Issues with CORSAIR Vengeance RGB PRO 64 GB 3200 Mhz RAM timings
Issues with CORSAIR Vengeance RGB PRO 64 GB 3200 Mhz RAM timings
Hello fellow linusians, I’m dealing with a puzzling issue that started in summer 2020 after upgrading my PC. I installed a Ryzen 9 3950X with a Gigabyte X570 Aorus Master (version 1.1) and paired it with a 64 GB 3200 Mhz Corsair Vengeance PRO RGB kit (16x4) using the specified timings. The problem is that the memory doesn’t fully utilize XMP profiles, and when I manually set it to 3200 Mhz with manual DRAM voltage adjustments around 1.35-1.37, it adopts strange timings like 22 22 22 53 75 (CL, tRCD, tRP, tRAS, tRC). This makes me wonder if there’s a way to force the modules to maintain the 3200 Mhz frequency without stability problems or boot loops. When applying XMP, the BIOS keeps cycling through codes around 60-61, which seem to trigger this behavior. Have any of you seen this before? What solutions have you tried?
Activated XMP and adjusted DRAM voltage to 1.45V. Tested stability under these settings. Confirmed only one method was used—either XMP or manual voltage, not both simultaneously.
Which BIOS version is installed on your motherboard? Have you applied any of the latest updates? Running four DIMMs may cause more stress than two due to increased demand on the CPU's memory controller. For testing, could you confirm if 32GB (two 16GB modules) was successfully supported with XMP/DOCP?
It functions perfectly with two DIMMs. Four 16-pin connectors don’t work either. I just upgraded the BIOS to F32, which is the latest stable release. There’s another one, probably a beta version. The motherboard model is likely version 1.1, as indicated on the packaging.
When using two DIMMs, the IMC is more likely to be the IMC rather than Gigabyte. AMD only lists IMC ratings for the Ryzen 3000 and 5000 series up to DDR4-3200. Anything beyond that usually needs IMC overclocking. As with any overclock, results may differ. Manufacturers like Gigabyte can assist via BIOS updates, enhancing RAM stability and compatibility—but limits exist. It’s worth exploring BIOS tweaks, XMP settings, and manual adjustments. For example, you could switch from DDR4-3600 to DDR4-3400 or DDR4-3200 while keeping XMP timings and voltage but changing the DRAM frequency ratio yourself. This approach can be challenging but potentially rewarding. I’ve seen success with a 32GB (8GB X4) DDR4-3000 CL14 G.Skill TridentZ running at DDR4-3600 CL15, as documented in the provided guide.
Increasing memory usage leads to reduced performance as expected. This is the normal behavior. The board functions adequately, providing a stable timing that performs well. Begin reducing primary timings—start with cas latency. Set it to 20 from the auto hit F10 and test if posting improves. Repeat wash rinse.