Is a PCI-E16 1.0 Mobo compatible with a PCI-E 2.0/3.0 video card?

My motherboard manual says i have a "PCI express" video card slot. but it doesn't say if 1.0 or 2.0 or 3.0. I'm assuming it's 1.0 because the motherboard is a bit old and the video card as well(Nvidia geforce 7300 se/7200 gs) If i'm right and it's a PCI-e 1.0 motherboard, what video card can be compatible with it? 1.0 or 2.0 or 3.0? I want to buy a new video card.

I would think so. I have an old Intel DP35 MOBO and put in a GTX 560 last year and all is good.
Art.

If it is 1.0, you can use 2.0 but will lose some speed. The 2.1 and 3.0 may work or may not...