pentium ii, 400mhz, 128mb - ati rage ii pro gfx card (was a killer at the time), 17in crt, cd-rw, dvd-drive (with some hollywood pci card to play dvds :S),..
was custom made late '97 by a relative - i felt i could nuke the world in the days!!!
edit: i still have this pc running xp - used for internet access only, tweaked to the bone, still slow though..
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oh, i had an amiga 500 yearrrs ago if that counts