GTX 670 only PCI-E 2.0?

Snapzz3

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I have a Gigabyte GTX 670 and an Asus P8Z77-i Deluxe motherboard. In GPU-Z the GPU is detected as PCI-E 2.0. Shouldn't it be detected as PCI-E 3.0?
 

Snapzz3

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Oh shoot, that explains it. I have the 2nd gen 2600k, is the performance difference between 2.0 and 3.0 noticeable?
 

Snapzz3

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Well then PCI-E 3.0 seems absolutely useless, haha