Mobo identifies just a portion of the RAM capacity.
Mobo identifies just a portion of the RAM capacity.
Last week I completed my new setup using a 7900x, 7900xtx Pulse, an x670 Aorus Elite AX, and two 2x32GB Geil 6400MT/s CL32 modules. Initially, everything functioned smoothly with all 128GB of RAM accessible. I attempted to boost performance further using Buildzoid settings, but the system remained at 4800MT/s CL30. Eventually, I discovered the RAM was limited to 64GB. Over time, troubleshooting revealed several issues: I was only getting reliable performance with the last two RAM slots (B_1 and B_2) or rarely the first two (A_1 and A_2). Changing channels (A_2 and B_2) only recognized the final stick, and the machine failed to boot. I also cleaned the socket pins with isopropyl alcohol using a soft brush, but results stayed the same. Occasionally, the BIOS update (F11a) helped, and before powering on, I installed a Thermalright CPU frame. When I removed it to check temperatures, the CPU stuck in place and fell onto the pins—seeming normal for AM5. However, judging the pin layout, it appeared unrelated to RAM or voltage input, with two pins bent. After repairs, the system booted and recognized all RAM, though performance dropped after adjusting timings. Interestingly, I managed to run 2x32GB at 6400MT/s CL32 during testing—see the link for details.
You likely harmed the motherboard, possibly destroying the memory channel on the CPU. The DDR5 voltage can handle up to 1.45V, but pushing it higher to 1.5 or 1.6 is risky and could cause serious damage.