only asrock knows if the 4700g will work, we the consumers have no concrete knowledge yet.
From the A300 Bios Mod thread:
I see no reason to doubt this. ASrock has already been reluctant to add CPU support to the A300, and given the low price (and accompanying low margins) of this product I would bet they want to launch a new and improved version for 4000-series APUs, hopefully with a beefed-up VRM to power the new iGPU.
Guess I missed that post, I am sad.
Ah, it is really bad news for me!
Maybe you can have it shipped to someone in a country it is sold in, and have them send it to you that way? Like a proxy service. I'd be open to helping in that way.
Thanks for the offer.
If they make an updated version (say, one with stronger VRMs, which I would say is needed for those APUs) or even an... A500? based on a "new" chipset-less platform, it might make it easier to mod the bios of the A300 to support the new APUs.
I ran my machine stable at 1.35 volt for months and just switched back to XMP profile for the DDR4-3200 ram as it would crash after long periods of heavy work loads. It would also Crash if I used Jitsi and YouTube at the same time. I tried to see if I could fit a Noctua server fan in the case to blow air onto the ram but that was a no-go.
First gen Ryzen (2200G is Zen 1) is very picky on memory and the model you have probably has Hynix MFR chips which are notoriously unstable on first gen Ryzen above DDR4-2933 profile overclock. The Hynix CJR chips used on for instance the Crucial Ballistix Sport LT DDR4 3200 CL16 are much less difficult and can run faster.
Today I found out P-State underclocking (and to a very limited extent overclocking) works on Deskmini A300, at least in BIOS P1.20
P-States (Performance States) are certain steps in frequency the OS or firmware can request a processor to run on. Lower P-State numbers are higher performance states. P-State 0 is the highest non-boost clock, e.g. for a 2200G 3.5GHz. Boost is a state on top of that, controlled by the processor, so not controllable by the OS (afaik...).
Here is what works:
- If you disable core performance boost as I had outlined in a previous post, the highest state the processor can run at is non-boost P0. This state can be controlled in BIOS (Advanced -> AMD CBS -> Zen Common Options -> Custom Pstates / Trottling -> Accept). Leave DID and VID alone and increment / decrement FID until you get your desired MHz value. FID is in Hex and incrementing / decrementing by 1 will yield 25MHz change, as long as you left DID alone.
- Any custom frequency up to the default processor boost clock will work fine. I.E. you can set your processor to run at a frequency lower than default base clock or higher than default base clock as long as frequency does not exceed the default boost clock. Probably due to A300 OC lockout.
What doesn't work:
- Frequency higher than default boost clock. E.g. on my 2200G I can set P-State 0 to 3.7GHz (the default boost clock), while boost is disabled and the processor will clock to 3.7GHz under load. However, if I set P-State 0 to higher than 3.7GHz the processor will still only clock to 3.7GHz.
- Undervolting does nothing. I set P-State 0 to 3.7GHz, voltage to 1.25V and stressed the CPU. The core voltage was exactly the same as running default P-State with stock boost (~1.36V)
What could this be used for:
- Setting P-State 0 to higher than base clock makes little sense. Just use default and boost (unless you want to the processor to clock only to somewhere between base and boost clock, then disable boost and set P-State 0 to your desired clockspeed)
- Underclocking shaves off massive amounts of voltage, power consumption and heat. At P-State 0 3.2GHz and boost disabled, my 2200G does not draw more than 20W CPU Core. It will take minutes under 100% CPU load for the processor to climb to more than 50°C under the stock cooler at 1000RPM. At stock clock with boost enabled it takes only seconds to jump to more than 60°C. You save much more power than you lose performance at full load, e.g. 15% less performance for 50% or more reduction in power draw @ 3.2GHz.
Now you could say one could use cTDP for similar effect, but that does not allow one to control power consumption of the different parts of the APU (CPU and iGPU) independently. If you underclock only the CPU, the iGPU is not limited at all and can draw as much as it needs, there would be no competition for thermal headroom.
Pic, stressing the CPU @ 3.2GHz:
