I think it was a DIY machine, those RTX 3090 have gotten cheaper for sure. From my experience, going beyond 4 GPUs is a pricey affair. See [§]. All but one mode

I think it was a DIY machine, those RTX 3090 have gotten cheaper for sure. From my experience, going beyond 4 GPUs is a pricey affair. See [§]. All but one model of the RTX3090 require at least 3 slots. If 4 GPUs connected via PCIe 4.0x16 are enough you can choose among various sRTX4 boards for 3000 series AMD Threadripper CPUs. [§] https://www.reddit.com/r/deeplearning/comments/tw0olq/comment/i3cuyks/?utm_source=share&utm_medium=web2x&context=3 https://www.reddit.com/r/deeplearning/comments/tw0olq/commen... Another useful URL: https://www.pugetsystems.com/labs/articles/Quad-GeForce-RTX-3090-in-a-desktop---Does-it-work-1935/ https://www.pugetsystems.com/labs/articles/Quad-GeForce-RTX-...