You'd probably get a good price for that graphics card at the minute, with the mining craze going on! And good to hear it does better than we thought in Starcraft 2 as well.
I installed overwatch the other day and the 1800x was having no trouble at all maxing out the 1080ti, it was pinned at 99% all the time it was below 165fps (monitor refresh rate) and getting up to that 165fps pretty often. (all settings maxed at 1440p) I need to get some time in on that game now, I'm a total noob on it at the moment!
This is the first time I've played a first person shooter with a monitor capable of displaying such a crazy frame rate, it's a cool experience! I don't think I could go back to a 60hz monitor ever again now..
So far these games i've tried all run stunningly well on this hardware: overwatch, witcher 3, assassins creed syndicate, project cars, alien isolation..
as mentioned before, Fallout 4 is the only game I've tried that has problems, just because it's not coded well for multi threading. But it runs great most (>90%) of the time.
Just finished installing Prey, I'll try that out tomorrow, looks interesting.
I'm still not fully maxed out on the RAM clocks either, I'm back on the 1002 bios for the crosshair at the moment so running at 3200 14-14-14-34, but it's capable of running it at 3700mhz with base clock overclocking or with elmor's beta bios wither higher memory dividers. I flashed back due to weird stability issues while running WCG, but when the next official bios comes out supporting higher speeds it'll be pretty cool!