I bought a bulk lot recently and included in it was a surprising find, a sawtooth running this card. It was in a custom case, with a processor upgrade, so I tried it in a couple other older 2x AGP G4s and it worked in them too. I'm fairly sure it's a PC card, but I can't find any info on how it's working/how it was flashed/etc. I'm doubly amazed because I noticed after I switched it around a couple times that the metal on the pins has a couple places that are flaking a little. I'm afraid to remove it from the machine it's in now again if it's falling apart, because it works flawlessly. it's PN8915-981, for reference. I picked up another one for cheap and want to do the same thing to it (if I can find info on what the heck that is).
Any insight appreciated!