Ryzen restarts when idle – issue resolved? (RMA)
Ryzen restarts when idle – issue resolved? (RMA)
The "C" at the end shows another timing setting; it should be 16-19-19-39 instead of what appears in the kit you shared. As long as BIOS settings are correct, this shouldn't cause problems. I discovered details about G. Skill memory model codes: Memory type F1 = DDR, F2 = DDR2, F3 = DDR3, F4 = DDR4, FA = For Mac frequency. Specific values include 8500 = 1066MHz, 10600/10666 = 1333MHz, 12800 = 1600MHz, 14900 = 1866MHz, 17000 = 2133MHz, 19200 = 2400MHz. The other four-digit numbers show the operating frequency without changes. CL timing is indicated by CL15 or C15, meaning CL15-x-x-x. Modules per kit: single unit (1), dual (2), quad (4), eight modules (8), triple (3), six modules (6), twelve modules (12). If the model lacks this letter, it means this number applies only to a specific module, not the whole set. For the complete model, check the label on the memory chip or packaging. Total storage options range from 2 to 128GB in various configurations. Series codes like TZ, TZRX, TZDC, etc., denote different types and colors. Timing details such as TRG/TRS, VR/VB/VK/VS/VG, and color variants (e.g., Classic Camo-Green, Digital Camo-Black) are listed. If a "D" follows the series name, it usually means a cooling fan is included, like in 8GTXD. You can determine module capacity by dividing total storage by modules per kit—e.g., 16GB/4 = 4GB per module. Additional details about colors and variants are available on the label or packaging.
Ryzen chips perform excellently with upgraded RAM bundles such as 16-16-16-36. These kits deliver strong results across all four revisions. I've personally tested a couple of these and also heard from friends and family about newer releases. Keep in mind, some discussions mention different problems depending on the exact memory you use. That's your call. I'm not urging you to swap the RAM, but I can suggest which options would likely have been better based on performance. The memory does seem to play a role in the issues you're experiencing.
Thanks, your insights are really valuable. Addressing the root cause is crucial, especially when dealing with intermittent problems. Considering all parts together has been extremely useful. I initially thought memory was likely involved, but once the CPU was swapped out and everything stayed stable, the issue disappeared. It seems the new CPU might be handling some memory-related quirks, which is common in complex systems with varying performance. Appreciate your understanding!
Ryzen systems depend heavily on memory performance. This often involves the IMC (memory controller) in the 5950x model. As noted by @ShrimpBrime, many users face problems with this setup. In my view, the core problem lies within XMP itself—a feature Intel provides—and the default timings are typically tuned for Intel CPUs. Manufacturers should adjust safe defaults when enabling XMP profiles. I believe most issues stem from incorrect BIOS settings. When I increased the voltage to 1.36, the problem vanished; reverting back to 1.35 and using the "Power Down mode" (available only on AMD Ryzen boards) resolved it. This feature disables the mode automatically when set to 1.35 or lower. No more unexpected crashes during idle, even under continuous load. This leads me to wonder why "Power Down mode" behaves differently when auto is active versus default. Is it enabled or disabled? No one has a clear answer since Asus doesn’t provide documentation for this specific board. It’s possible that raising the voltage beyond 1.35 turns it off, while anything at or below 1.35 keeps it on. The behavior remains unclear. Additionally, I’ve observed DRAM voltage fluctuations—dropping from 1.352 to 1.344 or 1.352 to 1.360 by tiny amounts (about 0.008). Others experiencing similar issues can share their experiences for better understanding.
All Zen 3 CPUs typically share the same IMC. After upgrading from a 5950x to a 5600x while keeping BIOS defaults, D.O.C.P. 3600 and PBO enabled, I haven’t experienced an idle reboot in nearly 24 hours despite close to 8 days of continuous operation (including a few nights of hibernation). In contrast, my 5950x model usually required around four reboots per day. One additional observation is that my shutdown and reboot events often coincided with WHEA errors in Event Viewer, pinpointing the CPU—especially the APIC linked to Core 14—as the failure point. I’ll keep an eye out for any reboots when the new 5950x arrives, as they should be clear now since I won’t have them. The reason low-power restarts seem tied to issues like CCX core instability, IMC problems, memory instability, etc., is making it hard to pinpoint a single cause and explains why settings that work for one person may not affect another.