Actually, on that one the sticker was changed.
Take a look at the pic of my gf2mx and the pic of that voodoo4mx, the fans are different.
3dfx used 3pin fans, nvidia used 2pin upto the geforce4 i think.
and the heatsink on that v4, matches the one on my gf2mx perfectly.
the only thing different is the sticker.
EDITDon't you just love photoshop?

It's very clear that it's a fake card. note the marked area and the distance on the sticker. [both highlighted]
mate, i think you have some asses to kick