Have issues with Infinity Fabric?
Have issues with Infinity Fabric?
I upgraded my RAM to reach optimal performance for my 5900X. I bought a 64GB CL16 3600MHz module in the hope of achieving consistent speeds. When I checked ZenTimings (version 1.2.5), I saw MCLK at 1800, FCLK at 1600 and UCLK at 900. Based on what I learned, setting the DOCP/XMP profile to 3600MHz should have given me around 1800 MHz overall. I thought I was doing it right, but my previous 32GB CL16 3200MHz model was only hitting 1600 MHz. My BIOS is current at P2.20. Thanks for the guidance!
Occasionally you might need to adjust the FCLK manually in the BIOS to 1800MHz. Open the BIOS interface and update FCLK to 1800, ensuring UCLK is set to match MCLK. This setting is typically found near memory-related options within the BIOS, though some older revisions require using the AMD Overclocking menu for fine-tuning.
I apologize for the delayed reply; I wasn't anticipating such a prompt response. I accessed my BIOS and attempted to configure it twice, but each time it reset me back to 2133MHz. I plan to try a CMOS clear to check if that alters the settings. Are there particular terms I should focus on? I didn’t notice specific details about FCLK or UCLK, though I did find a secondary MHz option in BIOS with a lower range. I set everything else to "Auto" to maintain synchronization. I’ll continue investigating and will capture a screenshot of the BIOS settings if the CMOS doesn’t resolve it. Update: I experienced three distinct blue screens after adjustments, which is disappointing since the last crash showed 1800s. I shared the images in sequence, starting from the BIOS modification. Note: I’m aware of the reference on the right side now.
PC isn't starting properly. No BIOS detected despite everything. It powers on, lights and fans run, but the display stays black. Someone cleared the CMOS after BSs and then attempted a full power-down without success. Dr. Debug provided an A6 code, possibly indicating SATA problems. My Windows installations are using NVMe drives, yet I can't reach BIOS. Recently, I updated to boot after turning off my PSU and holding the power button for a minute following another CMOS reset.
The initial issue might stem from low memory controller voltages; try adjusting the SOC voltage to 1.15V and observe the results. Those subsequent error codes aren't memory-related—the first one suggests the operating system is severely affected, possibly failing. If I still had my Taichi (X570, BIOS layout same as yours), I'd test alongside you, though I just sold it about two weeks ago.
I observed something about the operating system recently. It seems related to my dual-boot setup using a new NVMe drive. I believed I managed to keep Win 10 on one drive and 11 on another with the same key without any problems. The version of Windows I've been running for about a year or two has been very reliable. This was my first BS, which feels unusual. Even when I experimented last week, everything worked fine. I doubt the OS is responsible for RAM OC settings or BIOS failures, but honestly, I haven't really explored these topics much before. It's disappointing about the timing of your sale. A friend with an X570 Taichi doesn’t handle this kind of stuff, though. Regarding SOC voltage, where should I check? While checking forums, I found a mention of a tRC value being shown as 85 instead of 58. I attempted to adjust it manually, but ended up having my PC fail completely. I’m probably giving up now, hoping I can get it working again. The 5900X is only a few months old with brand new RAM, so I’m confused and a bit upset. I can’t afford to lose my system, and it looks like I might end up losing it if I keep trying. Update: I discovered the SoC Voltage settings, tried one final adjustment but had no success. Maybe I’ll revisit this later, but right now I’m not feeling confident. If you have any advice, I’d really appreciate it. I think I’ll do some more research with your help and try again eventually.
The SOC display will appear on the main screen. Change the "SoC/Uncore OC Mode" to "Fixed" and you'll get the chance to manually adjust the voltage to your preference. Most Ryzen 3000/5000 processors have an optimal range around 1.1 to 1.2V, and my 5900X seems to perform best near 1.175V. tRC is a peculiar setting. You should aim for tRP first, then fine-tune tRAS and tRC together so that tRC equals tRP plus tRAS. This won't impact stability if tRC stays higher than the sum of tRAS and tRP, but it doesn't influence performance—only tRP and tRAS do. tRAS and tRP mainly affect stability, while tRC is the key factor. You might want to adjust the BIOS version slightly. There are several X570 Master models with different revisions, some of which have faulty memory and FCLK overclocking. It's possible the newest one is defective, as AMD’s memory overclocking includes AGESA, a set of algorithms used by all manufacturers. This comparison is being made between two X570 boards. I haven’t noticed 1800MHz FCLK working properly even in the most broken revisions, so it seems unlikely. As long as you avoid adding more than 2 volts to the SOC or memory modules, you should be fine. You may need to reset the CMOS frequently.
It’s comforting knowing this situation aligns more closely with the 2.10 update than the typical setup you see online. It’s strange how far behind Ryzen development feels compared to what creators claim. I thought a deeper integration into Ryzen would have simplified things for regular users. Regarding resetting the CMOS, the fastest way to return to the BIOS is usually clearing it and then restarting—consistent attempts usually land you in the BIOS without long waits. My process has been inconsistent, with about five minutes between restarts, sometimes landing on a blank screen before jumping straight into the operating system. This feels different from the usual BIOS recovery steps I’m used to.
When it comes to BIOS tweaks, I usually try to click once or twice to boot back in. Tonight it worked that way, but then I hit a loop with crashes and BSODs, especially after a failed BIOS attempt. That’s unusual for me. If I just set the D.O.C.P./XMP and power on, everything functions normally. The tRC behavior also surprised me—after clearing it, the tRC value fluctuated between 58, 85, and then settled at 51 before stabilizing again at 85. My BIOS now shows 85 for tRC, which doesn’t match the expected 19(tRP) + 39(tRAS).
Given your SoC runs at 1.175V and you’re suggesting 1.15V, I’m guessing that lowering it could help, but it might also push the frequency beyond the safe range or cause instability. I haven’t found a way to check my actual voltage manually beforehand. I tend to avoid adjusting voltages outside of auto OC settings.
If this helps or hurts, let me know—I’d appreciate your insights. Your detailed explanations mean a lot.
To reset the CMOS, you switch on the power supply unit and keep the button pressed for ten seconds, then press the power button. After that, rapidly type the delete key while watching the POST code to verify everything is functioning properly. The exact voltage setting varies by board; some default to 1V, others to 1.2V. A reading around 1.15V works well for most CPUs, but my model only benefits from a slight increase to 1.175V. Avoid exceeding 1.2V for regular use, as it can harm the system over time. For daily operation, stick to 1.3V or higher, but this may reduce performance slightly. I haven’t tried overclocking the 5900X extensively; testing with PBO and adjusting limits compared to a stable 4.55GHz all-core setting shows a drop of 1-2% in multi-threaded tasks and a gain of 5-10% in single-threaded scenarios, plus a 2-3% decrease in lighter multi-core workloads like Cinebench. It’s usually better to enable PBO and set the limits PPT 300, TDC 177, EDC 188—this configuration performed well on my board. OC your CPU won’t significantly improve memory support and might even reduce it slightly. Running at higher voltages doesn’t really help memory performance and could stress the system. If you’re using dual-rank memory, ensure your CPU can handle it; otherwise, quad-rank speeds are unlikely. The memory controller, not the fabric, is likely the bottleneck. If you try to raise the SOC voltage, it may not stabilize at 1:1:1. Instead, consider lowering the max frequency to around 3,433MHz or 3,466MHz and stress-test with heavy memory workloads like Linpack Xtreme to confirm stability.
Thanks for your feedback! I’ll experiment again this evening after work and share the outcomes. I chose a 4-stick setup over 2 mainly because of gaming videos highlighting its benefits for FPS. For storage, I aimed for 64GB to handle rendering and larger files efficiently. My 32GB kit was near its limit. While 2 sticks offer stability, I believed a different configuration could balance performance and steadiness. If I switch to higher clock speeds like 3533MHz or 3466MHz, should I enable auto settings? Otherwise, do I need to adjust the MFLK, FCLK, and UCLK multipliers? Appreciate your guidance!