So, I finally received the two new GPU cards as well as my new PSU as seen in my last post.
It took quite a bit of time to set up considering I had to use my old PSU and jump start it with a paper clip just to get power to my 3rd RX 470.
Here is a photo of the rig (messy I know):
Here is a photo of mining Ethereum on this machine, no BIOS modifications or anything, just stock:
And here is mining Zcash at pretty much 200 H/s per card, total at almost 600 H/s: