Pentium 4 2.4 temperatures

What are the "normal" operating temps for a P4 2.4ghz? I built a system
using an MSI 845 mb with the P4 and I'm getting readings in the bios of
50-54c with the case temperature at 35c. I've done some searching but the
results are mixed. Some say it's too high and others say it isn't. I
checked Intel's site and they only give ideal case temps which I'm a little
below. Is there a site or sites that deals with this issue specifically?

Thanks