Problem with XMP functionality reported.
Problem with XMP functionality reported.
I just assembled my new PC with these key details: Corsair Vengeance RGB Pro DDR5 2X16 CL3, SKU CMH32GXM2B5600C36 ROG STRIX B660-A. The link for the motherboard is provided, and I’m facing an issue where XMP settings don’t trigger. I’ve confirmed the motherboard isn’t supporting my RAM, but I’m wondering if there’s a way to custom overclock it so the memory reaches 5600 MHz. Also, I have no experience with RAM overclocking.
No, I don't have access to your system's BIOS version. You can check it by referring to your computer's documentation or using manufacturer tools.
Are your components current with the newest firmware? Each BIOS update significantly improves performance. If you're using an outdated version, it might resolve the problem. Additionally, are the memory modules positioned near the CPU in the second and fourth slots (the primary locations for optimal speed)?
Confirming your RAM placement: are slots 2 and 4 from the CPU perspective correct? Given DDR5 configurations and their fast speeds, those positions are crucial for achieving higher memory performance. Verify they're in the right slots and XMP isn't active. Adjust the voltage settings—use the label like "DRAM VDD"—set the frequency, and test booting. If successful, tweak timings and perform a stress test. If it still doesn’t work, increase the voltage up to 1.4V without cooling, then gradually lower the frequency until it boots.
Attempted every method, but the sole safe frequency for my PC is 4266 MHz
Sadly, the latest BIOS you have is the only one compatible with 13th generation Intel processors, and it doesn’t allow reverting to an older version.
I found a way to work around the issue. By setting XMP to 1.2 instead of 1.25V, the system ran smoothly without overheating. I'm now testing how much more performance I can achieve. (EDIT) Previously, I couldn't exceed 1.2 or even 1.205. The memory was stress-tested and everything functioned correctly!
In short, you seem to get more stability with higher RAM speed at lower voltage—like 1.2V instead of 1.25V. For DDR5, it’s not unusual to need a balance; raising the voltage can help, but there’s usually an optimal sweet spot. I thought most systems require a higher DRAM voltage, but some experts suggest certain configurations can handle lower voltages without major issues.
Your experience with the SkHynix 2x16GB kit is interesting. You mentioned struggling to hit stable speeds above 5800 MHz on your MSI Pro Z690-A with 12.7GHz CPU, even though you heard some people claim 6000–6200+ is possible. It sounds like your setup might be within a viable range, but others warn that pushing voltages too high can hurt performance or cause instability.
Benchmarks suggest improvements in write/read speeds and latency at lower voltages, but real-world gaming results don’t always match those numbers. XMP profiles often set the kit to 1.4V, yet stability drops above 5800 unless you disable certain features. Trying different timings helped, but sometimes it made things worse.
In short, lowering the DRAM voltage can boost stability, especially with custom timings. However, whether it actually improves gameplay is still unclear—your setup seems solid for stable performance.