AB350 Pro4 Does not POST after voltage change

OP, when Overclocking Ryzen CPU, you also need to increase RAM voltage.
Mine didn't post until I set manually RAM voltage to 1.35.
I noticed that this MB doesn't like Hynix chips at all. Was running 2800mhz RAM speed for a week when all of a sudden it refused to post. So I had to settle on 2666mhz. And even then I couldn't tighten timings.

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datonyb wrote: i had a similar thing the other week on an msi b350 setting 3.8 ghz and then dialing in a 1.35volt resulted in dead pc until cmos reset

I have a similar problem, except I can't get the CMOS to reset.

Ryzen 1700. b350 Pro4. Bios 3.00. The board is a couple weeks old.
3.5ghz @ stock (1.18?) volts, booted into Windows fine.
3.7ghz @ 1.2v (1.225? I don't remember) volts, booted into Windows fine.
3.9ghz @ 1.225v (1.25?) volts, the CPU fan did a couple reboots like it didn't like that setting, so I figured it would drop me back to stock, but then when it booted, there's no monitor output, and apparently it doesn't post now.

Reset the CMOS, right?
Disconnected the power cable, used CMOS jumper.
Took out battery. Let sit overnight.
Held power button for 30 seconds.
etc. All sorts of combinations of that. It won't post. Or if it's posting, I can't see it on the monitor.

If I remove the memory, the CPU fan reboots every 30 seconds, so I know the board is looking for memory.

I put my video card into a different computer to make sure that didn't somehow fry. Still works great.

It's hard to believe I fried a CPU with 1.25v during 20 seconds of rebooting and a big 120mm cooler on it.
Maybe the bios is corrupted, but if that was it, I wouldn't expect the board to boot loop every 30 seconds if I remove the memory.

Edited by efm - 30 Oct 2017 at 11:26am

No, you do not need to incrementally update, just grab the latest version and update.

Zach1928 wrote: Was there ever a resolution to this? I'v had the same issue trying to OC my R5 1400 on the B350 Pro4. As for voltage- there is no auto option once the OC mode is set. 3.8ghz at 1.35v is stable in Ryzen master, but the pc wont boot if done from the UEFI. Also running the P2.6 UEFI

First, why are you using a UEFI version that is two AMD AGESA updates behind the current 1.0.0.6b? You really should update to version 3.20. AMD is still catching up with the CPU microcode for Ryzen (AGESA is the microcode) and will be releasing a new major update in the near future with AGESA 1.0.0.7.

http://www.asrock.com/mb/AMD/AB350%20Pro4/index.asp#BIOS

If you are familiar with the history of Ryzen, you know that it was rushed out by AMD before it was completely ready. What other reason for any basic problems over clocking would there be besides immature UEFI/BIOS versions with incomplete CPU microcode and UEFI code to match?

If you check some of the almost 500 user reviews of this board at Newegg, you won't find any consistent issue with over clocking. Plus the overall rating for this board is five stars. I normally don't go by Newegg reviews, but with that many it must mean something.

Do you believe using the Auto VCore mode will fix any over clocking problem because one person said that in this thread? It can help, by applying a higher than necessary VCore, but disabling the Auto VCore setting is the first thing any experienced person doing an OC does.

3.8GHz is a high OC relative to Ryzen processors. 400MHz over the max Turbo frequency is a dream for 1700/1700X and 1800/1800X users on X370 boards.

Please update to the 3.20 UEFI before we continue trying to help you. Please use the Instant Flash UEFI update method, it is the most reliable. Please perform the update with stock settings in the UEFI.

Yeah I currently use Ryzen Master, which requires the Voltage to be left at auto. I disabled core boost, so the voltage usually stays around 1.125-1.2 volts @ 3.2GHz...

Edited by Iambread - 14 Sep 2017 at 11:26pm