I was given a dated compaq presario 4505. Motherboard is a PWA Sniper Motherboard with an Intel VX chipset. The mobo has 16MB on the board and one 168 pin DIMM slot that will hold PC66 memeory. According to FAQ #30 on www.wimbios.com the Intel VX chipset will not handle anything above 32MB dimm. Upgrading the BIOS will not solve my problem. At this point I'm considering replacing the mobo but need to know how to determine the current boards form factor.

do u plan on making that a major upgrade? new mobo,memory,cpu,etc there's micro-atx and there's atx form factors, you will also need a new case and power supply you'll need a mid tower case for either form factor or a micro atx case for the micro-atx motherboard

Micro ATX is 9.6 x 9.6 inches ATX is 9.6 x 12 inches "you will also need a new case and power supply you'll need a mid tower case for either form factor or a micro atx case for the micro-atx motherboard" That's true...I don't think you can use the Compaq stuff.

That may even be an old AT board...is the keyboard connector large or small? Are there several connectors built onto the back of the motherboard (mouse, printer, serial ports, etc), or are they attached to the case & connected to board with cables?

I don't believe it, I can't find anything useable one the HP site ore anywhere. I think you have a AT board because it's socket7 and you wrote about a pentium. The main difference is that the ATX board has all connections build into the board while at the AT board only the keyboard plug is on the board while the other connectors can be plugged on and are screwed to the case in the slots like pci and isa cards. The problem is you can't fit a ATX board properly into an AT case because you need the special opening for the ATX backside connectors! Here a typical AT board (the keyboard connector is the little white thing in the lower right corner): http://www.unisia.com/images/product/motherboard/socket7/p5vxb.jpg And here a normal ATX board with the connectors on the board (upper side - the pink and yellow thing and the grey ones left and right of them!) http://images-eu.amazon.com/images/P/B00009Y358.02.LZZZZZZZ.jpg If you need more goto google image search and search for "AT mainboard" and "ATX mainboard" BTW: I put a ATX board in an AT big tower a few weeks ago because I go an old one together with cpu and ram for free. I had to saw a lot out of the backside, make a couple of new holes to screw the board on the backside (half didn't fit) and it's really not a very good fit as the whole thing is now very open at the backside so dirt and other nasty things may get in. I use it for my nephew to play on it and didn't want to buy a new case for that 750MHz Athlon while I had the empty AT big tower lying around. It's also a pain to get the plug on the backpanel as it's too far inside!