. I really appreciate that

After reading the above I tried to see if giving more space will run them cool, but unfortunately in my case they didn't cool down much Sad

Here is what I did.

GPU1 <--15cm Gap-->GPU2 <--15CM Gap--> GPU3 <--15CM Gap--> GPU4

And set the fan speed to 70% and and the room temperature is about 30C and the GPU temperature are as follows

GPU1 72
GPU2 74
GPU3 73
GPU4 74

But when I place a external fan in-between the gpus like below the they cool down a lot.

GPU1 <--15cm Gap-->60CFM Fan<--3CMGap-->GPU2 <--15cm Gap-->60CFM Fan<--3CMGap-->GPU3 <--15cm Gap-->60CFM Fan<--3CMGap-->GPU4

GPU1 63 Fan Speed 60%
GPU2 65 Fan Speed 60%
GPU3 63 Fan Speed 60%
GPU4 63 Fan Speed 60%

This external fan runs on 12v and has an rpm of 1300 moving about 60CFM, and I wanted to test a theory that, the GPU fans are very good in moving the heat away from the GPU chip but don't have enough force to push the heat away from the gpu unit itself.

So I changed the power to the external fans from 12v to 5v and the RPM fell a lot(I don't have exact count to be honest) and I am sure they are not pushing 60CFM now. And now the same setup as above produced different results

GPU1 67 Fan Speed 60%
GPU2 69 Fan Speed 60%
GPU3 68 Fan Speed 60%
GPU4 67 Fan Speed 60%

So I am of the option that the GPU fan are good in moving the heat away from the chip but they don't have enough muscle to push the heat away from the unit itself. So an external force pushing air in its direction helps a lot.

If my conclusion is wrong then I am sorry about it, I don't have a thermographic camera at hand, so its all just hot air stuff Wink

The external fan used is 120mm DeepCool XFan 120L/B Case fan.

Regarding enclosing these beasts I afraid customs cases is the way forward Sad

I have ordered Silverstone Tek 140mm FHP-141 case fan and once that reaches I will try out a custom case setup of this beast and will post back results.

In the mean time if anyone have any ideas please share it here.

Regards,
BLife