LocalLLaMA

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Community to discuss about Llama, the family of large language models created by Meta AI.

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PC Build Suggestion For RTX 4090 + RTX 3090 (alien.top)

submitted 10 months ago by Chromastone_1@alien.top to c/localllama@poweruser.forum

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I want to build a PC for inference and training of Local LLMs and Gaming. I've decided to go with an RTX 4090 and a used RTX 3090 for 48GB VRAM for loading larger models as well as a decent enough speed.

What motherboard, PSU and Cabinet should I choose? Ideally I'd want to run both cards at least with x8 PCIe slots and will also add 128GB DDR5 RAM in this build.

Also, should I go with Intel i9-13900K CPU or with a Ryzen variant?

Thanks.

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[–] Moist_Influence1022@alien.top 1 points 10 months ago

Because you said you want use it for gaming stick with consumer boards

Dual gpu = z790 boards Memory = max 98gb/2x 48gb Sticks.

i hear alot about instability issues when 4 ddr5 sticks are used. So 128gb ddr5 is not an great option right now.

PSU 1600w maybe 1200 if you dont get a i9 13900k

but 1600w do be safe.

Thats basically my setup but with two used 3090.

everything else is a gamble because we dont know what will change in the future.