There also weren't H100s available to scavenge. GH200 puts the Grace CPU and H100 GPU on a big module with a custom form factor and connectors, so the only viable route for using those GPUs was to keep all the electronics together and build a suitable case and cooling system around them. There wasn't any way to adapt any of this for use in an ordinary EATX case or with a different CPU, because the GPUs weren't PCIe add-in cards.