It could be the IMC but overclocking to 4000MHz takes a lot of skill. I'm thinking it's possible to achieve the frequency. Try asking users in the Overclocking/Tweaking forum.
Ok, so not everyone is enlightened as you in overclocking random access memory. Help out the guy rather then showing off.
Your reply is laughable at best.
Hey, I am not here to start a pissing match. Nor do I feel the need to explain my PC skills/experience to some forum troll. I offered the guy some suggestions as to where to start. Please tell me how I was 'showing off'.
You obviously have little knowledge of OC'ing. Otherwise, your reply would have reflected something constructive. Furthermore, you would know overclocking memory isnt a picnic. Overclocking memory is far more extensive than just bumping a CPU multiplier and voltage and calling yourself a pro. Extensive enough I am not going to sit here and write a story.
There are some very good guides in this forum and on others that explain in detail. Far more comprehensive than I could ever get. Oh wait, did I just admit I dont know it all? Go figure.
Have a nice day Troll.