Can anybody explain to me why a PowerColor X1650 Pro AGP graphics card doesn't appear to work in a ECS 755-A2 SiS 755 motherboard 
Card doesn't power up at all, not the PSU, tested that. Fan doesn't spin, nothing. Works fine in a different machine.
Any help would be greatly appreciated.

Card doesn't power up at all, not the PSU, tested that. Fan doesn't spin, nothing. Works fine in a different machine.
Any help would be greatly appreciated.