Hi absic,
"That said, if you can't see the BIOS screen then how can you change it?" - The definitive question!

Other details as requested ....
VC - Gigabyte GV-NX86T512H
CPU - i7 870
RAM - 8G Corsair CMX8GX3M4B1333C9 8GB (4x XMS3 2GB) PC-10600 (1333MHz) XMS KIT, DDR3 (Compatible with MB from Corsair)
PSU - Antec EA-500D
SSD - OCZ Vertex2 from Sata 1
Storeage - 3 Western Digital disks from Sata 2,3,4
This is a new build, not previously 'run up'. (with the exception of the VC and PSU, both have worked together previously in LGA775 build.)