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PCI Express 2.0 x16 vs PCI Express 2.1 x16

Last response: in Graphics & Displays
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June 30, 2011 9:29:53 PM

What are the differences? Most of the newer video cards require a PCI Express 2.1 x16 slot but all of the motherboards on Newegg are only showing them coming with PCI Express 2.0 x16.. I thought before they had both of them, but now they don't. Am I missing out on something or why does Newegg not have any motherboards with PCI Express 2.1 x16 slots?

I wanted to buy a Radeon HD 6000 series but most of them require a PCI Express 2.1 x16 slot, but none of the motherboards have them on Newegg.
a b U Graphics card
June 30, 2011 9:38:10 PM

2.0 works fully with 2.1 cards and this will continue for 3.0 in the future.
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a c 365 U Graphics card
a b V Motherboard
June 30, 2011 9:45:01 PM

Yeah, it'll work fine.

I have to admit I do not know the technical differences between PCI-e 2.0 and PCI-e 2.1. The bandwidth is the same though. All nVidia cards (to the best of my knowledge) still use the PCI-e 2.0 interface.
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June 30, 2011 10:52:17 PM

That's what I was thinking, but I still don't understand why Newegg removed that PCI Express 2.1 x16 option when looking at motherboards... it completely threw me off guard.

Thanks for the help!
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a b U Graphics card
a b V Motherboard
June 30, 2011 11:41:22 PM

from what i know the main difference is that pci-e 2.1 is able to pull more power from the slot itself. and yes pci-e 2.1 video cards will work on pci-e 2.0 slots.
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a b U Graphics card
a b V Motherboard
July 1, 2011 12:02:24 AM

"PCI Express 2.1 supports a large proportion of the management, support, and troubleshooting systems planned to be fully implemented in PCI Express 3.0. However, the speed is the same as PCI Express 2.0. Most motherboards sold currently come with PCI Express 2.1 connectors."

Or so wikipedia says.
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