Ryzen 5800x PBO help

[AugustineLofthouse]

I've recently received a build with 5800x that came with PBO already enabled with +200mhz core boost override enabled in bios (b550 elite v2). All seems stable and well for the most part, besides games crashing to desktop 3 or 4 hours into a session.

Can anyone explain to me why I hit higher performance and higher temperatures if I go back to stock (PBO disabled) vs the way it arrived to me? I'd have figured this was the opposite of what to expect. I remember reading somewhere if you set that core boost override too high you don't get any actual benefit and it has to be slowly incrementally increased from 0 until you stop seeing benefits. Is this the case? It's tough to find any explicit statement of how it works and ryzen feels like a bit of a dark art at this point.

 

[AugustineLofthouse]

I haven't, I've literally just bounced between the PBO +200mhz setting ocuk delivered to me and all stock pbo disabled. I haven't much desire to OC at all to be honest and was just wondering why both performance and peak temp increases with stock PBO disabled. Logically this seems the wrong way around.

 

[AugustineLofthouse]

It's probably being pushed to hard with the +200 boost and is clock stretching so while it looks like the core is running higher the actual effective clock isn't hitting those numbers.

When running benchmarks etc Ryzen Master shows the cores running lower than stock. It just seems as if the auto pbo settings with the +200 set completely hits actual speed with the only benefit being slightly lower temps.

As for why it's cooler when oc'd it could be that PPT has been adjusted so it forces it to use less power.

I thought along these lines myself but it came to me with PBO limits set to motherboard which I can see in Ryzen Master raises the limits considerably above stock, so again, logically going in the other direction.

 

[AugustineLofthouse]

Do you have the ryzen power mode (driver) for for windows installed and selected under power options

I don't, just running on the default w10 balanced plan. I did a bit of reading on this and it seemed like the ryzen specific plan was no longer needed as the oem windows one had been updated to provide the necessary functionality.