As stated - this is in 4K, however results are similar but less pronounced in 1440p, specially when the frames really start picking up. Clearly though, we've figure it out, it's just my weak 5.3 9700k & 3200mhz memory
We're also in two different boats. you want high FPS in 1080p, which i'm guessing wouldn't even require a second card based on 1440p ultra running 70-90 most of the time. Really I believe the issue is the same as its always been. Two cards doesn't do much for ya at higher resolutions if you're already nearing your memory bandwidth cap.
I really do hope you get the epic experience you expect, I do. I'm not trying to talk anyone out of anything (no matter how many times you annoyingly say it, it won't come true), I'm pretty sure that's just your tribal nature kicking in & improperly deciphering these figures on the screen.
People just gotta remember - one beefier card always wins against two mid range cards (specially when the beefier card has higher memory bus!!!!) UNLESS!?!?! anyone remember?! you're gaming in resolutions low enough to not max out the memory bandwidth, as memory bandwidth doesn't scale as most expect it to, in SLI.
it's a funny time right now though, 20 series sucks & many of us are experienced that first hand, thus the only other thing to do is slap on an extra 1080ti for the one outta ten times its gonna work well.
as I stated in the beginning of all of this like 2 weeks ago - I'm not trading in my 2nd card until I see how it fares on my 3440x1440p alienware next month. That however won't change the fact 1 in 10 games support SLI, and that its a dead technology being replaced by NVLink. The more DX12 titles we see, the less SLI titles we'll see, until they get that part all ironed out, which may take a couple more years & we currently get maybe 1 outta 20 with native support, n can maybe get 1 in 5 to work with tweaked support.