PC Processors

[Osireion]

Hey there, I have a Asus X-470 F gaming motherboard, just upgraded to Ryzen 5950x, 32 gb of 3200 MHz ram. I can't get PBO and Curve optimizer to work when testing in cinebench r23. It will randomly throttle down to 500 mhz after a few mins for a few seconds and then back up, and then my score drops from 29k to around 24k, hwinfo64 shows that thermal throttling HTC and PROCHOT EXT are being triggered but all my temps on motherboard and cpu are completely fine. I can post my bios settings and screen caps if needed, not too sure what to do. In games it's fine, I'm pretty sure it's doing what it's supposed to be doing, it'll boost to around 4800 / 4900, but I just can't get it to run stable in cinebench at all. 

[johnnyenglish]

What CO values are you using?

Some prefer to start high and test it all the way down till stability occurs. But maybe you can start low like -5 all core and do baby steps up.

Beware, the X470 F is not as good as most people imagine it to be, in fact, I went with the B450 E instead of the X470 F back then because the B450 E has more VRM capability than the X470 F.

You could be somewhat power limited and the 5950X when pushed can be overwhelming.

[Osireion]

Heya thanks for the response, I set PPT/TDC/EDC limits to motherboard, voltage and core ratio are set to auto, max boost overclock I started with 125 MHz and then I actually did start with -5 undervolt, and it'll run for about 3 to 4 minutes and then the prochot_ext thermal starts happening, but hwinfo64 shows that all temps on motherboard are fine, they're like 65-70 max under full load. I know the x-470 isn't exactly a OC board but I feel like it should be able to handle a normal boost fine without throttling. Not too sure what's going on

[johnnyenglish]

Thats actually not that much. Have a look on the VRM temperatures.

You can try the following too.

Reduce PPT/TDC/EDC values just a bit and put more CO like -15 or offset undervolting.

Good luck 

[FunkZ]

What does Ryzen Master indicate for temperature and PBO limits under load?

What CPU cooler are you using?

[Osireion]

Sorry could you pinpoint me as to what you mean on ryzen master for temperature and PBO limits? Do you mean what my cpu temp is and the boost it's showing? My cooler is Be Quiet Silent Loop 3 360 mm aio

[FunkZ]

How do Ryzen Master readings compare to HWiNFO? ie. are the PBO settings you think are applied actually applied and is HWiNFO accurate?

(screengrab courtesy of Reddit)

[Osireion]

So I'm attaching two images below, first one is hw monitor, hwinfo 64 and ryzen master right as the 500 mhz throttle occurs, and the 2nd pic is what it looks like when it's running normally, it'll run for about 2 to 3 minutes and then htc and prochot_ext turn red but the vrm temps seem fine? 

[mengelag]

Just to clarify @Osireion did you do the setting changes manually in BIOS, or are you using Ryzen Master? I know I've had issues in the past with Ryzen Master, whereas if I change it manually in BIOS I have no problems. You have the right guys helping you here though. They are much more knowledgeable than me. 

[Osireion]

I've never really used ryzen master to apply changes, just to monitor so all settings have been changed in bios, I'll attach some images of my current settings, I've tried experimenting with scalar at 2x and negative undervolt options of -5, -10, -15, -20 and it always does the throttle.bios 1bios 2

[johnnyenglish]

10X Scalar could be too much for you. I had some issues while setting up scalar too, not sure why it resulted in a lower cinebench score since temperatures were not that bad but maybe it cannot sustain the boost duration all the way for some weird thing.

The CPU only boosts (or keep boosting) if all conditions are met. I feel you may be falling short if you push to much, however, that doesn't explain the throttling.

Try leaving Scalar at AUTO with no clock overrride and bench it only using Curve Optimizer.

If it still throttles, dont use CO and do just a regular negative Offset undervolt to see if the behavior continues. We could be chasing a wild bug here, however, it could be just bad silicon.

[Osireion]

I'll definitely give it a try, I think maybe I might have a weird chip because with a regular OC it's doing some weird things, for instance my current OC is just a 4500 MHz all core with voltage in bios set to auto, and then DOCP settings for my ram, LLC set to 1. And when I run r23 like this it completes it fine, gets around 29.2k, however if I manually set the voltage for it to be higher, temps will stay fine, but it still crashes? So like with voltage set to auto it's getting even less voltage but somehow stable, yet if I increase the voltage my temps still stay fine but r23 will crash after 8 mins or so. Maybe I have a weird chip or my mobo is acting weird, not really sure how to to test. 

[FunkZ]

I agree with @johnnyenglish leave the scalar on Auto and I would also leave the Thermal Limit on Auto, no reason to bump that 5° if it's never hitting the 95°C anyway.

[Osireion]

Hm, so I tried running it again, scalar set to auto, thermal limit set to auto, just using motherboard limits, max boost of 125 with undervolt value of -5, -10, and -15, on each run it does the same deal, runs for about 3 mins and then the 500 MHz throttle happens. I tried lowering my EDC value as well to 160 from the motherboard limit of 200 that it hits in ryzen master, and still same thing happens. Could my motherboard be damaged or something? 

[johnnyenglish]

Have you got the chance to see VRM temperatures? Just to rule out that.

Have one idea, use Ryzen Master 65 ECO mode and then add curve optmizer (just for trooubleshooting reasons).

Good Luck

[Osireion]

I posted them above in a response to FunkZ, not sure if you were able to take a look at them or if they're showing. But it's 2 pictures, shows hwinfo64 hwmonitor and ryzen master during the r23 bench, one pic right when the 500 MHz throttle happens and the other is when it's running normally, the motherboard temps all seem fine unless I need to look elsewhere for the VRM temp

[FunkZ]

I didn't see anything on your RM screenshots that should warrant throttling, much less dropping to 500MHz.

If the CPU behaves as expected with all stock BIOS settings I would say this could be a motherboard BIOS bug.

[Osireion]

Hm, so should I try and roll back to a previous bios version? With stock settings it'll get around 24,000 in r23 so I'm guessing the chip is fine, maybe something with the bios version is messing with it?

[Osireion]

Also those bios settings below were applied after i reset to optimized defaults, I know on the right it says cpu multiplier set to 45 but that's from my previous OC, after optimized default both cpu core ratio and voltage are set to auto