overheate

My GPU runs too hot until restart. I need to undervolt so it runs cooler. I don't need high frame rates or resolutions as my screen is 1080p and 60Hz. I think I should edit vBios itself. But I want to use something like AMD Adrenaline Tuning until I get the best settings for the GPU. The...

Basically i was scrolling through a bulgarian second hand side, and I found a I7-4790k for 130 dollars, which is REALLY sweet for an i7 thatI've heard performs almost as well as an i7-7700k in some benchmarks. So basically, is it worth it, and can I get scammed by getting like a burned CPU...