fit voltage?
fit voltage?
I’m still getting familiar with PBO, having recently upgraded to a 2600 and been doing manual overclocking for several years. These new settings are a bit confusing for me.
I have a 3700x with an Asrock B450 Pro4 and the 1.0.0.4 AGESA patch B (the latest). The BIOS on this board now has five limits instead of the usual three. Two of these extra limits are for the SoC, but I’m using XMP and using the DRAM calculator to set timings—it worked perfectly with the stock CPU settings. I’m unsure whether I should adjust the SoC limits in PBO or not. I also don’t know if I should modify the scalar and auto OC settings; I feel like auto OC doesn’t help much, and scalar relates to voltages, so I’d prefer to keep that at its default.
Regarding fit voltage, I followed what I read: just max out the PBO limits and leave everything else at stock. I ran small FFT tests in Prime95 and checked the SVI2 TFN sensor in HWinfo. Mostly it stayed around 1.275V, but it would briefly spike up to 1.281 and sometimes drop to 1.22. I’m not sure if I should stick with the common 1.275 or go for the lower 1.22. Does that mean I should enter 1.275 in the BIOS, or is it the target voltage considering vdroop?
I’m also aware that doing an all-core OC on a Zen2 chip can be unnecessary, and I’m just trying to understand more about this board and my processor. Any guidance would be greatly appreciated.
Because Ryzens are still emerging in terms of architecture, Intels haven't changed significantly since Sandy-Bridge, only becoming smaller. The updates aren't fully understood by everyone. Ryzen can manage up to 1.5v during idle or low current, 1.325v at higher usage, and near 1.2v under extreme conditions. This keeps the overall power consumption similar, though it's constrained by pbo. OC tends to push these boundaries, but since pbo isn't applied and definitions vary, even users with 1.325v OC are experiencing burnout at very high speeds. They're essentially demanding more current than they're accustomed to controlling.
Scalar you can keep on auto, I haven't noticed any advantages, it affects time a core spends at its highest frequency but that's recorded in milliseconds. When it goes past the peak, the load should move to another core.
Your voltages look great under full load, around 1.3v (and mine too).
When I perform small FFTs in prime95, I check the HWinfo sensors. But those sensors clash with HWMonitor. I've also noticed readings in HWinfo that are clearly incorrect, making it hard to trust the data. Plus, I'm unsure whether the maximum voltage I should enter into the BIOS is 1.275 or 1.22. When I manually adjusted the settings, I achieved stable all-core speeds of 4.3ghz at around 1.24-1.25v, with vdroop reducing it to 1.2-1.22 under load. I'm not sure if this falls within the safe limits indicated by the HWinfo sensors. Some people mention that certain CPUs can only safely run at up to 1.25v, which adds to the confusion from the conflicting information on forums.
Because Ryzens are still a relatively new architecture, Intels haven't changed much since Sandy-Bridge, just become smaller. The changes aren't fully understood by many. Ryzen can manage up to 1.5v during idle or low current, 1.325v at higher usage, and around 1.2v under heavy load. This keeps the overall power consumption similar, though it's constrained by pbo. OC tends to push these boundaries, ignoring pbo, and differing views on what counts as high current usage mean even users with 1.325v OC can face burnout at extreme speeds. They're used to setting low/max current limits, not regulating for higher demands. A web surfer or light gamer can run smoothly at 1.325v and 4.4GHz without issues, since CPU load isn't excessive. However, a video editor or heavy gamer would likely overheat under the same settings.
This leads to mixed information among users.
Ryzens operate differently from Intels. Intels define maximum limits as operational boundaries; you adjust your CPU speed accordingly, ensuring stability. If you push 4.4GHz, the CPU will adjust its voltage to maintain performance, balancing power needs with thermal capacity. Intel essentially says, "I'll go fast, but make sure your cooling keeps up."
Ryzens, on the other hand, adhere to their limits. You can try 4.4GHz, but only if the CPU supports it. They have built-in safeguards like pbo and aim to deliver performance without overstressing themselves. The ideal setting is a small increase—around 0.02v to 0.05v—keeping voltage within 1.2v.