A 1993 era 486 DX-33 would have likely been an upper mid-level machine with the Pentium being cutting edge, 486 DX2-66 being the leading edge, and 386 being bargain basement model.
CASE: mini or mid-tower case, or AT desktop, or LPX. Beige, maybe a digital readout. Steelcase, Kingspao, Magitronic, and Aopen seemed popular.
PSU: 150-250 Watt baby AT style, still hard on/off
MOBO: all ISA or early socket 2/3 VLB boards with a 9 chip L2 cache and reliance on external cards for even basic functions unless an OEM LPX system
RAM: eight 30 pin SIMMS, four 30 pin and two 72 pin, or four 72 pin SIMMS max. Memory ceiling ranges 32-64MB for the period with 4MB being the low end of RAM and 16 being Top Shelf material.
CPU: Intel 80486 DX-33 of course. The SX was somewhat common on lower end OEM boxes, and DX2 was high end.
FDD: 1X 1.44MB 3.5" floppy was the standard, though a lot of clones came with a 1.2MB 5.25" as well.
HDD:. 80MB to 528MB, with the majority hovering around 200-250 MB by this time. IDE of course, VLB controller on a higher end VLB motherboard.
CD-ROM:. Sony, Matsushita, or SCSI. 1x and 2x being common speeds, but these were only.on higher end $2000+ "multimedia" boxes usually, often using a soundcard provided controller.
GFX: VGA was the bare minimum, with the WD PVGA1a chipset being common ISA option. SVGA was usually WD, Cirrus Logic, with the notable ones on the high end being Number 9, Mediavision ProGraphics, TSENG labs ET series, and S3 for SVGA. SVGA vram ran from 512K to 1MB on the average, and the usual Windows desktop was 640x480 at 16 colors or 256 colors.
AUDIO:. Most systems still shipped internal speaker only it seems. The SoundBlaster Pro2 seems to be the most popular SoundBlaster of the era with the AWE42 being super high end and the SD16 being the ubiqutious upper mid-range cars. Pro Audio Spectrum and Covox soyndmaster were also options though not as popular.
NET: most people had 14.4k dial-up via an internal or external modem at the time, if they even had internet at all. Networking was mostly IBM token ring Or Novell Netware IPX/SPX type stuff. Most people did not have networking or internet though back then, and internet was just newsgroups, bulletin boards, and online services to most people, like AOL, CompuServe, Mindspring, or Knowlogy.
O/S: MS-DOS 6.21 was the latest, with some still using 6.0 or 5.0. seems to me 6.22 and 5.00 were the most popular 486 era DOS versions. Windows 3.1 was growing in popularity, 3.11 turning up later in the year. Only businesses and schools used "For Workgroups" due to LAN support. OS/2 2.x was also an option. I actually have IBM OS/2 2.1 with Win OS/2 which let you run Windows apps from inside OS/2...it's from 1993 but never caught on.
However, there are 2 caveats here.....
First is getting 100% 1993 kosher hardware can be tricky as it's at the tail end of the dying breed of 486 based PCs.....it's that period right was we went from calling them "IBM compatible" to calling them "(Wintel) PCs". The lower end stuff was dismissed as slow junk and the cutying edge is buggy, so the mid-market tends to be best.
Also, as a hardcore retro user myself, I do find the historically accurate machines annoying at times, usually due to slow CD drives, Hard Disk bottlenecks, graphics RAM that's not maxxed out, or low Memory Capacity. Typically I do go out of the era for the following for a better experience....
- use a modern DVD drive, they are plentiful, work in DOS just fine, and make it feel more like a HDD when running games that require a CD.
- USE an 8GB EIDE, DOM, CF Card, or even a modern SSD with a SATA converter. Running inPIO 4 on a 486 DOS box on a VLB or PCI or EIDA controller is pure joy, almost no wait unless it's something bordering out of scope for the generation...like Quake.
Beef up the VRAM if possible. I learned this when playing a LAN match of Doom with my wife last weekend. She was on the NEC Ready Pentium with 1MB Alliance PCI graphics, I was on the 486 DX4 with an S3 805 VLB with 2MB....side by side, that 486 was eating the Pentium for breakfast in the video Dept (way better frame rate....though unnoticeable unless side by side). Just goes to show how much RAM helps in any case.
Also, having LAN and Internet helps as well since getting data on and off these old things is tedious and time consuming even with a fast DVD-ROM drive. For my 486s I either xfer data via USB HDD adapter or LAN it over overnight using Windows For Workgroups. .....ie...486 pulling 1GB of DOS games to a 2.1 GB FAT-16 partition while I sleep. Plus with multiple partitions, reformat and reinstall is a breeze with all the drivers, Windows files, add-ons, and only having to rebuild what was on C: if things go badly awry.
My DOS Boxen
85' Tandy 1000(a)- 8088/4.77, 640K, 8gb XT-IDE, TGA, 3-voice
89' GEM 286 - 286/12 w/287, 6MB, 1GB SCSI, 2XCD-ROM, ET-4000 1MB, SB Pro2
Creeping Net 486 - 486DX4100 WB, 128MB, 512K L2, 15GB+40GB, S3 809 2MB VLB SVGA, SBAWE64