Shoutbox

First:

MSX 1

    * Processor: Zilog Z80A running at 3.58 MHz
    * ROM: 32 kB
          o BIOS (16 kB)
          o MSX BASIC V1.0 (16 kB)
    * RAM: 8 kB minimum, up to 64 kB
    * Video Display Processor: Texas Instruments TMS9918 family
          o Video RAM: 16 kB
          o Text modes: 40 x 24 and 32 x 24
          o Resolution: 256 x 192 (16 colours)
          o Sprites: 32, 1 colour, max 4 per horizontal line
    * Sound chip: General Instruments AY-3-8910 (PSG)
          o 3 channels + noise

Second:
Intel Pentium 1, 90 Mhz
4 GB hard drive

Third:
Intel Pentium 3, 400 Mhz
9 GB hard drive
64 MB RAM (upgraded to 192 MB)
8 MB s3 videocard

Fourth & current:
Intel Pentium 4 HT, 3 Ghz
240 GB hard drive
512 MB RAM (upgraded to 1 GB)
128 MB aTI radeon 9600 pro

EDIT: found the MSX specs