Ryzen 5900x bei niedriger Spannung optimieren
Ryzen 5900x bei niedriger Spannung optimieren
I attempted to run the Ryzen 5900X at lower voltages using PBO2 in BIOS and observed stability at the maximum negative setting of -30V. However, I remain uncertain about the correct configuration. There are occasional voltage spikes above 1.43V, which makes me question if it's still within safe limits. Regarding your CPU performance, you noted a significant jump from around 4.2GHz to 4.7GHz under load, with temperatures staying below 60°C even during intense gaming. Previously, my Intel 7700 would drop to just 2GHz at idle and consume about 10W. Now the new CPU draws more power, especially during idle, which is unusual. I’m curious why it still runs at such high frequencies and maintains low idle voltage compared to my old system. What are the typical safe voltage ranges for this processor?
It seems straightforward. The system is already optimized with a balanced state and the lowest CPU usage of 5% by default. The issue isn't there—I haven’t adjusted those settings myself.
To try undervolting a Ryzen 5000 is a detailed process that requires care. The Curve Optimizer tool in PBO2 works well, though it takes time. It’s worth the effort and can be enjoyable if you explore it further. https://www.reddit.com/r/Amd/comments/qi...optimizer/
I follow the same approach as in the video, though I'm still unsure about the safety of 1.43V for that CPU. It seems some sources suggest a maximum of 1.37V, while others mention around 1.5V as the safe limit. Overall, I have a better clock speed—like 4.8 GHz at 50% load—and it stays within 60°C, which is much better than hitting 70°C.
You're observing performance trends across all cores during an all-core workload. Cinebench provides a straightforward and fast assessment. A score around 1.43v is acceptable, with occasional spikes in individual cores. Avoid noticing static even under this condition. It might be wise to check your BIOS settings and clear the CMOS to rule out any misconfigured options you might have missed.
Occasional spikes at that level remain even with -30 offset. Which tools did you run to verify stability? This is the typical pattern you'd see when undervolting with PBO2. Since your CPU operates at a lower voltage, it can achieve higher clock speeds while staying within power constraints. To get stock performance and efficiency, adjust the PBO limits for current and wattage together with the offset. You should also anticipate cooler temperatures during lightly loaded tasks, as the CPU uses less power to reach the same speed now.
I use Blender and some games benchmark not sure if that good idea. Actually first time do CPU undervolt in my life never had any experience with CPU OC or undervolt. I just want better temps and not want damage my CPU. If I set -30 offset it shouldn't go now more voltage than default if I'm right ? But one I still not understand why that CPU goo too 4ghz at idle with Intel 7700k never had that problem.
Yes, this adjustment is lowering the voltage consumption of the CPU. The standard setting permits brief spikes up to 1.5V, which means you're achieving a 70mv drop in lightly loaded conditions. For improved temperatures during heavy use, you'll need to tweak PPT, TDC, and EDC values to stop the CPU from overclocking excessively. A benchmark such as Cinebench R23 can help gauge your performance. At the default configuration, the 5900X typically scores around 20,500 points. By adjusting these parameters, you can potentially achieve higher stock performance without sacrificing speed. If stability is an issue, consider lowering PPT to 125, TDC to 80, and EDC to 120 while keeping your -30 offset steady. This could cut full-load power usage by roughly 20W. If the changes hurt performance, increment each setting by five and retest. For reliable testing in lightly loaded scenarios, OCCT is a good choice—it helps detect instability that might affect PBO undervolting. The free version works for non-commercial use, but be mindful of its one-hour limit; you'll need to run the test multiple times per core, allowing about 15 minutes per core for thorough evaluation. After completing the initial run without errors, switch the physical core from #0 to #4 and restart to assess the next four cores. Once the hour is up, move to #8 and finish the cycle. For advanced configurations, refer to the full settings guide.
Ok one more question PBO limit need disabled like in this video? In Google found say better set motherboard or even manual not sure anymore who is right.