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Running two PCI E 3.0X16 cards

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  • Graphics
Last response: in Graphics & Displays
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December 31, 2013 4:13:06 PM

Hi, 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 board can handle and subsequently go to waste? Understanding that it can’t utilize the PCI E3.0 protocol will it run 32 streams or will it just run 16. Looking to stay efficient since these seem to run hot.
Thanks!

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December 31, 2013 6:01:32 PM

In that specific case, no, the 7770 will not come close to exceeding the bandwidth of your PCIe bus. HOWEVER, you will get better and more consistent performance out of buying a single card for the same amount of money. Crossfire/SLi on low-end cards just creates a headache and, much of the time, you'll be forced to run using only one of those cards, anyway, since not all games will be properly programmed for multi-gpu rendering.

tl;dr: Get an R9 270(or x) instead.
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December 31, 2013 6:24:07 PM

Omegaclawe said:
In that specific case, no, the 7770 will not come close to exceeding the bandwidth of your PCIe bus. HOWEVER, you will get better and more consistent performance out of buying a single card for the same amount of money. Crossfire/SLi on low-end cards just creates a headache and, much of the time, you'll be forced to run using only one of those cards, anyway, since not all games will be properly programmed for multi-gpu rendering.

tl;dr: Get an R9 270(or x) instead.


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December 31, 2013 6:25:02 PM

Thanks Omegaclawe ! I'll check those out.
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