I currently have an i7-4790s and want to upgrade. I have a budget of around 300-400 USD for the CPU as long as I don't have to buy any other components other than a mobo and maybe a new PSU. Currently have this PC: http://www.userbenchmark.com/System/Asus-K30AD-M31AD-M51AD/4263 upgraded with a 970 and a 750W PSU. I specifically want this new CPU for gaming and VR, will I see a significant FPS increase with a CPU from that budget? Please let me know if I'll have to change anything other than the mobo to support your suggested CPU. Thanks a lot!