Hmmmm. Yeah I guess the consensus so far is that 8x PCIe 3.0 is more bandwidth than any existing GPU knows what to do with. Kind of sucks that my CPU is limiting that aspect of it if I cannot utilize the first slot. Just because of an unfortunate HSF metal fan clip situation... I'll come up with something if necessary, but it does seem like I can happily leave the GPU in slot no. 2 until such time as I decide to get another GPU or something and then I can swap out the D15 then.
But are there ANY mobo's out there, then, for which D15 doesn't impinge on the first PCIe slot?? Also I do find many reports of people using sabertooth with D15 and no complaints of graphics card impacting (if anything theres more concern about RAM clearance, which I'm not worried about one bit because I'm always happy to start hacksawing the RAM sinks.... once they pass a few days of memtest...)
I did some more reading up earlier tonight and it's not really clear to me what (in concrete terms) the 14+3 phase power will give me (compared to say, G1's 8+2), what is clear is G1 has one extra DVI port, and I do have two DL-DVI-only 27" monitors.
At any rate I'm sure I will be completely happy, and I will have a $8 DP-to-miniDP adapter which I should be able to use with my miniDP-to-DL-DVI adapter should I really desire to drive all of those monitors (my 4K tv and both 27inchers and maybe one more little screen) from the EVGA card.