Here's our current test system.

Our operating system was Windows Vista. For idle test we let the desktop idle for 5 minutes after start up and measured the CPU and for the max we ran Cinebench 10 on loop.

As we can see the Cooler Master does better than the stock cooler but as expected no where near as good as the higher-end coolers. This is going to make pricing crucially important in regards to this heatsink.