Ryzen Question

[AWT]

Hi. I installed my new Ryzen 5700X3D today, and I noticed it only ever clocks to about 4040MHz. I have set a target speed of 4.2GHz in BIOS, but it doesn't seem to even attempt to reach that speed, it somehow seems limited to the lower frequency. I tried enabling/disabling core performance boost and core precision boost, but it doesn't make a difference. I read somewhere that it may have to do with the CPU running into a power limit, but manually setting the voltage to 1.30V instead of 1.25 (which seems to be the "Auto" setting) didn't change the behaviour (it does occasionally eat the additional voltage offered, but doesn't increase the frequency.
What can I do (what settings could I try) to get to try out what the CPU can actually handle?
(On my old Gen1 Ryzen, all I had to do was to set a target speed, and it would actually run at that or give a post error).
Thanks in advance.

[AWT]

_I_ eredeti hozzászólása:

what mobo?
many cheap boards do not really support the cpu
they list it because it fits the socket but if the vrm config is not strong it will throttle way before the cpu can get warm

My MB is the ROG Crosshair VI Hero (my full specs are listed in my profile/bio). I think it's because of locks set up by AMD.

[r.linder]

Yes, X3D is locked down, your cpu is performing as expected

[Sikobae]

PopinFRESH eredeti hozzászólása:

EDIT: And to be clear, increasing the voltage on the X3D CPUs as you're describing in the OP can permanently damage the Vcache. It is already designed to boost as much as it is safe within the safe voltage range for the cache along with the thermal sensors in the CPU.

If anything, undervolting can get a performance boost. If you have Kombostrike (which I think is MSI specific), it got me to 4.45 after being limited to 4.2.

[AWT]

I will try undervolting it. What voltage does your MSI software set to achieve the increased frequency?

[_I_]

undervolting is the same as overclocking

lower core voltage = less stable and lower temp
if its unstable, lower the oc or raise core voltage

[AWT]

I currently have all CPU settings on auto, as I realized the CPU won't respond to my manual target speed inputs anyway (even if I raise CPU voltage to 1.30, it doesn't clock any faster).
Auto has it limited to 1.25V.
I would happily limit it to 1.20V though if it still runs stable and maybe even works faster - is that something worth trying?
(My CPU is running quite warm in idle, around 50°C)

[kiwikev]

What cooler are you using ?

[AWT]

ROG Ryujin AIO watercooler. My old Ryzen 1700 ran at 30-40° in idle with the same cooler. My full specs are in my profile/bio.

[Illusion of Progress]

Undervolting isn't going to allow it to clock higher than its maximum clock speed.

What it may allow, however, is for the multi-core boost to be higher (since this is usually lower than the maximum due to both thermal and/or voltage reasons).

For example, on the 5800X3D, the maximum boost is stated as 4.5 GHz. I often see 4.45 GHz with brief moments of 4.55 GHz for maximums, but these are usually the result of measurement differences. This normalizes to about 4.5 GHz. Different software simply has different measurement precision.

But that's when one or a couple cores are under load. When all are under heavy load, I often see ~4.3 GHz plus or minus.

Likewise, the 5700X3D is listed as a 4.1 GHz maximum boost instead of 4.5 GHz, so if you're seeing 4.05 GHz a lot, that matches up exactly with what I'd expect. It might even drop to ~3.9 GHz under high core loads. Undervolting it will possibly bring lower temperatures and higher multi-core boosting (this is why some benchmark scores increase), but the absolute maximum won't go up.

The 5700X3D simply misses out on just under 10% of the clock speed (~.8.8% to be closer), and likewise, that's just about how much slower than the 5800X3D it tends to be. It's not like the 3700X compared to 3800X, or 5700X compared to 5800X, where it was "almost the same thing at a much lower price". In this case, the x700 model is missing a fair bit of clock speed (to the point the 5600X3D often outperforms it due to being clocked higher). It's often still a better value, but the results you're seeing are expected.

I'm not sure if the 5700X3D is binned as well but the 5800X3D almost always does -30 rather reliably.

[AWT]

Where do I enter the -30? At core voltage (offset), or do I have to find the settings where I can set that for each individual core?

[Illusion of Progress]

It depends on the motherboard on where in the BIOS it is, but yes, that refers to the voltage offset and -30 is the lowest you can input I believe (at least for the 5800X3D, and I presume the 5700X3D would be the same here).

[AWT]

But do I have to enter it per core, or just as a general offset for CPU core voltage?

[_I_]

the board cant control voltage per core

it has separate vrm for the imc (memory controller), igpu and cpu cores

[r.linder]

I would just leave it at factory settings, it’s not worth the effort tweaking things when you won’t get very noticeable benefits and it can be a pain to get it running stable

[skOsH♥]

They run more efficiently than other Ryzen CPU's until you overclock those CPUs. So having one that performs as well as an overclocked Zen 3 non3d chip, your best going with just using factory default