The PC cannot share files when XMP is activated.
The PC cannot share files when XMP is activated.
The maximum manual frequency it can reach with XMP activated is unclear, but your dual-rank sticks may reduce the peak speed compared to 2x16GB. The 13900K’s typical performance isn’t well documented in this context.
Usually I'm not comfortable adjusting RAM manually and don't know the many settings in my BIOS, so I've skipped them entirely. I'm not sure what the final result will look like beyond the automatic setting. The product you mentioned is available on Amazon, and since you got it as a kit, you expected a certain speed with XMP enabled. You're wondering if this kit limits performance because it's too much RAM.
Not the case with the kit; it's about the CPU itself. Intel and AMD adjust their CPU's memory controllers based on the number of sticks and ranks per stick. More sticks and ranks mean lower frequency. Intel's official spec for 13th gen K CPUs is 5600 with 2 sticks and 4400 with 4 sticks. From what I've seen (watching overclocking videos), 13th and 14th gen K CPUs tend to struggle above 7200, though with 64GB RAM that might not be a big issue. If your CPU works well with XMP enabled and manual frequencies around 6000 or 6200, the controller might simply refuse, or you might need higher voltage.
I tried a few approaches and still face the same issue with both 6200 and 6000 models. I managed to locate some discussions online using specific RAM model names, but it looks like a permanent fix isn’t available.
The optimal range is around 6800 for good tops, 6400 for average, and about 6000 for bad tops, especially with auto settings. Typically, this points to a timing problem rather than a frequency issue—frequency usually triggers specific 3-4 POST codes, moving to 55 before restarting, not lingering indefinitely. This suggests the system isn't interpreting the XMP profile correctly. Try entering XMP manually without enabling it, setting frequency to 6000MT/s, adjusting timings to 32-39-39-102 for tCL-tRCD-tRP-tRAS (keep tRCDW auto or match tRCD), and set DRAM VDD and VDDQ to 1.4V. Also, confirm your RAM is installed in slots 2 and 4 relative to the CPU; incorrect placement may cause this issue.
It seems you're exploring different settings for timing. Based on your approach using mode 2, it looks like you've already found a viable solution. Whether to stick with it or try the alternative depends on performance results—testing both could help determine the best fit.
I'm trying to clarify the context you're referring to. Are you asking about XMP II versus XMP I? If not, could you describe the setting in your BIOS and take a photo of it? This would help me understand what functionality it provides. ASUS often uses unusual names for their BIOS options, so this might relate to optimized timing, memory training methods, or controller settings—some of which can affect performance positively or negatively. As long as the setting doesn’t harm stability, I’m okay with testing it. I’d run a few stability checks just in case, given the speed and Intel memory controller characteristics.
On the primary "Extreme Tweaker" section, you can select between XMP, XMP ii, or "Asus Tweaked." In Extreme Tweaker>DRAM Timings, there’s a top dropdown labeled "maximus tweak," offering options for Mode 1 and Mode 2. This is displayed on the right side of the image provided.
Maximus Tweak offers two distinct memory training settings, with different CPUs favoring one over the other. It appears your system leans more toward mode 2. I plan to conduct some memory stress tests to verify stability, as using these settings often pushes memory close to its limits. For frequency-dependent instability on 13th/14th generation chips, Y-Cruncher YT3 has proven reliable—start it by pressing 1, 8, 18, or 0 in sequence, or use the command prompt with "y-cruncher.exe stress VT3" and the -TL:7200 flag for a two-hour run. I’ll need to test for at least two hours to confirm frequency stability. For timing checks, TestMem5 with the 1usmus_v3 preset works well.