Overclock HC on internal memory

[seegee]

Hey. I have been looking but I cant seem to find the answer to this. So i have HC preview v4 installed on my Nook Color. Everything is working great but I would like it to be a little faster so i want to overclock it. I have installed Set Cpu on my Nook and set that to 1100mhz min- 1100ghz max but it seems that its not any faster. I watch videoes of people on YouTube who have HC on there nook with no lag at all. Can you help?

Thanks