Did you ever upgrade to this processor: http://www.starmicro.net/detail.aspx?ID=121 ? I was reviewing this thread here: https://www.techspot.com/vb/topic96271.html I have the exact same motherboard (07E8h), in a Compaq Presario 6027us, so I'm thinking if it worked for you it will work for me perhaps. But my bus speed is 400mhz where as this processor is 533mhz, will that be compatible with my motherboard that you know of ? I don't know whether the bus speed is limited by the motherboard or depends on the processor. Thanks for any info!