I have had this cpu laying around for a while somehow it got bent pins at one time i bent them all back perfect and tested it in the only board i have here for 478 board is a 915 chipset that only supports up to 2.2ghz cpus. But in that board the cpu does post and you can go into bios. Back when i had a 478 system it did work i got it from a friend he worked at a pc shop and it was left and no one claimed it. I took some pics camera aint very good their about as good as i could get them. Checked ebay and this rare cpu goes for 150 or more on most auctions Will give as much info as requested.