Can a BIOS upgrade enhance undervolting results? (AMD Curve Optimizer)
Can a BIOS upgrade enhance undervolting results? (AMD Curve Optimizer)
I performed a BIOS upgrade recently to address an NVMe problem (the process ended up being quite frustrating). Today, I checked my Curve Optimizer data and noticed improvements—clearly, the full all-core -30 offset is now stable. My system runs at 100% with no issues on the Ryzen 9 5900X using the MSI B550 Gaming Edge WiFi motherboard. I upgraded from BIOS version 7C91v16 to 7C91v19. It’s not uncommon for BIOS updates to enhance undervolting results, especially since the VRMs are built into the board and can adjust voltage effectively. While I assumed CPU quality was key for Curve Optimizer, this update clearly helped. If you want more information about my experience or the troubles I faced, feel free to see below: Spoiler – here’s what the CO results were before. For today’s test, I adjusted the two worst cores to -20 and -15, both now stable. I also attempted OCCT with all cores at -30, but it reported no errors this time. Previously, at -30, Windows Defender caused crashes repeatedly. Cinebench ran smoothly in a loop, and SotTR benchmarks passed without issues. An OCCT stress test confirmed stability, though I plan to try Prime95 next. Any additional tips would be appreciated, as I want full confidence in my system’s health. Regarding the BIOS update, here’s a brief recap: I experienced occasional crashes where Windows would restart and the main NVMe drive disappeared from BIOS. After a few attempts, I resolved it by reseating the drive. When I tried updating again, the system crashed once more—this time I fixed it by using a flash drive and leveraging BIOS flashback. The process took over 15 minutes but restored functionality. Moving forward, I’ll always opt for BIOS flashback or a secondary chip to ensure reliability. Those tools are essential for me now.
BIOS updates involve complex processes. BIOS manages all the motherboard operations and communication with connected components. Changes to these systems can significantly impact performance and functionality.
I didn’t mean “simple” as in no effort required. I actually performed the update hoping to resolve an NVMe problem, so I know updates can affect stability. What I meant was straightforward—no need for a new board, CPU, or PSU. All I had to do was install the latest patch. Mostly I wasn’t expecting significant gains from undervolting, thinking it mainly depended on the CPU chip itself. As long as the motherboard and power supply met a basic quality standard, they weren’t major influences. This matches what’s commonly said: motherboards don’t really matter unless there’s a problem with the VRMs or power limits.
Is this belief that motherboard choice doesn’t affect performance completely incorrect? Do people like Linus spread wrong information saying it’s just about features? Or are even basic overclocking exceptions to that rule?
If a BIOS update—no board change—can consistently improve performance, why is the advice limited to updating only when issues arise? Shouldn’t hobbyists push for newer versions to boost speed?
It required engineers and software developers many hours to implement what seemed simple. A BIOS update isn't just a small task—it's a complex process. Performance varies between devices, so not all high-end systems will match the same results. Updating the BIOS isn't advised because the risk of major failure is greater than tweaking something like RAM timing.
Usually the motherboard doesn’t affect things, right? However, AMD continues updating the AGESA microcode, and when these changes are included in BIOS releases, it can have an impact. Those updates will work with any compatible motherboard BIOS, meaning your setup should benefit too.
Are you using the latest AGESA version? You're likely seeing around 1.425v. Your temperatures should be at least 5 degrees cooler, though the boost isn't as strong as before. That's what I observed.
I recognize the effort involved in updating BIOS systems. This discussion stems from years of development behind the scenes. The operating system I’m using is shaped by thousands of hours of work. My keyboard, the one I’m typing on, is the result of hundreds of hours of craftsmanship. The desk it rests on likely required extensive time to build. And the Internet, by now, holds millions of hours invested in reaching its present form. Every part of modern life today reflects countless hours of human effort. If I could fully appreciate all the work behind what I use and rely on daily, I wouldn’t have room for other tasks. I don’t downplay the importance of our technology—this is clear to me every day. Our existence now seems almost miraculous compared to what people experienced a hundred years ago. The fact that we rarely lose power every few minutes is truly remarkable, highlighting the dedication of many individuals. Many people worldwide still face unreliable access to electricity, clean water, and phone service. I’m not minimizing the time spent on BIOS updates; in fact, pointing this out shows respect for the skill involved. It’s a sign of high-quality work, making complex tasks simple for end users. Only then can I enjoy running the latest stable BIOS without needing special tools or wiring.
Also noted, this model restricts the vcore setting. That's not too significant since you can easily exceed 200W PPT, reaching around 240W.
It's accurate that Mobo can influence performance only when you push the CPU to its limits. Most users understand that CPU overclocking has largely faded since the 9th generation, making it largely ineffective unless paired with powerful cooling solutions like waterloop or chiller loops. The choice of motherboard mainly depends on features rather than overclocking, as it's not a common goal for everyone. For OC boards, models like B550 Unify X or AORUS Master stand out due to their strong RAM support, which can boost performance when paired with high-end RAM (3800-4000 CL14/13 1.5-1.75V or 4600+ CL18/17 1.6V+) and reasonable voltages. While a 10% performance gain may seem minor, it's not worth spending over $200 on such boards. Instead, consider more affordable options like AORUS Pro P, Tomahawk, Steel Legend/Extreme4/PG Velocita, etc.