AM5 fails to power on or doesn't detect more than two RAM modules.
AM5 fails to power on or doesn't detect more than two RAM modules.
I designed a new setup meant for 4x32GB CL32 modules at 6400MT/s, but I understood it wouldn't reach that speed. It performed adequately at 4800MT/s with CL30. The challenge arose when trying to boost performance further—I couldn't adjust the frequency and resorted to using Buildzoid's presets. After carefully setting voltages (1.25v for CPU, 1.4/1.35v for memory) matching the specs in the video, the motherboard initially accepted up to two sticks at once. However, after several attempts rearranging them in different slots, I only got three working stacks, though it took multiple tries. I'm uncertain when this issue began, as it wasn't apparent until stress testing with Memtest86+. I also experimented with another XPG Lancer, which failed completely—only the first two sticks (A_1 and A_2) or sometimes the last pair (B_1 and B_2) worked, even when all slots were filled. Despite everything looking fine, I'm unsure what caused it. Could it be the CPU or the motherboard? Which one tends to fail more? The only solution would be swapping components, but that would require purchasing new parts and returning the old one. I also cleaned the connectors gently with a soft brush and isopropyl alcohol, loosened the air cooler and socket, and reinserted everything multiple times. Every time it took about 1 hour and 40 minutes just to boot up, which is unreasonable. This was the original stock configuration (4x32GB). Interestingly, during one test with two sticks on A_2 and B_2, I achieved stable performance at 6400MT/s for 32-39-39, but later attempts to run all four failed completely. Now I can't even use two separate memory channels anymore. My rig includes: 7900X Thermalright PS120 SE Gigabyte x670, Aorus Elite AX 2x32GB DDR5 C32 at 6400MT/s, Geil 2x32GB DDR5 C32 at 6400MT/s, and XPG Core Reactor 850W 7900XTX.
This happened because AMD introduced EXPO, making it smart to purchase a full RAM package. It seems 4x32GB units aren't widely available yet—only 2x32GB kits have been released recently in your area. You're probably using the newest BIOS version.
I acted that way since posting wasn't possible often, so resetting was the best option.
Recent correction (something I missed earlier) shows one RAM module isn't functioning, along with any others in the same lane—such as A1-A2 or B1-B2.