While water cooling has been especially popular over the last few years, there are still a lot of people who would prefer to not deal with the additional risks and installation complication. On top of that, when you are looking for really high end cooling it actually costs a lot more than you think to go water cooling. This is where companies like Noctua come in. You see cheap water cooling doesn't always compete with air cooling, especially when it comes to noise. So Noctua continues to innovate in the air cooling market. Their top dog is called the NH-D15. Well they sent one out a while back and being the slackers that we are it ended up pushed back. Today I will finally have the chance to check out their biggest and best to see just how it compares to the completion both on the air and water cooling sides.