Quiet CPU coolers for OCing
I had a 212 Evo before, and the Noctua was a nice upgrade.
The Noctua NH-D15 is the only Noctua fan I've had, so I don't know how it compares to earlier Noctua fans. But, I use it with the low-power extension rails that are provided with the NH-D15, and it keeps my overclocked i7 2600K @ 1.416v under 62C while benchmarking in Prime 95, and is not very loud at all. While gaming, it's even quieter.
Without the low-power rail extensions, the NH-D15 will cool a CPU more for bettering OCing, but it will also be a bit louder. How much, I don't know, because I've only used my NH-D15 in the low-power configuration. With the low-power cables, the NH-D15 gives me lower temps than the 212 Evo, and is also a bit quieter than the 212 Evo.
