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.

[Rumpelcrutchskin]

It has max core boost clock of 4.1 GHz so looks perfectly in line with that.

[AWT]

My old one (gen 1 1700) had 3.7 max core boost clock, and would easily do 3.9 GHz if I set that as target speed...

[Rumpelcrutchskin]

Originally posted by AWT:

My old one (gen 1 1700) had 3.7 max core boost clock, and would easily do 3.9 GHz if I set that as target speed...

X3D CPUs are not exactly overclockers and this goes for most modern Ryzens. It`s best to just provide adequate cooling to them and let them do their thing instead of trying to manually overclock them. This can end pretty badly with X3D.

[PopinFRESH]

They don't overclock well because the 3D Vcache is stacked ontop of the compute die and is more voltage and thermally sensitive. I'll second what Rumpelcrutchskin said; don't try to overclock it and just let its normal boost work as designed.

Your 1st gen Ryzen didn't have a ton of cache memory sitting on top of it.

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.

[A&A]

They have locked multiplier, so even if it is set somehow to 4.2GHz it won't boost.
Same with the voltage. The maximum voltage these chips can handle is 1.3v

4040MHz is probably because the reference clock is at 98-99MHz or something like that.

[Bad 💀 Motha]

Put the cpu under a full load test while keeping the thermals below 70-75*C

[_I_]

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

[󠀡󠀡󠀡󠀡⁧⁧Kei]

Originally posted by Bad 💀 Motha:

Put the cpu under a full load test while keeping the thermals below 70-75*C

that seems hot for a 4ghz cpu, my 7800X3D never goes above 73 even at a full stress test

[Bad 💀 Motha]

Originally posted by Feiqizi:

Originally posted by Bad 💀 Motha:

Put the cpu under a full load test while keeping the thermals below 70-75*C

that seems hot for a 4ghz cpu, my 7800X3D never goes above 73 even at a full stress test

I'm talking about a 100% load test though which will always make a cpu peak a bit higher then usual.

All those Ryzen cpus are safe anyways to around 85-90*C

[Viking2121]

Originally posted by AWT:

My old one (gen 1 1700) had 3.7 max core boost clock, and would easily do 3.9 GHz if I set that as target speed...

the 1700 and the 5800x3d boost in different ways. They are not the same in how they work. I would also avoid overclocking the x3d chip, not only is it not worth it, it could damage the chip.

[r.linder]

X3D SKUs sacrifice a bit of frequency for cache, there's reason why they're mostly locked down, the cache can easily be damaged and degraded

[Bad 💀 Motha]

Originally posted by Viking2121:

Originally posted by AWT:

My old one (gen 1 1700) had 3.7 max core boost clock, and would easily do 3.9 GHz if I set that as target speed...

the 1700 and the 5800x3d boost in different ways. They are not the same in how they work. I would also avoid overclocking the x3d chip, not only is it not worth it, it could damage the chip.

^ This and you can't even look at or really should care what the Ghz is really because when moving to a newer CPU; it simply has more RAW computing power for clock cycle anyways; so even if a newer CPU is less Ghz, it's often WAY more powerful comparede to old stuff like Ryzen 1xxx or 2xxx series CPUs.

Even a 5600 stock runs circles around a 2700X OC'ed as far as possible on consumer cooling.

Also Ryzen 5xxx and 7xxx series (and soon 9xxx series) can actually Auto OC based on Thermals. earlier Ryzen gens can't do that. Modern GPUs are nearly the same way; like if you can keep an RTX 30/40 series GPU liquid cooled and below 60-65*C it will boost all on its own about as high of an OC that's possible for that GPU without you doing much else. IIRC even my liquid cooled 1080 Ti could do that.

[kiwikev]

1 other advantage the r7 5000 series had over 1st gen was all 8 cores are on 1 ccd so no ccd to ccd latency penalty and around 30+ % ipc increase since 1st gen ryzen, and 96MB L3 cache makes it exellent for gaming.

[Bad 💀 Motha]

Originally posted by kiwikev:

1 other advantage the r7 5000 series had over 1st gen was all 8 cores are on 1 ccd so no ccd to ccd latency penalty and around 30+ % ipc increase since 1st gen ryzen, and 96MB L3 cache makes it exellent for gaming.

Only the X3D varients have 96MB L3
The non-X3D only have 32MB
Except Ryzen 9 series of the 5000 family which has 64MB L3

[kiwikev]

My oops i forgot to put that part (it is getting late here lol) and so far my experience with Ryzen has been to leave it at it's defaults and it will boost when it needs to without issues for me.

I went from a 2600x to a 5700x which is a big jump up and power savings too.

Sometimes trying to overclock can give lower overall performance compared to leaving at defaults.