DELL/3dfx Voodoo3 3000D
This board looks like a normal production board. Though I'm told it was an engineering sample and this can be confirmed because the card has an engineering-tag attached.
The tag says 'Q3 hung after 2783 16 hours'. I'm not sure what the 2783 means but the card was probably not stable enough to run Quake 3.
The card is a Dell Voodoo3 3000. It has a late production date so it's probably used internally at Dell.