I did check out the efficiency calculators for PSU's and they showed that if I moved to a Platinum level PSU, I'd save about $20 per year. I'm not really inclined to spend $200 to save $20 per year since the recoup time on the investment is 10 years. As well, I made and sleeved all my own cables for my ST-1000-P, so going to a whole new PSU would likely mean making new cables, which is a time investment I'd rather avoid.
In regards to the EPS thing - the issue is that the new mobo has a 4x2 ATX 12v connection, which I have on my current system, but also has a 2x2 ATX 12v connection, which I don't currently use. I was planning to use the open EPS 12v 4x2 connection on the PSU to supply power to the 2x2 ATX 12v connection on the mobo.
AFAIK, 12v is 12v whether it's officially and ATX or EPS designated port, correct?
Gigabyte Z390 Aorus Ultra
EVGA GTX 1080 Ti FTW3
Corsair Dominator Platinum
Samsung 970 PRO NVMe PCIe M.2 2280
Samsung 860 EVO
Samsung 850 EVO
WD Caviar Green
Samsung Writemaster DVD/RW
Silverstone Strider PS-ST90F-Ti
Silverstone Raven RV02-EW
Steelseries Arctis 7
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