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.

  • Moist_Influence1022BEnglish
    1·
    11 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.