I upgraded my 3570k to amd 1700 for my desktop PC (running at 3.9ghz). Did it mainly for productivity but the gaming upgrade has been really good. Especially with minimal frame rates. This CPU doesn't get hot either. It's never breached more than 59C in hardest stress tests with all cores going at 100 percent. I have a noctua uh14s on it so it's a good cooler but still the chip doesn't go crazy for heat.The best thing about Ryzen is that you don't need to buy a new motherboard for Ryzen 2.
Intel are locking Coffee Lake out of existing compatible boards :/
I currently have 2 PCs, a i5 4690k and i7 4790k
I'm going to upgrade the i5 to a Ryzen 2 8/16 minimum.
It's really nice I can upgrade to Ryzen 2 if I choose to do so with the same motherboard.