Hi All. Sorry for starting a new thread, I've searched everywhere! I have a technical question and have searched high and low for an answer but can't find one hence my email. I'm looking to build a new system (upgrading from opteron 165 on asus 3200 xfire board) and have a 5000+ BE and hd3850 gpu. I'm not fussed about multiple gpu's so initially thought i'd go for the 770 north bridge. BUT i'm now thinking 780g north bridge in the hope that it will off load some of the jobs from the gpu namely physx processing. Is this true? I know hd3850 will not work with hybrid crossfire (which is a real shame since the card is nearly new!) So will the 780g do anything when I've plugged my hd3850 in?? Will it in XP or is that reserved for the great Vista!! Next quick question.. I was going to settle for the sb600 but upon reading reviews it seems sata and USB performance is slow. So now I'm thinking sb700, which is already paired with most 780g and now paired with 770 on a few boards. So is the sb700 much better than sb600 when implemented with 770nb or the 780g? Or should I wait (and for how long?) for the sb710/750? Some manufacturers have already got pictures of these boards but I have no idea when they'll be out? Please reply asap as I really want to get 3.4ghz from my new processor!! PS I will prob do it just using multiplier... I'm sick to death of cmos resets after high fsb non-reboots!!!