I am building a gaming pc.
Processor is I5 3570k
Geforce 660 superclocked graphic card 2GB
2x120 fans in front ,1x120 fan back,1x120 fan on top of the cpu case.
Is liguid cooling is required or air cooling is just enough for these kind of pc's....
If you aren't overclocking the CPU, then no, you don't even necessarily need a good air cooler, since the stock cooler will be fine for stock temps. If you are overclocking the CPU, then you need a good cooler, whether it's air or water.