Saved this bad boy recently, like a month ago. It was on the brink of being scrapped, but I hopped in and said no. Originally I thought it was a 486 with no turbo button, however, it turned out to be a Pentium MMX machine. Exhaustive specs list later on. (keep in mind I am new here and I don't know exactly what exhaustive means, if you want to know something else, just write a comment) A few things didn't work when I got it, like a Hitachi 4x cd drive that was in there, and the floppy drive. It also had no sound card, I put in an ESS 1868f that I've had for as long as I've been alive. The original hard drive was taken out because it had some stuff on it, and I put 2 4.7gb Maxtor drives which whirr like crazy but it's enough space for me. I also put in there a sony drive from 2002 (cdu5221). It had a 1mb s3 trio64 which I upgraded to a 4mb s3 ViRGE DX. Other hardware additions will be surprises down below in the hardware list.
Hardware List
CPU: Pentium MMX 166 (no overclock)
Graphics card: S3 ViRGE DX 4mb
RAM: 32mb EDO (voltage unknown since it autodetects)
Motherboard: OEM DTK PAM-00561 E-2
HDD: 2 x 4.7gb IDE Maxtor
CDD: Sony CDU5221
FDD: Generic Panasonic Floppy Drive
Sound Card: ESS Plug&Pray AudioDrive ES1868F
FM Tuner: MediaForte SF16_FMR2 ISA
Networking Card: Generic RTL8029AS based Ethernet card
Power Supply: DTK AT 300w
Peripherals
Mouse: Genius 3 Button Serial Mouse
Keyboard: Jerry rigged Acer ps/2 keyboard made to work with the AT interface
Monitor: LG 24MP48HQ-P (same one that I use with my modern rig, has an option to not stretch 4:3 and 5:4)
Speakers: Logitech Z533 (again the same ones that I use with my modern pc because this pc sits right next to my modern one)