retrotechtive
New arrival, a cache card for the #Macintosh #IIci - and even from this quick photo it looks like those capacitors have leaked and corrosion has begun across the board. Hopefully salvageable.
Sep 29, 2023 at 3:17pmWeb
Show threadretrotechtiveSep 29, 2023

Eep!

Let's hope I don't destroy a pad removing these... (If they're not gone already)

Show threadretrotechtiveSep 29, 2023
Carefully clipped this cap off and the signs underneath are not great. It can clearly be seen where some of the traces are starting to corrode as well. I will attempt a removal and replacement, might need some glass fiber scrubbing too.
Show threadretrotechtiveSep 29, 2023
So not great but I do think this is fixable. The whole board needs an isopropyl alcohol wash first though, the cap juice has spread far and wide.
Show threadretrotechtiveSep 29, 2023
Cleaned, caps replaced and in the machine...
Show threadretrotechtiveSep 29, 2023

Good sign 😎

I don't have anything to test the speed on here yet so might be a while before I can see if it's making any difference. But no instant death at least.

Show threadretrotechtiveSep 30, 2023

Admittedly the default Power Mac measurement puts the results in an unflattering light, but there is indeed a clear difference between the cache being present and not, using MacBench 4.0.

I did multiple runs and the results were consistent for each scenario.

The cache card must be working then! 😎

Show threadretrotechtiveSep 30, 2023
Incidentally, that default Power Mac 6100/60 has nothing to be smug about - here is the same test compared against it, running on the Power Mac G4 😁
Show threadretrotechtiveSep 30, 2023
Much clearer comparison, current machine without cache (top result).