Share your RX560 undervolting experience

[ao_ika_red]

Hello everyone. Just got Sapphire RX560 from a year end sale few days ago. I've read around the internet that Polaris card could be undervolted safely without any issue. But, most of the information are about Polaris 10 cards (RX470, 470D, 570, 480, and 580) and I can't find enough data for Polaris 11 cards (RX 460, 560D, and 560).

The reason why I want to do this is because I live in warm environment and right now is participating in Folding@Home challenge in Distributed Computing sub-forum. It needs to operate almost 24/7 so if I can operate it as cool as possible (with stock clock and fan setting) I'll be happy.
Any information is appreciated. Thanks in advance.

ika

 

[coercitiv]

You can simply try to go straight for the voltage that is already stock for your memory. The way Polaris cards work is that chip voltage cannot be lower than memory voltage, hence many thought they were undervolting their Polaris 11 cards to incredible levels when they were actually hitting this limitation.

A reference value for memory undevolting that I can give you is 850mV. Try that first, see if any errors pop up (HWInfo64 can report memory errors for Polaris). If memory runs ok then start undevolting the GPU, start with 1000Mhz @ 850mV or whatever other frequency state is slightly above 850mV at stock. Keep increasing frequency as long as your load is stable (compute, games, whatever you use it for).

 

[ao_ika_red]

Thanks for the reply coercitiv.
I managed to undervolt the memory as per your prescription and no issue as far as I concern. Right now I can run 1300MHz/1040mV configuration also without any issue and will dial back incrementally by 5 mV per day.

 

[ao_ika_red]

Undervolting update:
Finally hit the bottom end with 1300MHz/950mV. Having a lot of result error below that configuration. GPUZ reports 60°C (ambient 28°C) with moderate fan speed of 1400rpm (30%). My ASIC Quality is 67.9%