Wow, regardless of what others are saying about W7 being too old...well it is but that's besides the point. Some of us have legit reasons as to why some of our systems are still W7, so relax.
Just to confirm though that even though I am forced to use W7 on one of my systems that I have been able to successfully hash at a pretty decent speed.
8GB 580
XHV @850H/s vs. 200H/s with the latest Adrenaline drivers
RVN @11.5MH/s vs. 9MH/s with the latest Adrenaline drivers
I'm still working on Phoenix with W7 to test my ETH speeds but for now I'm content with XHV.
I downloaded robinh00d's 7z files and extracted them which were actually version 22.19.659.1 drivers and the atikmdag-patcher as he described.
I then downloaded the AMD-Compute-Switcher and walla!
This has taken me a few weeks to figure this out and I know that W10 would have been far easier but that simply is not an option for this instance.
Now my mission is to figure out fan control as 68 degrees with only 34% fan speed is not good. OverdriveNTool does not seem to work in W7 regardless of what version I attempt with whatever AMD driver versions. However so far this is a step in the right direction. Any suggestions on GPU fan control within W7 would be welcome.