The following table lists the specifications of the ThinkPad X21 computer system:
| Feature |
Description |
| Processor |
- Intel mobile Pentium 700MHz, L2 256 KB cache
- Intel mobile Pentium 600MHz, L2 256 KB cache
- Intel Celeron processor 500MHz, L2 128 KB cache
|
| Bus architecture |
PCI Bus |
| Memory (standard) |
64 MB or 128 MB depending on model |
| Memory (optional) |
64 MB, 128 MB, or 256 MB SDRAM card (maximum of 384 MB) |
| CMOS RAM |
114 bytes +4 Kbytes |
Display
|
- 12.1-inch, 16M colors SVGA (800600 resolution) TFT color LCD
- 12.1-inch, 16M colors XGA (1024768 resolution) TFT color LCD
|
Hard-disk drive
|
|
| I/O port |
- USB
- RJ11
- RJ45
- VGA
- Mic
- Line-in
- Headphone
- Docking
|
| Internal modem |
V.90 D/F |
| Audio |
CS4281/CS4279A Mono Speaker
|
| PC Card |
T2, Cardbus |
| AC adapter |
72W AC/DC |
|
