The i7-3930K is part of the lga2011 Sandy Bridge-E high end processors. It does not come with a stock cooler. Also, it's far from being a cheap processor so I don't know why you are trying to cheap out on a cooler for it. If cost is that big an issue you should have gone for one on the lga1155 Sandy/Ivy Bridge platform. These are much cheaper, come with stock coolers and are just as potent for gaming.
I already bought it ,
which cooling system component is recommended which is not water cooling?