OK guys, so I've got some updates here

I tried lowering the core clock but from what I could see on the wall meter it was almost not making any difference, I did go as low as 800mhz and the difference in power consumption was not more than 5 watts

I'm still unable to unlock the voltage control for my AMD card on Afterburner while voltage control is available when I select my 1070 that it present on the same rig, tried searching for the integrated gpu on the device manager but I couldn't see it

Also tried using OverDtivenTool to lower the voltage but I was having very low hashrates whatever I was doing, the tool is a bit confusing and I didn't find many resources online to walk me through properly using it

In the meantime I added a second similar RX 570 MSI Armor GPU in the rig, flashed it with the same mod BIOS however I'm getting mixed results, when running at 100% PL I get full hashrate between 30 and 30.7 mh/s for both GPU's, if I drop PL to 90% I get 30mh/s on one card and 27mh/s on the other card, dropping to -20% PL will give me even worse hashrates for both

100% PL with 800 core and 2200 memory are making my GPU's to draw about 140w to 150w each at the wall which way too much

Any other recommendations guys on how to tweak these cards to lower my power consumption while keeping a decent hashrate as lowering the core clock isn't really helping, should I use a different mod bios to begin with ?

Thanks