Wake on LAN for Optiplex GX50

So I recently got an Optiplex GX50 and I'm trying to get Wake on LAN working but so far not much luck. I enabled it in the BIOS but no response to magic packets. I read that the 3com NIC's need new drivers installed before they can use WOL. But I can't find the drivers. According to the Product Specification I found on dell.com the GX50 has a 3com 3C920 NIC, but there's no such card to be found on the 3com site and I can't find drivers for it on the Dell site either.

Anyone have any suggestions?