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Radeon 7000 on PCI 2 mobo ?

Last response: in Graphics & Displays
March 11, 2012 6:49:03 AM

2 questions :
a) will HD79xx series Radeons (PCI 3.0 cards) work in older motherboards which are only PCI 2.x ?
b) assuming that it works but is limited to 5 GT/s (instead of 8 GT/s), would there be any appreciable performance difference in games @ 1920x1200 between a 7970 and a 6970 ? Or would Nvidia 580 be a better option (particularly if prices reduce in a few weeks) ?

More about : radeon 7000 pci mobo

a b U Graphics card
March 11, 2012 7:05:46 AM

a) Yes, it's compatible.
b) if it's running at 16x speed, you will be fine. And unless I'm misreading your question, of course there will be a difference between a 7970 and a 6970 at any resolution, because the 7970 is a much faster card. I'd say wait for Kepler, though, just to see how it stacks up against the 7970. Judging from nvidia's claim of running samaritan on a single kepler gpu, it should be pretty sick.
March 11, 2012 7:42:12 AM

Thanks for the info. Question (b) was more "how much of the 7970s performance advantage over 6970 is simply due to it running in a bus with faster interconnects, as opposed to it being a more efficient architecture ?"