I have some great news for those with AGP 8X motherboards.. Albatron is releasing a card for the AGP 8X slot, that would allow you to bridge a PCI-EX Card.
http://www.pcunleash.com/bbs/zboard.php?id=PerformanceBenchmark&no=1564
Space is an issue tho.
http://www.pcunleash.com/bbs/zboard.php?id=PerformanceBenchmark&no=1564
Space is an issue tho.