Can I shove a PCI-E 4.0 graphics card in a B450 gaming pro carbon ac?

[skunkify]

I'm working on upgrading my computer and I usually play video games on it but I use it also used for school work. I've been having issues with my current graphics card recently (MSI GTX 1650 Super) and have decided to just upgrade it. I have been looking at getting a 6750 XT but its a 4.0 PCI-E and the B450 GPCA supports 3.0, I wanted to know if I would be able to use a PCIE 4.0 graphics card with the current motherboard until I get a new motherboard.

 

I also would like to know if the 6750xt is a good idea to get or if their are better options for price to performance. I am running a B450 gaming pro carbon ac, Ryzen 7 5800x, with a 1650 Super and corsair vengeance LPX ram.

 

[CommanderAlex]

2 minutes ago, skunkify said:

I have been looking at getting a 6750 XT but its a 4.0 PCI-E and the B450 GPCA supports 3.0, I wanted to know if I would be able to use a PCIE 4.0 graphics card with the current motherboard until I get a new motherboard.

Yes, PCIe is backwards compatible so the graphics card will run at the slowest speeds that the maximum is capable of. It will run at PCIe 3.0 speeds instead of 4.0. 

[Somerandomtechyboi]

29 minutes ago, skunkify said:

I also would like to know if the 6750xt is a good idea to get or if their are better options for price to performance

Used rx 6800(xt) or used 3080(ti)

Should be a decent amount of deals on fb marketplace, just need to make sure they work and you can check on location