The ultimate gaming 486 would have an EISA+VLB motherboard. EISA for SCSI caching controllers and 10/100 Ethernet cards, VLB for high end video cards, plus room for an ISA sound card.
The ultimate work 486 would probably be an IBM PS/2 Model 90 or 95 with exotic MCA cards. Or the same EISA + VLB as above with different cards.
To be honest I have a few different ultimate 486 setups so there isn't one ultimate to be had.
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