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Alaqdas

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Discussion starter · #1 ·
Hey! I've been trying for a few weeks to stabilize my CPU with PBO and +200 frequency increase but without any success, even using a positive offset I can't escape BSDOs.

My configuration:
Ryzen 7 5700x
B550M-TUF-PLUS
Kingston FURY Beast 32GB (2x16GB) 3600MHz XMP/D.O.C.P
RTX 3070
Corsair 650w PSU

When I started using the curve optmizer I made the standard, I took the reference from the Ryzen Master which placed the curves at -30 for all cores. Then I started testing with CoreCycle with YCruncher in the 20-ZN3 ~ Yuzuki preset, in which I reduced each core to each error and BSDOs. (I used the Windows event monitor for this.)

I arrived at a current configuration of: -30, -27, -30, -26, -24, -27, -28, -20.

But strange things happen, some cores don't show errors in CoreCycle, but they do in games and in Prime95 testing with the blend.

The main and only one is core 6, which throws me a BSDO even with a positive curve, currently at +8.

Furthermore, I only have BSDO with this core when I'm playing, more specifically War Thunder, but only when I'm in the menu playing a background video in the browser. (which became my new test for this core).

When a BSDO occurs it is of the type "Cache Hierarchy Error" and also "Bus/Interconnect Error", (the latter being much less common, so far it has only been twice.) Of course, not least, when these BSDOs occur I receive a message when restarting from "CPU Over Temperature Error", but the most ironic thing is that the temperatures are ok, within the range of 60c~70c.

Does anyone have any tips on what might be happening?

Searching the forums I saw that it could be the memory frequencies, or even the vsoc voltage, and also the C-States. Could these things cause this instability?
 
+200 might be too much frequency, not every Zen3 can do +200. And 5700X is already lower-binned than the other chips. Does the instability persist with less frequency boost, like +100 or +150? I would try more VSOC too, maybe set it to 1150mV and see if that helps.
 
Trying to OC Zen 3 is pointless. My 5800X won't accept any positive offset. Just lower the voltage to lower the heat and let PBO do it's thing. That way, I normally get 4.85 to 4.9 GHz in light core workloads.
 
Discussion starter · #4 ·
+200 might be too much frequency, not every Zen3 can do +200. And 5700X is already lower-binned than the other chips. Does the instability persist with less frequency boost, like +100 or +150? I would try more VSOC too, maybe set it to 1150mV and see if that helps.
I tested core 6 at +10 to see if it stabilizes, and even so I receive BSDOs, the latter being of the "Bus/Interconnect Error" type.

I'm on the fence because I think it could be the memory frequencies with the FCLK, especially with this "Bus/Interconnect Error". However, having to reduce frequencies just because of the PBO OC, in my opinion, is not worth it.

These are my RAM settings in ZenTimings:

Rectangle Font Parallel Screenshot Technology


I'm going to increase it to 1.115v and do some tests to see if it stabilizes.
 
Discussion starter · #5 ·
Trying to OC Zen 3 is pointless. My 5800X won't accept any positive offset. Just lower the voltage to lower the heat and let PBO do it's thing. That way, I normally get 4.85 to 4.9 GHz in light core workloads.
But can you reach these frequencies without using the PBO frequency boost?

By just reducing the curves I can reach 4.6 GHz on all cores under most loads, but I wanted to squeeze a little more out of this CPU using the PBO OC, from what I can see it will be difficult to achieve without some adjustments.
 
Manual OC is all core. It will go to 4.85-4.9 in only a few cores at a time via PBO.
 
But can you reach these frequencies without using the PBO frequency boost?

By just reducing the curves I can reach 4.6 GHz on all cores under most loads, but I wanted to squeeze a little more out of this CPU using the PBO OC, from what I can see it will be difficult to achieve without some adjustments.
Hi, what @umeng2002 stated is true, seriously, even with my previous 5950X I used a +125mhz offset and got it stable, but even without using it I found that my clock frequencies were basically the same. Leave the core frquency off-set and focus on stabalising everything with PBO curve optimizer. Zen 3 works best letting the system do what is best just by tweaking the PBO and curve optimizer.
 
Increase power limits.
 
Yes, that is needed too. Be careful with PBO limits. If you set the EDC Limit over 140 Amps, PBO turns off silently. Raise the other two as high as you want.
 
u want to adjust cpu vcore loadline calibration. i dont know why ppl dont mention it but its huge factor in zen oc.
 
[QUOTE="mfdoom7, post: 29287910, member: 241825"
u want to adjust cpu vcore loadline calibration. i dont know why ppl dont mention it but its huge factor in zen oc.
[/QUOTE]
Not really, I never touched it with my 5950X. I understood the need for it back in the day but right now I feel it is a waste. Probably because I prefer a motherboard that deliver as close as possible to the selected vcore than being way lower or higher.
 
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I always forget about LLC, at least when using PBO. Watching an old Buildzoid video about Gigabyte AM4 boards, her recommended a "Medium" setting - but this is just specific to Gigabyte B550 AM4. All motherboard manufacturers seem to have random meanings and behaviors for their LLC settings.
 
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