HP DL380 G5 2.4Ghz Can I add a additional 3Ghz CPU?

Hi,

I have a DL380 G5 with a single 2.4Ghz CPU. Now I want to add a other CPU. Is it possible to add a second, faster CPU 3Ghz?

First CPU 2.4 Ghz, Second 3.0Ghz, I do have the second cpu power regulator board.

Thanks!