E-6600 on box cooling?

[Kondoom]

Is it posseple to run 3.0 ghz with a E-6600 boxcooler on?
i just almost did it.
i used the ASUS AI overclock, and Ntune to fix the memory.
now i ask, can anyone help me getting over the magic number 3000 Mhz with a box cooler.

System:
Motherboard. ASUS p5nSLI
Memory. No clue.. Sorry. (look at attachments, maby you can tell me.)
CPU. Core 2 duo E-6600
CPU cooling. BOX
Other cooling. 1x 100x100 mm fan near the CPU to pull out hot air.
PSU. Dunno, too tired to chek, but ill check tomorrow.
GFX. Gforce 7900GTX a little clocked, standard 650mhz

i have runned a stress test/benchmark and it was stabil for thoes 20 mins. and played MFS:MW for 2 hours after and no probs. (know its a old game, but i havent got time to get a desent on.. yet)
the resulution on attachmests is pretty bad, but my monitor is best at that setting, and had to compress a lot to get below 200 kbs.

hope to hear suggestions soon, and hopefully links to better OC programs.

Regards.
Me!