This involves a distinctive challenge with DDR5 memory.
This involves a distinctive challenge with DDR5 memory.
Hello everyone, I really need some assistance with a strange issue I encountered. Over the past two weeks I've been using 64GB of DDR5 RAM on my Aorus Z690 motherboard (16x4, 6000MHz). Everything functioned perfectly until one day I woke up and couldn't post. After checking, the problem seemed to be with the RAM itself. I tested each DIMM separately and in every slot, and they all worked fine. I even tried placing three in random slots and it functioned properly. The issue only appeared when all four were installed together, causing the system to boot and fail to post. I've cleared the CMOS before, but it didn't help. Could anyone suggest a solution? Here are the details: motherboard, 16x4 DDR5, 1200W PSU, RTX 3080, H170i, and several important PCIe SSDs. Thanks!
Check the BIOS settings regularly. Early Gigabyte updates were known for memory training problems, especially with 4 DIMMs affecting the layout. A BIOS upgrade could resolve this, but consider swapping those four sticks for two 32GB modules if you need more than 64GB, or stick with 32GB if not. Enabling XMP will significantly boost performance.
I changed the BIOS to F8e, a beta version that should improve compatibility with my specific DIMMs. I require 64GB for my work (graphic design and video editing), but I’m also considering 32GB options. It’s odd how it functioned well for weeks before suddenly failing one morning... A new BIOS update named F20a released recently, but it only adds support for the newest Intel CPUs. I’m unsure if this applies to the 12000 series or the upcoming models.
I think we're likely talking about the latest Intel processors, given that ASUS and ASRock have both updated their BIOS for the 13th generation. It makes sense that Gigabyte would follow suit. It's odd, but DDR5 is generally unusual. The same happened with X99 when it moved to DDR4—many issues arose that weren't fixed until later models like Z170 and X299 were introduced. It's not uncommon to encounter strange problems with early memory controllers, especially when running at higher speeds like 3000MHz or above. BIOS support for four DIMMs isn't widely available yet, which is why only ASUS has managed to implement it in their BIOS. Generally, unless you're using a high-end ASUS board, sticking with 32GB DIMMs is safer for smooth performance with 64GB configurations. Four DIMMs looks better, but it cuts the maximum speed you can achieve—most boards I've seen run at 5400MHz with just four DIMMs. If swapping to a 2x32GB 6000MHz setup is feasible, go for it.
I identified the problem after a full day of thorough testing. One DIMM failed completely, but it didn't affect the PC launch unless that specific DIMM was in dual-channel mode (not DDR5 dual channel). When the dead DIMM was installed and not in dual-channel, it appeared as a 0gb stick in the BIOS, still functioning and displaying correctly. In dual-channel it triggered a power cycle and displayed several DIMM-related errors on the debug screen. I'm reaching out to the store where I purchased it to request a return merchandise authorization. Phew, finally solved after many attempts.