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Is PCIe 3.0 backward compatible

Last response: in Graphics & Displays
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December 15, 2012 2:10:56 PM

Hello,
I have a motherboard with PCIe 2.0 graphics slots only. Will a PCIe 3.0 graphics card work if I plug it into one of the PCIe 2.0 slots?
a c 180 U Graphics card
a b V Motherboard
December 15, 2012 2:21:20 PM

yes its backward compatible.card will 100%work in 2.0 mbo
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a b U Graphics card
a b V Motherboard
December 15, 2012 2:49:45 PM

Yes it will work 100%
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December 23, 2012 6:29:28 PM

Will the performance be downgraded?
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a b U Graphics card
a b V Motherboard
December 25, 2012 12:49:59 PM

Depends on which graphic card.
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a b U Graphics card
December 25, 2012 12:51:16 PM

The performance may drop by a little. Not much.
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a b U Graphics card
December 25, 2012 12:59:03 PM

3.0 cards in 2.0+ slot will work at 2.0+. 2.0 cards in older 1.0+ would work at 1.0+ . Simply, all of them are backward compatible. You could run it on PCI-e 1.0 x8; it would be bottlenecked but it would work. But at your case, I guess any single 3.0 graphics card could work normally on a Mobo with with PCIe 2.0 smoothly.
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