i7 - 2600

I was searching for an AMD equivalent of the I7 2600 (4 Cores, 8 Threads @3.4GHz ).When I stumbled upon the FX-8350 It seemed a better CPU with 8 Cores, 8 Threads @4.0GHz but when I looked up some benchmarks I was quite surprised to find out that the I7 2600 was around 10% better. I don't really...

So I need to replace my motherboard (since the one I own currently is very old and doesn't support newer GPUs) and my current CPU, i7 2600, has the socket LGA 1155. The cheapest motherboard for that socket (as far as I know) is around 130-140 euros. Is it worth it to upgrade my motherboard to...