Don't run that thing without a fan. Not a good idea. You must have air circulating around that heatsink or it does no good. I recommend the Vantec Tornado 92mm Fan. It pushes about 119cfm which is a lot of air for a 92mm fan. I have heard some say it is loud but others say it isnt. Even a regular 80mm fan would be fine. You can get them anywhere for around $10.