Intel Arc B70 with HP z640 workstation (pcie 3)

First-time local LLM user here! I’m running an old HP Z640 workstation with a dual Xeon E5-V4 setup (around 100GB of RAM). It used to have a Titan X Pascal GPU, but I swapped it out for an Arc B70. I’m not sure if the motherboard s PCI rebar, but I believe it s above 4G decoding. After quite a bit of fiddling with BIOS settings, I finally managed to get the machine to boot with the B70 installed. The key to getting it to work was making sure the card was plugged into a monitor until the GRUB screen appeared.