This motherboard is in the HP Pavilion 6545C and other Celeron HP Pavilions from around 1998 -- MOBO is also known as HAWK. http://h10025.www1.hp.com/ewfrf/wc/document?product=61091&lc=en&cc=us&dlc=&docname=bph05191

There are 2 revision of this motherboard. The first rev was defective and HP replaced mine in 1999. I think the non-defective motherboard rev is 2.04, 1.04 is the defective mobo rev.

This motherboard supports up to a 533Mhz PPGA Celeron. I have used a powerleap neo adapter to put a 1GHz FCPGA Celeron on it. The processor will eventually burn up due to overvoltage. The will neo need to have the the LED cut off to clear a capacitor. There is also a jumper to change the FSB from 66MHz to 100MHz for the FCPGA celeron --- this upgrade is not worth the money

This motherboard has limit graphics upgradability since there is no AGP slot and there is no option to disable onboard video in BIOS. I have used a Radeon 32MB SDR video card and a Verto GeForce4 MX 4000 64 MB DDR PCI with this board. When the new video card is installed, booting fails the first time and beeps --- almost like the BIOS detects both video cards then disables the onboard video for you. The second boot succeeds.

This motherboard has run RH8, RH9, Fedora Core 1, and Fedora Core 2. The PCI audio and winmodem are not supported -- although there are experiment proprietary linux drivers out there for conexant riptide. HP says that the maximum amount of RAM the board will accept is 256, they are wrong I have been running 512MB of Crucial PC133 in it for the last 4 years. I tried a LSI megaRAID SATA-2 card with this board -- it failed miserably --- mobo PCI rev is 2.1 and SATA card was PCI 2.2