It was possible on XP, if it's the same system on 7 then just activate by phone and key in the right numbers to inform the system you have changed the graphics card.
PMSL! Yep, pikey way of doing it. However say the motherboard, not the GPU.
Knows it.
umm don't say motherboard lol, it's stated in the terms and conditions or whatever that a change of motherboard requires you buy a new copy.