Your recommended build

A "cluster" means multiple computers wired together and coordinated so they behave like a single, bigger machine. This build combines 2x 8x H100 SXM server units to reach 1,280 GB of memory.

Real deal vs. just plugging in cards: the 8 GPUs inside each server are already wired together with NVLinkiNVIDIA's high-speed direct connection between GPUs in the same server — much faster than a normal PCIe slot connection, so the GPUs can share memory and work almost as if they were one big GPU. for near-instant memory sharing. Linking multiple whole servers into a cluster also needs InfiniBandiA high-speed networking technology used to connect separate servers together in a datacenter cluster — the equivalent of NVLink, but between whole machines instead of GPUs on one board. networking between them — dedicated high-speed cabling and switches. That's a different world from plugging several desktop cards into one PC over ordinary PCIe: technically possible, but far slower for a single large model, and not something a datacenter would actually do at this scale. This price also doesn't include the extra networking gear a real cluster needs on top of the machines themselves.