PCI-E 3.0 backwards compatible with older graphics cards?

Question

Iron

I decided to gradually update my old PC, in connection with which the question surfaced. I have an old but reliable video card Gigabyte GeForce 8600GT. I want to update the hardware in parts:
1. Process + Mother + Memory
2. SSD
3. Video card
If I take a mother with PCI-E 3.0 at the first stage of the update, will my video card start on it? I rarely play games (and even then - in the old ones), so the performance issue for me is not worth it - the main thing is to make it work.

Answer 1

If I'm not mistaken about anything, then there should be backward compatibility, i.e. should earn.

Answer 2

Importantly, PCIe 3.0 remains backward compatible with previous PCIe versions.

http://www.ixbt.com/news/hard/index.shtml?14/03/51

Answer 3

pci-ex controller has long been sitting not in chipsets, but in processors.