Without some photos its hard to tell.

Cyrix made some upgrade processors for 386 boards that were actually called 486's, the clock doubled versions of which were the 486SRX or 486DRX.

As for fake cache, that was usually a problem with PC Chips boards, but they had a lot of aliases, I don't think Micronics was one of them. Most of those that I've seen ha 128KB or 256KB fake cache, and the chips have been soldered to the board (not socketed).

is it even possible to cpu-z something that old? hmm...

The socketed chip seems interesting, but without any pics of the chip or the socket itself, it's hard for us to tell.

TheMAN wrote:

is it even possible to cpu-z something that old? hmm...

I never had luck TSCing any 486. 🙁

I will see about unwrapping everything and getting some good pics of the socket and the chip. I'm not sure I want to break-off the heatsink though.

Any pic of the socket and the chip is good. Please include a pic of the board and the heatsinked CPU.

To bring this thread to a close. It is my mistake. My bad. I didn't really recall the size accurately. I took the system apart today, to remove the "threatening and ready-to-corrode" 3.6 Ni-Cd battery. While I had the cover off I compared the 486 chip on the motherboard with a genuine intel i486. They are indeed the same dimensions and ceramic color. I just hadn't committed the physical size to memory.

As far as the cache goes. I have the original documentation and will review the dip-switch settings and run appropriate benchmarks. I, too, have a feeling Micronics wouldn't screw around with fake cache parts.

leileilol wrote:

I never had luck TSCing any 486. 🙁

The DX4 Overdrive I have responds to CPU ID requests in Quarterdeck Manifest and Speedsys. It might work in CPU-Z.