I was just given a Pentium III-450MHZ processor I need to know what type of Motherboard would be compatible with it.  I have an ASUS CUV4x board with one of those, though mine's an 800... Check with ASUS Technologies for specifics.

Also try browsing the older MB offerings from Gigabyte, ABit, and IWill.

You may find one of these chips at a computer fleamarket, swap show, or 'recycling'/refurbishing SHOP. Or you can try a Web based SELLER of used PC parts, like PriceWatch.MarvtheMan....Your P3 450 processor is a slot 1 ....I think. A good motherboard for you would be a
ASUS  P3B-F   slot 1 ..... it will handle up to a 800 processor,  and fits a atx case ...
it has .....1 AGP slot
              6 PCI slots
              1 ISA slot
2 ONBOARD USB ports
mouse and keyboard
serial and parallel ports
It will support up to 1 GB of 168 pin SD ram ( 4 slots) either PC100 or PC133 work in it just fine.
I picked one up on Ebay several months ago.
Check the Asus site in the archives for slot 1 boards and then go E baying.

Cheers,
dl65