i7-3770 i7-3770s

Hi, I am able to buy 2nd CPUs 3rd Generation type: Ivy Bridge. But I cannot decide which one to buy. Intel i7-3770 TDP = 77 Watts vs 3770s TDP = 65 Watts Although electricity is not very expensive to generate at my place. Comparing the two CPUs in terms of price, there is a $30 dollars price...