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PCIe 2.0 and Crossfire 7970's

post #1 of 7
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I just got myself the Sabertooth RC2.0 (Not the Gen 3 edition) and foolishly I didnt know about the gen 3, I was intending to crossfire this board with another 7970 will the pcie 2.0 instead of 3.0 cause a bottle neck for the cards?

I got the board in prep for Steamroller.

Also I was wondering, I have a dc2t 7970, Is it a bad idea to get a different 7970 for crossfire? Voltage locked, bad overclockers, and unique PCB makes this card horrible for the 600 dollar price tag. frown.gif

Or should I wait for the 9xxx series?
post #2 of 7
it's not a bad idea as regardless of which 7970 you get you'll have the same performance, only temperatures would be different mainly. and when it comes to PCI-E 3.0 it's more for people with 4 video cards than dual as CallsignVega (OCN Member) has mentioned in his PCI-E 2.0 vs 3.0 video smile.gif
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post #3 of 7
1. 7970 or mainly any card only gets bottle-necked when in PCIe 2.0 x4.
2. Not a bad idea for another brand 7970. Most importantly it has a 7970 GPU on it.
3. AMD aren't skipping the 8xxxx series.

PS. How is a 7970 600$? It's around what? $430 US ?
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post #4 of 7
You're fine. A 7970x2 setup doesn't completely saturate the PCIe 2.0 bus under any circumstances. A 7990x2 (or 7970x4) would, but that's another story. If you're going to run 7990x2, you should really be using a high-end Intel setup anyway.
     
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post #5 of 7
Quote:
Originally Posted by ProVisionOman View Post

1. 7970 or mainly any card only gets bottle-necked when in PCIe 2.0 x4.
2. Not a bad idea for another brand 7970. Most importantly it has a 7970 GPU on it.
3. AMD aren't skipping the 8xxxx series.

PS. How is a 7970 600$? It's around what? $430 US ?

Check his location... rolleyes.gif
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post #6 of 7
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post #7 of 7
Doesn't work like that, 7970 is ~$450 if you do it that way (£300 ish)
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