You need more than 4 threads i.e. a i7 with 8.
Pretty sure both the i3 and i5 have only 4.
They do. If that's true, then that's a real high cost of entry.
I have an i5-4690k (not overclocked) with a GTX 1070 and 8 GB RAM playing on a mix of High/Highest settings. I get around 90-100 fps most of the time. 130-140 in some cases. Sometimes though it will drop down to 50, but that's very rare, and only on certain maps.
That's strange. Have you benchmarked with Fraps (64 player operations) and taken a look at your 1% time? You see, even at the lowest settings, my 1% time is still just over 40 fps. My cpu isn't that much less powerful than yours, so the difference in fps seems disproportionate.
Edit: I've been doing some research. Can anyone tell me what performance they're getting on an i7-4770? And what video card? It's important that tests are run on a 64-player map. I can get a rock-solid 60fps in 24-player matches just fine, that's not the issue.