Dell OptiPlex G1 - Manual (Page 95)

Ports
Externally accessible:
Serial (DTE) two 9-pin connectors (16550-compatible)
Parallel 25-hole connector (bidirectional)
Video 15-hole connector
NIC RJ45 connector
PS/2-style keyboard 6-pin mini-DIN
PS/2-compatible mouse 6-pin mini-DIN
USB two USB-compliant connectors
Internally accessible:
Primary EIDE hard-disk drive 40-pin connector on PCI local bus
Secondary EIDE hard-disk drive 40-pin connector on PCI local bus
Diskette drive 34-pin connector
ATI Multimedia Channel (AMC) 40-pin connector
Video
Video type integrated ATI Rage IIC
(baseline AGP) graphics
Video memory 2 MB standard (upgradable to 4 MB) SGRAM
Supported Resolutions
Video Resolution Maximum Color Depth Maximum Refresh Rate Minimum SGRAM
Required
640 x 480 True-color (32 bpp) 85 Hz 2 MB
800 x 600 True-color (32 bpp) 85 Hz 2 MB
1024 x 768 65,536 colors (16 bpp) 85 Hz 2 MB
1280 x 1024 256 (8 bpp) 85 Hz 2 MB
1024 x 768 True-color (32 bpp) 85 Hz 4 MB
1280 x 1024 65,536 colors (16 bpp) 85 Hz 4 MB
1600 x 1200 65,536 colors (16 bpp) 75 Hz 4 MB
Power
DC power supply:
Wattage low-profile chassis: 145 W;
midsize chassis: 200 W;
mini tower chassis: 200 W
Voltage 90 to 135 V at 60 Hz;
180 to 265 V at 50 Hz