How many sites do you host?

I did a search on the forum bu it exploded so I thought I would post the question – sorry if it’s been asked.

I would like to know how many sites are commonly hosted on a dedicated server..

Say – 4 gigs of RAM, and a Q9300 (for example).

I know that some companies put 600 – 800 sites on the server and then customers talk about load and etc etc.. So, I just wanted to get a feel for how many sites/server..

regards,

Ryan