Yep, a 4400 doesn't work as well with DDR2, whch is why a 4600 is a better choice...(but a 3800 is OK albeit slightly slower)....these work on the 400 multiple rule, whereas the others don't. DDR2 800 works fine.

The 5000 is the truck that hits the guy in front.

What surprises me is that Dell didn't spot this earlier (or did they?) Still....I found out the hard way there....Intel Pentium D 950 based system caught fire (standard case and fans, I guess).

I haven't seen a 950 on the website for some time....wonder why?

Al.