PCI-E 2.0 work in a 1.0 board?

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I've read 50 forum threads on the issue and there's always someone who says you need 1.1 even when most say it's 100% backwards compatible.

Is it like USB where it just won't hit the top speed but will still work? The card I'm buying won't be the best around so I don't think it'll push the 1.0 allowance anyway.
 
PCIe 2.0 motherboard slots are backward compatible with PCIe v1.x. PCIe 2.0 cards have good backward compatibility, new PCIe 2.0 graphics cards are compatible with PCIe 1.1 motherboards, meaning that they will run on them using the available bandwidth of PCI Express 1.1. Overall, graphic cards or motherboards designed for v 2.0 will be able to work with the other being v 1.1 or v 1.0.

According to Wikipedia, it sounds like the answer is yes. My comprehension is good, but they aren't specific enough to know for certain.

In my opinion, they cast a slight amount of doubt, but it should work.

http://en.wikipedia.org/wiki/PCI_Express
 
They fit in the same slot and are compatible. Beyond that the main two things I know that are different between the versions are an increase in power and data transfer speed provided by the bus.

1) The power plug on the back of the card will pick up the slack for any power the card isn't getting from the slot.

2) Most configurations are not fast enough to slow down a PCI-E bus to need v2. (just SLI/Crossfire with newest cards)
 
You should be fine on the whole. Might be worth checking out to see if there is a firmware upgrade for your graphics card though and installing that before you commit however.
 
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