I am going to buy an i7 3770k and don't really have the money to get an aftermarket heatsink so I am wondering would the stock heatsink be alright? I would be gaming and video editing. What would the temps be.
The stock heatsink will keep it cool, as long as you dont overclock. You should get around 45-50C at loads, maybe 55C. Later on you can get an aftermarket cooler like the hyper 212 evo, but until then the stock cooler works fine.