all psu's i own work just fine doesn't matter what they are... they're mostly from 15 year old HP's 300w maybe... hahahaha...
See, I understand your point, but that is exactly the kind of response to a serious, professional question, that will get you absolutely zero help from people who are particularly anal about having ALL the details regarding any system they are trying to offer help on. When somebody is unable to provide those details we will most often do all we can to help them obtain them, so that there is a clear picture of what we are working with.
When somebody is unwilling to provide those details because they think they already know what is and is not the problem, we generally tell them, well, good luck, obviously you don't need my help because you believe yourself to be knowledgeable enough to know exactly what is "ok" and what isn't, even though you obviously actually don't since you came here looking for help. It puts people off when a person asking for help then refuses to accomodate those trying to help them by providing the information they've asked for. It makes it a waste of time more often than not because that is exactly the kind of person that by the end of it all isn't going to listen for two seconds to any opinion regarding what we think the problem likely is.
Moving right along, as I said before, I agree that if any given power supply works with an even higher current draw card, then it is highly unlikely that that PSU is the problem HOWEVER that is not always the case because we know FOR A FACT that there are specific power supplies that have problems ONLY with specific cards, so the fact that it works fine with a GTX 980 ti does NOT necessarily mean that the same power supply is ASSURED to also work find with a lower power draw GTX 970. In point of fact, some of the Seasonic Focus units have had problems when paired up with GTX 970 cards. Since your unit is not one of those it makes it unlikely but the bottom line is that I want you to understand that not every issue is about whether something has enough "watts" or not, there are OTHER considerations that you may not know about in some cases or underlying potential causes that might be model specific and we can't evaluate that possibility if you are not playing ball agreeably enough to at least provide the information that has been asked for.
If you're going to ask for help, do yourself and everybody else the courtesy of just offering the information up, even if YOU don't think it's relevant, because it might be. Heck, in some cases WE might not even know that the information is relevant to a specific issue until we've looked into it. That can't happen if we don't have the data.
And just to be clear, when I asked for the specific model, I meant the model of the EVGA power supply, not the graphics card, although that too is helpful so thanks for that.
I think the bottom line here though is that if you've tried the same graphics cards in two different motherboards, with a variety of power supplies that work fine with the same motherboards and power supplies that the GTX 970 does NOT work with, then can be very little doubt that the graphics cards are to blame especially when you factor in the visible capacitor leakage. Capacitors don't need to leak a lot to be completely shot. They don't even need to leak AT ALL to be totally bad. IF they are bulging or leaking, at all, and there are problems, you can usually be pretty sure that they are to blame.
If they are not replaceable, or you have no experience desoldering and replacing capacitors, which is beyond the scope of most people even those who are fairly handy, then I'd say that you have one or more faulty GTX 970's on your hands.