SMC SMC9432TX

Overview
"SMC 9432TX F001" is silkscreened on the back of this particular card.
 * "50-600734-001 REV A" and the SMC logo is silkscreened on the top of the card.

The Ethernet controller in use is an SMC [offshoot of Standard Microsystems Corp (??), Accton acquired majority stake from them in 1997] 83C171A2QF P (83C171, later sold as the SMSC [Standard Microsystems Corp] LAN83C171 [EPIC/XF]).
 * An additional (and presumably older) revision uses 83C170.