Ninjalane has posted their review of the super silent i5 cooler from Thermaltake called the Silent 1156. A quote from the article:

Our heatsink tests are designed to look at cooling capacity at two different heat levels. The difference between the two determines how well a cooler can handle the different heat loads. The ThermalTake Silent 1156 did an excellent job in our tests by easily outperforming the stock 1156 cooler and proving it could handle a minor overclock up to 3.2Ghz.

>> Thermaltake Silent 1156 Heatsink Review