[Himo5]

That would be the 8-bit CPU the Z80

What I liked about the Z80 was the way you could make up your own instructions for it and apply them to the low and high bytes of the IX/IY registers.

 

[John117-]

9900KS will be remember <3

 

[Deepcuts]

My 1st 486 DX at 33 Mhz.
Just because it allowed me to play Prince of Persia, Doom and Heretic.
It had a grand total of 4 MB of RAM! Good times.

 

[TheBDK]

The AMD Thunderbird. All you had to do to enable overclocking, was to use a pen and draw a line on the weirdly designed top pcb bit. It was now unlocked. That was the most fun cpu that I have ever overclocked. It ran hot like the devil, but it also allowed me to play a game AND listen to music in Winamp at the same time. Glorious!