GTX 970 compatible with ASUS P8P67 LE MoBo?

Turbohelt

Distinguished
Dec 2, 2014
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Hello!
I just ordered a MSI GeForce GTX 970 gaming 4G because my old GTX 560 Ti was starting to fall behind. But now my friend tells me something about PCI-E 2.0 and 3.0 and so on, which I have no idea about..
My motherboard is a ASUS P8P67 LE (ASUSTeKComputer INC. yes?). Will the graphic card be able to fit in this or how does all that PCI thing work? I've found multiple different answers.. Some says it's 3.0, others says it's not and now I'm confused and a bit worried, since it is a lot of money (Obviously I can return it and so, but would rather not :) )
Hope you can help!

Rest of the specs:
Intel core i5-2500k 3.30 GHz, 4-cores
Corsair vengeance 2x4 GB (1600 MHz (?))
Corsair CX600 W
Do tell if you need more information :)