I have an i5-3570K at 4.2Ghz along with an R9 290. I'd been thinking of a GTX 1070 as an upgrade but now with the 1080's price cut, I might consider that instead. Is the overclocked Ivy Bridge i5 enough to keep up with a 1080, or would the 1080 be in some sense wasted? I use a 70" 4K display for gaming, but generally game at 1080p now (with 1440p for older games that the 290 can handle at that resolution). I'd like to move that to 1440p in general and 4K when possible.
