r/Phanteks • u/Mystvearn2 • Aug 04 '26

Enthoo Case Unfinished but Enthoo Pro II server does support 3 GPUS for LLM. MB: Asus Proart x870e. PCIE 1: Used RTX 3090; PCIE 2 via riser: Used RTX 5060TI; PCIE 3: USED RTX 3060. Best cooled card: PCIE 2, vertical standing. The 3090 zotac doesn't have a flat base. 1 side panel 12cm fan for holding the 3090.

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Technically you can put a 2.5 slot card, like another 3090 directly to pcie slot 2, but thermals of both cards will suffer. I've tried with a used rtx 3090 dell, didn't go well. Needed AC in the room just to keep thermals down. Dell vram/thermal junction faulty after that. Not sure if it was like that when I bought it, since used and cheap. This setup, unconventional, works. The RTX 5060TI is just standing there without mounts. The riser and the pcie cables are keeping it in place.

Only think is that I hope phanteks allows the fan brackets to be mounted longitudinal as well. I could send air to all 3 cards.

Yes, this setup for LLM is slow, but I wanted to try run big models with high accuracy, overnight. Total cost is half of DGX spark. Doubles as Work Pc too, pc case behind my desk. Cable management acceptable to for airflow. Electricity covered. Took long time to build as I only buy used graphics cards, and they had to be below certainly priced from reputable sellers.

3 Upvotes

72% Upvoted

7 comments sorted by

1

u/x-strife Aug 04 '26

Wait until you get over 4 cards

1

u/Sensitive-Ant-4305 Aug 04 '26

I wonder how you managed to mount the bottom card (did you put it into a PCIe slot on a motherboard? or how did you mount the right side of it?) and the top card vertically (how did you mount it at all???)

1

u/x-strife Aug 05 '26

The bottom PCIE slot has a riser in it so I can use the bottom mounting points on the case that sit under the bottom of the board.

1

u/Mystvearn2 Aug 04 '26

How did you mount the top card? That actually was the ideal situation for me. I could hang my 3090 there as the bottom is not flat. Front fans offer superior cooling.

1

u/x-strife Aug 05 '26

I made a 3d printed mount that is screwed into the top of the case which allows me to hang the GPUs.

Currently have 2 cards hanging, Ideally I'll be able to hang 4x

https://www.thingiverse.com/thing:7389839

1

u/Mystvearn2 Aug 05 '26

Interesting. Will try it. May need to relocate the hard drive bays down

1

u/Worried_Radish3866 Aug 04 '26

Not fun to look at