Invisible wrote:

> I have in front of my an S3 Trio3D/2X graphics card.

Actually, I have three of them. And you know what? They're all slightly 
different...

If I compare any pair of boards, there is a difference. So it's not like 
one board is different to the other two, they're ALL different!

- Boards B and C have two RAM chips on them. Board A has bays for two 
chips, but only one is present. (All three boards are spec'd as "4 MB".)

- Board B has a different brand of RAM chip. (But *all* the boards have 
different *models* of RAM chip.)

- Boards A and C have pins on the AGP connector which aren't connected 
to anything. But on board B, those pins are physically missing rather 
than just unconnected.

- Board B has less writing printed on it between the two RAM chips. The 
actual components mounted there appear identical, but just fewer markings.

- Each board has some kind of 3-pin component with what looks like a 
heat sink soldered to a very large metal pad on the board. Oddly, only 
two of the three pins are connected to anything; the middle pin is cut 
off at the base. On boards A and C, there are three metal pads on the 
board that end in rounded tips, and the middle one appears to be a 
continuation of the large pad the heat sink is soldered to. But on board 
B, there is a gap between the pads the pins are soldered to and the 
circles at the end, and there is no middle pad (but the circle is still 
there).

- Some of the code numbers on both the S3 chip and the Holtek chip are 
different on each board, while others are identical. (I'm guessing these 
are serial numbers, or at least revision numbers.)

- Hello, I didn't notice this: Board B says "SP368G REV:2" on it, while 
the other two boards say "SP368G REV:3" on them.

So there we are. *Clearly* I have too much free time...

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