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Still a little confused about PCIE options

Tags:
  • New Build
  • PCI Express
  • Crossfire
  • Graphics
Last response: in Graphics & Displays
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December 31, 2013 2:27:58 AM

Need help on a new build :0

More about : confused pcie options

December 31, 2013 2:31:07 AM

and what are you confused about? you know that telling us this would help us to help you don't you...
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December 31, 2013 2:35:59 AM

Generally people need help with problems, and the way people help with problems is solutions. Solutions are generated by people who have information about said problems and knowledge of the subject. We here at Tom's are pretty good at knowing our stuff, so the lack of solutions must mean some part of the equation is missing, and it definitely isnt our knowledge.

Spoiler
Tell us what your problem is and maybe we can actually help you solve it
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December 31, 2013 3:10:57 PM

Sorry for some reason my actual question did not post. If you have an AMD FX board that accepts two PCI E 2.0 X 16 cards like this one ASUS M5A97 R2.0 AM3+ AMD 970 http://www.newegg.com/Product/Product.aspx?Item=N82E168... will it utilize most of the power from running two PCI E 3.0 X 16 cards like this SAPPHIRE 100358L Radeon HD 7770 GHz Edition 1GB 128-bit GDDR5 PCI Express 3.0 x16 CrossFireX http://www.newegg.com/Product/Product.aspx?Item=N82E168... or is this a lot more than the hardware can handle and subsequently go to waste?
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Best solution

December 31, 2013 4:57:07 PM

That motherboard has two physical 16x slots, though electrically the 2nd one is only 4x.
As long as a slot is 8x or better (PCIe2 or 3 doesn't matter), it wont bottleneck a card slotted into it, running a card in the 2nd slot will drag down the performance of the array. My suggestion is you jut buy an outright stronger card instead of crossfiring two weaker cards.
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December 31, 2013 6:16:55 PM

Thanks! That is what I was afraid of, they make it sound like they both run at 16x. Is that the case with all AMD mother boards i.e. the second slot always runs at 4x or 8x?
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December 31, 2013 6:59:38 PM

Not all AMD boards just some chipsets, 990FX boards should have all 16x slots.
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