Ryzen 3000 series support

I wasn't completely stable it seems after the drama calculator settings, BUT it was a starting point.
I raised the voltage on the RAM to 1.38. will monitor.
Did the same for my other HTPC with even sh*ttier RAM, Hynix M, on my Asrock x370 Killer SLI board running 5.8 @2800MHz CL14 1T, which is amazing anyways. Couldn't get it stable on this board at stock auto settings @2666MHz before. ??

I have a b450m pro4 along with a Ryzen 3 1200. I cant get any video output at all. I have tried every port and even my Radeon rx 570 8gb OC. I have get to be able to get an os on it due to that I cant see anything on it what so ever. I read the discription of the bios update but it says to fix the video through windows before bios update but I just have no way of doing so. Can anyone help?

Hi Guys

I can't change in my B450 ITX motherboad, the CLD0 VDDG voltage. No matter what I do, it always stays at 0.7V~ according to Ryzen master.

Is anyone able to change this voltage using a Ryzen Zen 2 CPU in a B450 ITX? Might be an issue with this model.


I don't have any issues with the other 2 voltages (SOC voltage and CLD0 VDDP voltage), these 2 works fine.

Nevertheless, I opened a Support ticket with ASRock about this issue, but wanted to have some feedback here as well.

ASRocknRoll wrote: I have a new build, which I'd appreciate some help with. B450m Pro 4 - 3.90 bios Ryzen 9 3900x Corsair Vengeance LPX 3200MHz 2 x 16GB (in A2 & B2 slots) RTX 2080ti Stock Wraith cooler & 2 120mm case fans Ubunutu 18.04 (and Win 10 for testing) Current issues: - Idle CPU temperatures of >50C, reaching 90C under stress. - Unable to boot with XMP settings enabled. - Barring the XMP I've left the BIOS with default settings.

- Reaching 90 under stress is really easy. I have a "nice" cooler (Noctua NH-U12S) and with 8 cores (3700X) with PBO enabled, I can reach 90C as well.
3700X with PBO consumes a bit more than a 3900X without PBO.
And a 3700X without PBO consumes less than a 3900X without PBO naturally.

If you don't use "PBO", you still have a nice high PPT limit in a 3800X/3900X, so you can try 2 options to lower the temps:

1) Enable ECO Mode. This will put lower Package Power. I think it will be similar to a 3700X if you have a 3900X. But a stock cooler, could still have a bad day under unrealistic stress, even with 3700X TDP limits.

2) Get a better cooler. Something really powerful that can handle 130W or more TDP. But know one thing, the better the cooler you put, the higher the frequency and voltages your CPU will demand. So the 3900X will always try to reach 90C (unless there are other limits like PPT/TDC/EDC).


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As for the "idle temps". It's a different story. It's also normal to have high idle temps with Zen 2. This is because when the CPU is not stressed. The frequency goes high, it tries to reach the Boost Clock at 1.5v max. This makes the CPU sometimes hotter in idle (where cores are constantly jumping to 4.3Ghz+), than in a weak load (like gaming) where cores sometimes stay at 4Ghz~ or less, depending on the game, with a very stable load.

The stock cooler is OK for gaming. Because games won't put all the cores to work at full load all the time.

But for full core usage workloads, you need a better cooler. (They will still run colder than P95 max power test, but they will still generate heat).

Yes, it's a different beast, even to Zen+. These CPUs tolerate up to 95繙C. It's within the normal limits. So don't really worry about temp.

If you want to have the cores working 24/7. I recommend you to use "Manual OC" with Underclock and Undervolt. You can run the cores at very low voltage (maybe less than 1.0 or 1.1v) and at lower frequency, and save a lot of money in energy bills. (The stock Precision boost curves add extra voltage to try to provide general stability). But if you follow this approach, try to stay below 1.15v-1.2v unless you read a lot about the topic and understood what is a safe all core voltage. (which is much lower than the one used by Precision Boost / Stock / Auto).


About the RAM issue. I recommend you trying the thaiphoon + DRAM calc solution (works for some, but not for all) and try to set up the ram timings manually, as well as the SoC Voltage and Fabric Clock.
I personally don't know a lot about this. I don't change all the settings, only 80% of them.


But I'm currently running my 3200Mhz "cheap" Micron-E memories at 3733Mhz 18/20/20/20 ("Safe Preset") with 1.45v dram voltage and it's 100% stable in my B450 ITX.
Only thing I should increase is the VDDG voltage, but the settings doesn't work in the B450 ITX BIOS for some reason.
But it is still stable. So I don't worry