Tyan Computer GX21 - Manual (Page 15)

1.5 About the Product
Chapter 1: Overview 7
1.5.2 Rear View
Ventilation fan
ATX 12V 300W PSU
Stacked PS/2 mouse/keyboard ports
RJ-45 LAN ports
Power switch
VGA port
Serial port
(COM1)
RJ-45 LAN ports
Expansion slot
USB Ports