X670E Steel Legend - Memory Issue

I'm finishing up a build and having an issue getting the machine to POST if both memory sticks CORSAIR Vengeance are installed in A2/B2. CPU LED stays on and the DRAM LED flashes on the motherboard. I've waited MANY minutes hoping that it was memory initialization. Powers on, boots, and works fine if either of the sticks are in B2 slot. I also tried to boot with the memory in A1/B1 but that did not work either.

Motherboard: X670E Steel Legend (v1.11 BIOS)
CPU: AMD Ryzen 7 7700x
Memory: CORSAIR Vengeance (CMK32GX5M2B5600C36)
Video: ZOTAC GAMING GEFORCE RTX 3070 TI TRINITY OC
Storage: Samsung 980 Pro 2 TB M.2-2280 PCIe 4.0
CPU Cooler: ARCTIC Liquid Freezer II 280 A-RGB
Power Supply: Corsair RM850

Currently running in just a 16GB config. Since each stick works on its own, I'm skeptical of a memory hardware issue. Are there any known issues that would exhibit this behavior? Any recommendations on things to check to resolve?

x670hell wrote: Powers on, boots, and works fine if either of the sticks are in B2 slot.

Since you are able to boot using 1 stick only, then enter bios and manually change the timings, if you have experience with AM4+DDR4 then you know what I mean hence I won't write more because it's a hxll lot to write.

and if you read through this forums' history you will find many near similar cases, i.e. upgrade to Zen3 with new bios but can't boot with 2 sticks, etc etc etc get tips and tricks here and there, as well as other forums.....

I won't say because XMP is not EXPO hence not compatible, because there's been report of EXPO also not booting at all and needed new bios to solve, etc etc etc..... SO, don't worry about XMP, just go the traditional method of manually finding the secret-timing that your system need.

Good luck. Hope to hear good news from you later.