It's been almost 2 days since I had the gpus. Progress is being made, I started with the rig running at very high temperature, around 105 Celsius. After, hours of tweaking and testing I have managed to reduce the "Junction" temperature drastically.

If you're using Afterbuner for overclocking/underclocking remember with the Radeon VII there will be two temperature to monitor :

GPU1 Temperature
GPU1 Temperature 2 (Junction temp)
 
Always remember "Junction" temp is very important as this is the temp inside the gpu, this must not exceed more than 90ish Celsius if you want the units to have longevity.

Using the settings below, I've been able to reduce temp from 105 Celsius to 80-82 Celsius which I think is huge improvement.

70% fan, 1600 core, 865 mV, 1000 memory, Power Limit -20

The above settings should give your gpus ;
70 C GPU and 80 Junction and around 900 watts

Average Mh/s @ 82

Remember my watts are based on 4 GPUs

What do you guys think about running gpus around 80 Celsius, is that too high?