The VBIOS is different. It should work in other non-OEM systems.
Just to clarify, the HP Radeon Pro WX 7100 8GB graphics card should work fine in a home built computer as long as components are compatible.
Would the VBIOS need to be changed or updated?
If your GPU is detected properly by the system and you don't notice any glitches, keep working with it. No need to update the VBIOS