overclocking ryzen

I have a gtx 1080 ti but my cpu holds it back a ton. I've been using a Ryzen 5 2600 for about 6 months with a gtx 1070. I got a really good deal on a gtx 1080 ti for $370. I was wondering if I should upgrade to ryzen 7 or overclock my ryzen 5 2600. My motherboard doesn't support ryzen 7...