Dell Dimension DMC Owner's Manual page 80

Memory
Architecture
Memory connectors
Memory capacities
Minimum memory
Maximum memory
Memory type
Drives
Externally accessible
Internally accessible
Ports and Connectors
Externally accessible:
Serial
Parallel
Video
Keyboard
Mouse
USB
Network
Audio
Headphone
80
Appendix
Dual Channel DDR SDRAM
Four
128-, 256-, 512-MB or 1-GB
128-MB DDR SDRAM
NOTE:
Between 32 and 64 MB of system memory may be
allocated to support graphics, depending on system memory size
and other factors.
4 GB
PC2700 (333-MHz) or PC3200 (400-MHz) DDR SDRAM
(non-ECC)
two 5.25-inch bays
one 3.5-inch bay
Two bays for 1-inch–high IDE hard drives
9-pin connector; 16550C-compatible
25-hole connector (bidirectional)
15-hole connector
6-pin mini-DIN connector
6-pin mini-DIN connector
two front-panel and six back-panel USB 2.0–compliant
connectors
RJ-45 connector
Five back miniature connectors for line-in, line-out,
microphone, surround and center/Low-Frequency Effects
(LFE) channel
one front miniature connector for line-out