8000mhz RAM and Ryzen CPU

Hello, I could use some help from more experienced pc builders out there. I few months ago snatched 48GB DDR5 8000mhz, not cause I wanted fast RAM, but cause it was only thing I found at "normal" price, but now Im facing issues with finding compable motherboard and CPU as I dont want to brake bank, currently eyeing to buy AMD RYZEN 7 9800X3D 8-Core and GIGABYTE X870 AORUS Elite WIFI7, but as Im doing some research it seems I can't run my ram at 8000mhz and I have to run it manually at 6000 or 6400mhz - if my research is correct. Buying all these components took me few months so I was wondering if I should go for my current choices of CPU and motherboard (not bought yet) or save up more to utilise full speed of my ram or does it even matter at end. If I do run it at 8000mhz will my system be unstable?, is perhaps intel better choice? Thx for any advice