Originally Posted by tsm106
1. The board would need a pcie switch, a PLX of some sort to split the lanes out of the x16 available into something odd ball like x12/x4. It's a giant hint that it doesn't have a splitter because the x4 is just x4. This makes me wonder why x4, and where does that x4 actually connect? How many lanes are available to the 970 chipset natively? I highly doubt its x16 + x4...
2. How would Giga know it only works in x8? Cards will work in any slot. It's really convenient that you don't have an x8 slot, he could have just told you the truth, sorry that x4 is off the southbridge or something.
1) It should connect to the sb using an expansion card, to then nb using a graphicscard. According to this wikipedia article the 970 chipset supports crossfire with x8+x8 pcie slots. The only slot where it said in the manual that it only works with expansion cards is the top pcie x1 slot. The rest should be capable of switching. I can use the graphicscard in the x4 slot but games will crash using it. Also, graphics are not fluid when used. The framerate in dirt 3 is 60fps+ but the game slows down and gets faster every 1-2secs. Same in most games.
2) Yeah I also don't know. As I asked he replied instantly and told me that that doesn't work. I also thought videocards were compatible with any. The weird thing about this board is that rev. 1.0 and 1.1 support xfire (which I have) while rev 3.0 doesn't support it, but I do not see any changes in pcie lanes.
Originally Posted by Marioshi
Oh, my bad, I thought the 7770 and 7750 would be the same but they are not. My 7750 does not have a crossfire bridge connector, and AMD says I dont need one
Looks like a new mobo or a new video card is in order.
You could probably sell the 7770s and buy a single card that performs as well or better, no?
Yeah I'm prob just going to buy a 7970 instead