Looking to upgrade my CPU, need advice

[The0dark0one]

I'm trying to decide if I should go with an Intel Core i5 4690k or an i5 3570k. My Mobo is an LGA 1155 socket so if I chose the 4690k, I would need to upgrade my motherboard as well. I need help deciding if it is worth it.

My current setup:
Motherboard: ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI 4 x SATA 6Gb/s USB 3.0 ATX
CPU: Intel Pentium G870 Sandy Bridge Dual-Core 3.1GHz LGA 1155 65W BX80623G870
Memory: G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
Video: EVGA SuperClocked 02G-P4-2662-KR G-SYNC Support GeForce GTX 660 2GB 192-bit GDDR5 PCI Express 3.0 x16
PSU: CORSAIR CX series CX750 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS BRONZE
HDD: Seagate Barracuda ST1000DM003 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5"

I don't mind spending more money if it is actually worth it, but I'm not sure if I will notice a performance increase in games like CS:GO, Diablo III, SCII, WoW, etc. According to the hierarchy chart on here http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html, they are in the same category of performance. Any help would be appreciated!

EDIT: also I prefer not to overclock my CPUs, if possible.

 

[digitaldoc]

The i5 3570k is plenty of CPU, and will get some more mileage from your existing MB. It is not worth upgrading the MB just to get the 4690k at this point.

 

[Jeffmack30]

Not sure if you have anything against AMD platforms but for around the prce of just the CPU. You can get an FX 8320-E which has great OC if needed and you can get a great MOBO with it from MicroCenter at a decent price buncled. Your CPU your looking at will cost about 30 bucks less I believe then the decent bundle but not the capability the AMD is gonna give you. I would have went Intel myself but the power I wanted was in 300 dollar range just for the CPU and this is just my opinion so sorry if I was not any help. I just finished my build last week. And its been extremely clean and silent.

 

[digitaldoc]

http://cpuboss.com/cpus/Intel-Core-i5-3570K-vs-AMD-FX-8320

The FX8320 would be a downgrade from the 3570K at the stock speed.