u/De-Nor

I'm building a new PC. My components are ryzen 7 9800x3d CPU, aorus elite ae1000pm pg5 PSU, x870e aorus elite wifi7 motherboard, aorus c400g case, 7 noctua nf-a12x25 pwm chromax.black fans, noctua nh-u12a chromax.black cooler, 32gb ddr5 6000mts cl30 Kingston fury ram, 2tb gen5 m.2 nvme Kingston renegade ssd. (No dedicated GPU at the moment, but it's not what I need help with). I've put it together, and motherboard gave me C9 error code. It boots and posts on one stick of ram, but with two of them or just the second one — it's stuck on the same C9 error. I've looked it up and couldn't find this code in the manual. Is it just bad ram stick or can I do something about it?