I need a new motherboard for my HP Pavilion 552w but can't find one mainly because I don't know what to look for. It has Intel P4 2.0 GHz (Willamette, Northwood), 478 socket, 400 mhz fsb and ddr 266. I think it's a microATX form but not sure. Please help with a part NUMBER or a shove in the right direction. HP says its an Asus P4S333-M OEM. Thanx in advance for any help.If it is a standard ASUS model, it should work BUT a lot of major manufacturer's have proprietray parts, power comnnectors, specific power supplies etc. Check all the specs on the HP and ASUS web site. www.google.com is your friend.  HP won't SELL you the part or POINT you towards a HP parts distributor who would?  If not, you could buy any microATX board that will work with your processor / memory and has built in GRAPHICS and sound (or buy separates). At the very worst, you'd have to buy another power supply if the plug isn't right. If I remember correctly , HP uses a standard plug. Although, sometimes the power supply is physically smaller than normal (wouldn't matter).

Obviously, wouldn't be able to use your factory restore disk with a different motherboard. Would need a Windows full install disk and drivers for any remaining HP hardware (modem?) from the HP site. Finding an Asus P4S333-M somewhere would give you a better chance of a trouble-free installation using the factory restore disk, but no guarantee.