Ram requires less voltage than its rating?
Ram requires less voltage than its rating?
You're experiencing some instability with your 2x8GB DDR4 RAM at 3600MHz. The XMP settings aren't booting, and changing the FLCK and voltage hasn't resolved the issue. Lowering the voltage to 1.3V seems to help. Your recent work with overclocking and CPU/GPU tuning might be contributing, but it's worth checking if those changes impacted stability. You can refer to CPU-Z for more details.
There are several memory chips designed to decrease in performance as voltage rises. The most widely used is the Samsung 8Gb C die, which typically performs best around 1.3-1.4V and may underperform beyond that range. It's possible your device passed quality checks and now operates inversely below 1.3V. You can verify the chip type by checking software tools like Thaiphoon Burner or examining the memory label for the integrated circuit code. For devices manufactured within roughly the last six to seven years, you should find a serial number near the top barcode—often ending with codes such as "810B", "821C", or "830B". These four digits identify the chip model, the manufacturer (1=Samsung, 2=SK Hynix, 3=Micron), and the specific die revision (A, B, etc.).
I've verified CPU-Z and the manufacturer is Samsung on both units, confirming it's a C die. In HWinfo, the voltage readings seem logical, ranging from 1.320V to 1330V even though BIOS sets it at 1.3V. The next step for me would be testing different timings through trial and error, adjusting gradually until I find the optimal setting.
They likely check memory voltage at the VRM output instead of the actual memory, which can cause readings to be slightly higher. The correct voltage for the memory should be around 1.3V. I’d test starting with higher frequencies, aiming for 1900MHz FCLK or even 2000MHz if possible, while keeping timing precise. Samsung C diesels probably don’t tighten their parameters too much, so you shouldn’t expect a significant drop.