I have a Gigabyte P55-UD3R but i think its pretty much common to all brands.
Heres my wonder:
The specs states that its crossfirex compliant and that the pci-e slots would run at x16,x4 or dual x8.
When two pcie cards are slotted in, is the bus speed automaticly set for dual x8 or i can choose to run one at x16 and the other at x4?
If i can run it @x16,x4 what would be best cards to buy, i guess it would be a High-End + a low-End...?
What determines which bus speed it needs at least? Would a low end, ati radeon hd 5670 per exemple, run at full speed in a x4 pcie slot?
If i need to run it @dual x8, what would be best cards to buy? Would a higher end card get trottled by the bus?