1) From the specs it appears to be an i810 board, "optional" video memory on celeron means "none" most likely.
Integrated video on 100MHz bus, slow. Celeron 800 is likely upgradable to 1.1GHz, but that's just the technological limit, in reality this is a SFF box with limited power, you do NOT want to try to squeeze more performance/heat/power out of it, that defeats the whole purpose.
Yes these will run XP, will those of you who have NO IDEA, please just refrain from guessing. Guessing like that is only a disservice to everyone else.
Like any system, the newest drivers should be used, not circa-'99.
This system is larger than it looks in the Surplus computers spec, as well as the HP drawing. Methinks they conceptualized it by putting it next to a very large monitor. IN fact, the IBM Netvistas are thinner and without the clumsy Compaq parts arrangement once you consider that the only really small part is the thin top, and it's pointless to have a thin top if the base is wider than the top, unless you're trying to make it look like a cable modem on steriods.
Anyway,
here's a pic that better shows scale.
As for ideas about "little server", it's not going to use any less power than some other setup with integrated video. It's crippled by it's 100Mb lan too. Can a GbE card be thrown in? I wouldn't count on it, but maybe since some of the newer breed are pretty shallow.
So rightabout now it seems I'm pretty down on this box. It's ok, just be aware of what you're getting, a box not as small as it seems and pretty slow and limited. Further, chassis cooling did not have to accomodate today's hotter-running drives during that era. NOthing worse than a fileserver that becomes an ez-bake oven for a 400GB HDD. Many of you would likelyl be as well off getting a NAS instead, but that's just my opinion.