Pah... if that's a beginner overclock it must be getting way to easy. Have you considered a
TRUE? Bare in mind a TRUE is quite tall, about 16cm, so you need to make sure you case can take it. With a single fan like a
Noctua P12 you should be able to get 3.6 easy, with 2 in a push/pull arrangement you should be able to get 3.8. Note when I say these speeds I mean STABLE. You can push a CPU to 4.0 on a stock cooler, but that doesn't mean it will be stable under load.
If you get a TRUE don't forget some
Fan Clips and a
Bolt Through Kit.