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PCIe 2.0 and PCIe

Last response: in Motherboards
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April 7, 2011 3:44:35 AM

What exactly is the difference? I know that the bandwidth is wider on PCIe 2.0 but are there any other key differences?

Also, if you plug in a PCIe 2.0 graphics card into a motherboard with only a PCIe slot, what will happen? Does the performance of the card suffer? Are it's graphics capabilities limited or something? Or are there no setbacks whatsoever?

Thanks and sorry for being a nub D:

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a b V Motherboard
a b U Graphics card
April 7, 2011 6:18:27 AM
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By PCI-E, I'm assuming you're referring to PCI-E 1.0/1.1?

A PCI-E 2.0 graphics card should work in a PCI-E 1.0/1.1 slot, with a few exceptions (although that should only be the case for certain motherboard and certain graphic card combinations, either that or that's with PCI-E 2.1 cards sorry, memory's a bit fuzzy right now) and should work without any problems. The performance of the card should not suffer, should the PCI-E 1.0/1.1 slot run at the very least x8 mode (equivalent to x4 PCI-E 2.0, which is suprisingly not much of a bottleneck for most of today's cards).
April 7, 2011 1:18:41 PM

Yeah I was referring to the 1.0 slots. I plan to run an HD 6850 PCIe 2.1 in the slot so will that be an issue?
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a b V Motherboard
a b U Graphics card
April 8, 2011 6:33:09 AM

I'm not sure. It should work, I'm thinking its the HD 5000 series with the compatibility issue, but I'm not 100% sure sorry.
April 8, 2011 9:31:08 AM

Mine will be a Gigabyte 6850, any thoughts there?
April 15, 2011 5:20:21 AM

Best answer selected by bazicdude.
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