486 sx 33 mhz with 4mb of ram and 125 Mb HD... my first and last intel i owned...

Bought in 1990

Genuine IBM (not sure the model number)
CPU: 12.5 Mhz Intel 80286
RAM: 4 MiB
HDD: 40 MiB
GPU: Hercules VGA (can't remember exact details, but man did it cost me extra to not just have EGA).
Sound: PC Speaker

The first computer that was mine instead of the family's was a 486 laptop with a broken screen (that I plugged a monitor into and used it's kb and trackpad) but I can't remember it's specs. Was what I could afford. It managed to barely play the PC port of Street Fighter 2, and some other DOS games. Got that in 1995 by saving lots of allowance and begging my Dad to help after seeing someone put it in the classifieds.

I also had a VIC-20 but I got it used well after the 286 (in fact, I think the family actually bought a 386 before it).

I think my first was an Amstrad CPC 464 from the 80s. It was passed down to me from my cousins and was programmed in Basic. To run a program you had to load it in a tape drive, lol.

My first Windows PC was quite a bit after (1996):

P166 (w/ MMX! :D), 16Mb RAM (which I remember upgrading to 48 when AOE2 came out), 2Gb HDD and 20X CD-ROM, 15" monitor and Windows 95. I remember it managed to run Half-Life, Tomb Raider 1-3 and AOE 1 & 2, so I was fairly happy with it for a while, lol.

My first machine? That was a IBM-Compatible 286, I think it was 33 MHZ if you pressed the "turbo" button"
I think it had 8 MB Ram, a 5.25" floppy disk drive, and a small HD, cant remember the size offhand. I had a SoundBlaster (the original!) card in there for audio. My first PC game was Wing Commander.

First computer, the (quite crappy) expansion for Intellivision.
First true computer: ZX Spectrum
First x86 PC: AMD K6-166, 32MB RAM, 3GB HDD, 16x CD-ROM

Back in 98, I think:

AMD K6 300 MHz
32 MB RAM, upgraded later to 128 MB
2 GB HDD, upgraded later to 10 GB
32x CD-ROM
Floppy disk drive
Windows 98
I bought a 32 MB Voodoo video card to play Diablo II. Good times.

First Computer was a ZX Spectrum powered by the now famous Zilog Z80 Processor @ 3.5 MHz (1984)

First PC was a Intel 486Sx 33 Mhz, 20 MB HDD, 4 MB Memory with SVGA. It cost over a 1200 USD back in the day (1994)

Pentium 75MHz, 16 MB RAM, Windows 95, 2 GB Hard Drive. No CD-ROM

I had the same computer, except I had the 20MB hard drive with it.

Atari 800XL- some cracking games on that, many of which I've since replayed on an emulator.

My first PC had a Cyrix 166MHz processor and an uber-1337 S3 Trio graphics card which used to practically melt during big battles on Dungeon Keeper.