Associate
Sig is exact, I have an EVGA P6 1000w.
I went Suprim, Suprim, Giga, Suprim. This was whine, whine, thermals, SUCCESS. I run 1440UW or 4K, no difference in noise to either tbh. I couldn't speculate on the board contributing to whine and I guess in my experience it doesn't make sense as 2 were awful. The Suprim isn't as quiet buzz wise as the Giga but it's like difference of couldn't hear GIG with ear to case, and can hear the Suprim maybe 1 inch away but I don't sit that close so I don't hear it.
yeah it would seem mobo would not be the issue, but I have seen evidence to contrary and it actually does make some sense it could be it. Mobo does in fact provide 75 watts of power through PCIe slot. Yes it is a small amount compared to what is provided through 12vhPWR or PCI-E 8 pin connectors, but it still is extra power and could very well influence how the power is distributed among the card. Sometimes the little things make a big difference in how frequencies vibrate and if they are audible or not. Just like PSU and even the AC electricity supply to the residence. I imagine a small amount of extra 75 watts from separate source could cause different behavior on cards in terms of coil whine given often there is no rhyme or reason? Though I am not 100% for sure on anything.