overclocking Ryzen 9 5950X PBO Core Voltage Help

[Eggicus Roundplumpius]

Alright, before I go and daily these settings, could anyone tell me if they're safe?

• PBO is configured with Auto Scalar & Default Limits
• Asus Core Performance Boost is enabled.
• Curve Optimiser set to -15 on almost all cores and -10 on two of them (this is what I found to be stable, -30 wouldn't even boot).
• Core, SOC Voltages are set to Auto, reading as 1.353V and 1.080V in CMOS respectively.
• In single-threaded workloads, VID reads between 1.2V and 1.26V
• Clocks range between 4.69Ghz (nice) and 4.95Ghz in single-threaded workloads, steady at 4.6Ghz all-core in Cinebench
• Max temperatures are around 87⁰C (it's a bit toasty but I think this is all my NH-D15 can do at over 210W all-core)
• DOCP at 3600Mhz, Auto Voltage reading at 1.352V

 

System Specs:

• AMD Ryzen 5950X (PBO Enabled, Core Enhancements Enabled)
  • Noctua NH-D15 chromax
• Corsair Vengence LPX 3600Mhz/C16 (DOCP Enabled)
• Asus Crosshair Dark Hero VIII X570
  • Samsung 980 Pro 1TB x2
  • LG Optical Drive
  • Hotplug 2.5 inch SATA Bay
    • Samsung 870 Evo 2TB
• Nvidia RTX 3090 Founders
• LSi 9211-8i HBA
  • 5x Seagate IronWolf Pro 6TB
• Corsair HXi 1000W PSU

[freeagent]

Nice, we have the same VRM. My board is the B550 version of yours

 

Knowing that, I would roll back to the first bios that supports Win 11.

 

And then manually set your power limits, I use 240/160/190.. you might be able to get more because you have 16 cores. You should be able to do a better job with CO. Ideally you should be hitting 5250, I can hit 5150 no problem.

[Damocles Ti]

Yes, your settings looks safe but I do have some things I want to share with you. Unless you start touching voltages the CPU will NOT kill itself. My experience with the 5950x is that the power limits heavily affect multicore sustained effective clocks. When you run a multithreaded benchmark like Cinebench R23, the clocks lower for 2 reasons: temperatures or power limits. Setting power limits higher lets you reach higher effective clocks but also higher temperatures since you're drawing more power. 

some concerns though:

 

1. SOC is voltage for the memory controller on the CPU. I have no idea where the 1.353v came from (Core voltage auto?), but the 1.08v is normal. I've messed with memory and I hated it. I don't recommend touching this unless you know exactly what you're doing with RAM oc. In particular, you don't touch this unless you have ram going past 3600Mhz and the Fclock needs more voltage to match 1/2 of the RAM frequency. Just leave it on auto SOC, 1800 Fclock, do 3600Mhz which is what you have and tighten the timings because increasing SOC voltage also increases heat and stress on your CPU.
2. We have the same motherboard, most bios versions on the X570 dark hero are borked and EDC cannot exceed 140 amps or else the voltage tanks. (I think 3800 something is when the bug started) Update to 4501 where it is fixed. Also if you mess with power limits for all core performance, make sure in the digi vrm tab to turn up the current capability to 140% because this is the shutoff point for the vrms after some %age of current draw. This doesn't matter imo if it's red, we're going to be limited by EDC which I will explain a bit more later on
3. The power limits for default PBO is very saddening. You shouldn't buy this motherboard if you're not going use the extended power ranges and controls the motherboard hardware provides.
   • Default limits are TDC/EDC/PPT of 95/140/142, these are 95 amps when thermally constrained, 140 amps normally, and 142 amps from the socket
   • I recommend starting with maxing out TDC and PPT to 255/140/395 (motherboard limits except for EDC). You will never reach maxed TDC or PPT anyways, you're just making the power limit to the EDC setting. Increase it by 10 amps until crash/thermal throttle/scores are lowering which can be done on desktop with Ryzen master, then pull it back to the last best results. It's also entirely possible you can do no limits outright and set to Motherboard as limit which I was able to do, but you should monitor your scores and temperatures as you increase EDC to find what's best for your CPU and cooling.

[freeagent]

43 minutes ago, Damocles Ti said:

EDC cannot exceed 140 amps

It was TDC that was bugged. If you go  back to 1203C you can run it high again. EDC was never a problem.

[Damocles Ti]

10 hours ago, freeagent said:

It was TDC that was bugged. If you go  back to 1203C you can run it high again. EDC was never a problem.

For a second I thought you were right, but then I went back and checked. It was EDC bug, not TDC

[freeagent]

9 minutes ago, Damocles Ti said:

For a second I thought you were right, but then I went back and checked. It was EDC bug, not TDC

Weird. With newest AGESA I can max out EDC no problem at 190 with PBO, if I set TDC to 160 I get 140, which will not do for me.

[Damocles Ti]

On 6/21/2023 at 9:07 AM, freeagent said:

Weird. With newest AGESA I can max out EDC no problem at 190 with PBO, if I set TDC to 160 I get 140, which will not do for me.

What motherboard do you have? Power limits are all limited by the motherboard. I see you have a 5800X3D instead, you might not even need the full power limit since you have 8 cores instead of 16. 140 is plenty for 8 cores, and I would focus on EDC and PPT since you're likely not thermal limited and would never trigger TDC anyways

[freeagent]

35 minutes ago, Damocles Ti said:

What motherboard do you have? Power limits are all limited by the motherboard. I see you have a 5800X3D instead, you might not even need the full power limit since you have 8 cores instead of 16. 140 is plenty for 8 cores, and I would focus on EDC and PPT since you're likely not thermal limited and would never trigger TDC anyways

I have my 5900X installed right now. It is running WCG at 4550MHz 208w PPT when I looked before work.

 

I have a Strix B550-XE, same VRM as the Dark Hero. It’s like B550 Dark Hero lol

 

I have 3 CPUs for AM4, all Zen 3

[Damocles Ti]

23 hours ago, freeagent said:

I have my 5900X installed right now. It is running WCG at 4550MHz 208w PPT when I looked before work.

I dont know what WCG. How well does the 5900X overclock? I'm sure the 2nd CCD is nearly guaranteed to hit all curve -30, but what about the first CCD and its fastest 2 cores?

[freeagent]

3 minutes ago, Damocles Ti said:

I dont know what WCG. How well does the 5900X overclock? I'm sure the 2nd CCD is nearly guaranteed to hit all curve -30, but what about the first CCD and its fastest 2 cores?

World community grid.

 

My 5900X does 5150 on 4 cores, 5GHz on 4 cores, and the rest are at 4850-4950.

[Damocles Ti]

53 minutes ago, freeagent said:

My 5900X does 5150 on 4 cores, 5GHz on 4 cores, and the rest are at 4850-4950.

Are these max clocks as in 4 cores at the same time would run 5150 or each core running alone would do 5150?

For me, I have 2 cores that can trickle up to 5250, the rest does 5050 ish, in an ideal all core workload, an all core of 4.8Ghz non-AVX, and an AVX of 4.6Ghz

[freeagent]

Yeah it really depends on what’s running.