Gigabyte B650 AORUS ELITE AX features a dedicated memory channel for enhanced performance.
Gigabyte B650 AORUS ELITE AX features a dedicated memory channel for enhanced performance.
I purchased a B650 and 7800X3d to upgrade at the beginning of the month. After setting up the Mobo, CPU, and four sticks of Teamgroup with 16GB RAM at 6000Mhz, the system runs smoothly. I downloaded drivers from Gigabyte and went ahead with a BIOS update since the board came with an outdated F3 version. Restarting into the BIOS and updating to F8 worked initially. The system restarted twice but kept hanging during DRAM Debug mode. After a short period, I powered down, cleared CMOS, and tried again—still no success. I attempted a Qflash of other BIOS versions but it didn’t help. Eventually, I tested the RAM slots and discovered that A1 and B1 were faulty. The system only worked with A2 and B2 active. It’s been over a week since I reached out to Gigabyte support. Is there something I overlooked? The system is still saving but one memory channel appears dead. SPECS: 7800X3D Gigabyte B650 AORUS ELITE AX Rev. 1.0 BIOS F8 Teamgroup 6000Mhz 64GB CL30-36-36-76 Gigabyte 4080 Master 16GB Corsair RM1000X Gold
If these are the two available slots, you're not using a dead memory channel. These are the best memory slots, each on its own channel. The problem lies in running four DIMMs together. It might function if you understand what you're doing, but it's prone to instability, requires long training times (several minutes), and is sensitive to many factors. For 64GB of RAM, consider swapping your kits for a 2x32GB unit, or if you don't need it, return one kit and use two 16GB units.
The specific memory kit model numbers you purchased are two 16GB kits. You can align them with their original packaging by matching A2/B2 with A1/B1 using the serial numbers to assist with RAM training. It seems they likely use dual-rank memory, which complicates booting with four DIMMs. This isn't unusual according to @RONOTHAN## and @Whatisthis. Also, booting through EXPO doesn’t guarantee proper performance—check RAM speeds in Windows or the UEFI after startup to confirm. The issue might be related to the new socket, CPU, or RAM being brand new without optimization.
16GB DIMMs using DDR5 will likely be single-rank designs. It's physically unfeasible to make them dual-rank because there are no 8Gb ICs available for DDR5, and 2x16 organized DIMMs haven't existed since DDR2. My idea is they simply had a fortunate first boot, and the EXPO didn't fully support it. It's also conceivable that the two kits purchased were different—one with A dies and the other with M dies—which could add complications.
I favor the straightforward approach: send back one or both kits and use just two DIMMs. Yes, it’s possible to get by occasionally if you’re willing to put in the work, but it’s not worth it when a 2 DIMM setup is available. If that’s not an option, you’re likely dealing with 128GB+ of RAM and will face serious issues. Simpler IMC voltage adjustments rarely help at higher speeds, so you’re usually forced to rely on termination settings, which are tough to fine-tune. Personally, consumer boards should only have two DIMM slots.
Haha, this was supposed to be the first answer in the guide, but I believe it could help people grasp how intricate things can become. Many overlook the complexity and, thanks to today’s marketing, assume XMP/DOCP/EXPO will automatically fix everything—if it doesn’t, they’ll blame the product. In your situation, it seems the main worry is whether their motherboard DIMM slots are faulty.