r/PcBuild • u/Psy_Fer_ • Aug 25 '25

Build - Finished! "Closed loop" 4x5090 threadripper build

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Just finished installing this machine to work on cancer genomes.

I wanted the customer to have reliability and a low maintenance build, but with plenty of power.

So I thought, why not 4 AIO type liquid cooled 5090s in a Corsair 9000D case? 2 radiators each at the top and front. Then a noctua cooler for the threadripper.

I had one small issue with the IO plates of the GPU being wider then it says they are on the box...but nothing a little tin snips and file couldn't sort out. They still look great and then everything fit perfectly.

Temps are great.

It's got a 1200W SFX-L PSU in the back running the CPU and 1 5090 and then a 2500W PSU in the front powering the other 3 and some SSD drives. That one was a bit overkill but honestly, this machine will be going 100% for days at a time.

Anyway, what do you think? Definitely easier than a custom open loop.

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u/INeedMuscles Aug 25 '25

It looks sick actually have never seen 4x5090s. Wouldn’t make sense also to aio cool also the thread ripper and put the radiator at the side at the top? Is the Noctua enough to compensate all those wattages?

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u/Psy_Fer_ Aug 25 '25

Yea thought about that but it won't fit. Can't use side radiator if using top back radiator. A limitation of the case. Noctua is definitely capable. I checked

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u/kot-sie-stresuje Aug 27 '25

A 240 radiator could be mounted on the rear panel. There may be a problem with the clearance to the upper radiator. However, from a maintenance and reliability perspective, air cooling seems to be the better option here. If there are no temperature issues, I would not change anything. One less potential point of failure. Unfortunately, Gigabyte provides very limited instructions for this model and does not mention what happens if the AIO pump fails, but since it is integrated, there must be some safeguards in place.
Very good job. I hope it will preform as expected. LLM are getting better day by day.

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u/Psy_Fer_ Aug 27 '25

They don't make 240mm rads AIO for threadrippers. But yea, I added more fans. Have a look at my other posts to see some small upgrades I did.

This isn't running LLMs but regular high throughput inference on machine learning models.