depend, i5-3350P have slower clock. but more core. What are you using it for? better off with a i5-3550 or better
It's in a mini-itx case with no room for anything but a stock cooler. Also the SFX form factor power supply is limited to 450 watts. It doesn't come in any higher than that so I'm thinking overclocking is not an option.
I'm using it to play MMOs and Rome II mostly.