I'm gonna try and do some benchmarks by the end of the week.
Please (everybody) post what benchmarks you'd like me to run on this thing, from PHIL's DOS Benchmark Pack.

For the ISA VGA card, I'm thinking I'll use the 1MB TSENG Labs 4000*something* , that I have lying around.

It sounds like it might be MR BIOS.

Yes, I think it might be.. as I vaguely remember that being written somewhere.
I will confirm when I benchmark this thing later this week.

Also, is there any point banchmarking with different video cards?
I also have some decent VLB ones, like the S3 805, and the Cirrus Logic 5428

L.E.
On second thought, I think i'll stick to the Tseng Labs.
The others haven't been tested yet, and I wouldn't want to fry this system if there's something catastrophically wrong with them.

That's the first I've seen of an IBM BL3 on a PGA-168 interposer board. I would be very hesitant to use this interposer on any other motherboard.

feipoa wrote on 2020-11-02, 21:37:

That's the first I've seen of an IBM BL3 on a PGA-168 interposer board. I would be very hesitant to this interposer on any other motherboard.

The MoBo manufacturer name is also written on the interposer board.. So you could be right.

When switching between the BL and standard 486, do any jumpers have to be changed on the motherboard?

Nice find. Do you have another Socket 3 board to test, whether it needs exactly this motherboard?

Anonymous Coward wrote on 2020-11-03, 06:19:

When switching between the BL and standard 486, do any jumpers have to be changed on the motherboard?

I have no idea. I bought the computer complete in it's case. Booted up straight away.

GL1zdA wrote on 2020-11-03, 06:50:

Nice find. Do you have another Socket 3 board to test, whether it needs exactly this motherboard?

I'm a bit scared as to not damage anything if not compatible.. but I do have about 10 different Socket 3 boards. Of which I've got around to test only 2 (not counting this one) :

AQUARIUS SYSTEMS, INC.
MB-4DUVC MODEL 1
https://stason.org/TULARC/pc/motherboards/A/A … VC-MODEL-1.html

and

Epox or Pronix
GXA486SPM
Looks like this:

Very interesting!