Help! New PC Build Won’t Post, Getting DRAM Error Code

I recently finished assembling a new computer, but I'm running into a problem where it won't post. The motherboard light indicates a DRAM error as soon as I power it on. I've included the specs of my build: I'm using an ASUS ROG Strix X870E motherboard and G.Skill RipJaws S5 RAM (64GB DDR5). I've tested the RAM in both A2 and B2 slots, and also tried each stick individually in the A2 slot, but I'm still getting the same error light. I don't have any other RAM to check if the motherboard is the issue. I've also removed an extra CPU cooler fan for easier troubleshooting. I appreciate any advice!