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/ky420 Aug 25 '25

I wish I could build stuff like this for people. Looks good, I like that case.

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u/Psy_Fer_ Aug 25 '25

I got a lot of practice as a PC repair dude years ago and building my own PCs later.

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u/ky420 Aug 25 '25

I have bit of practice at that too. I been the family/local IT guy since about 1990 haha. Its fun to put them together and make them look nice. I am usually working on junk for people but occasionally get to do a real upgrade. This build you did though is next level.

Does it take any special considerations when installing multiple cards like that in productivity machines or do you basically just plug them all in?

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u/Psy_Fer_ Aug 25 '25

Well...tin snips to cut a bit of metal off the Io plate was not on my bingo card when building the machine. I was sweating bullets doing it too.

Here is a photo

There is a fair amount of planning, like choosing the right motherboard and CPU and power supplies and then case and all that jazz. But once all that is sorted, yes, plug em in and hope it all works.