A good few years back, I bought a Powerlogix Pismo 900Mhz G3 upgrade CPU daughtercard. The seller was parting out a dead Pismo and offered DOA warranty if the parts received didn't work, as he wasn't sure what was dysfunctional. The upgrade card I received didn't show any life, I'd read about them overheating, and he gave me a refund and said to chuck the dead part.
It was put in a drawer and forgotten about. I came across it today, looked it over and noticed some parts of the board were covered in heatsink paste, which I removed. Threw it in my Pismo as a laugh, with a heatsink on top, it booted up without issue! I'll try to rebuild the Pismo now.
The cooling for this upgrade is complete rubbish - it comes with a thin piece of copper that you seemingly put in place of the small L-shaped heatsink, and is simply not enough. It is a 1000Mhz CPU, downclocked to 900Mhz - due to overheating concerns. I'm hoping that if this CPU continues to work, I'll rig up a small fan and custom heatsink inside the Pismo. Interestingly, I just read that you can downclock the CPU using Powerlogix's CPU Director utility for OS 9 and X.
Link demonstrating crappy heatsink
http://www.sterpin.net/uk/pismologixuk.htm
Just goes to show you should always give things a "rest" and try them again (years) later!
JB
It was put in a drawer and forgotten about. I came across it today, looked it over and noticed some parts of the board were covered in heatsink paste, which I removed. Threw it in my Pismo as a laugh, with a heatsink on top, it booted up without issue! I'll try to rebuild the Pismo now.
The cooling for this upgrade is complete rubbish - it comes with a thin piece of copper that you seemingly put in place of the small L-shaped heatsink, and is simply not enough. It is a 1000Mhz CPU, downclocked to 900Mhz - due to overheating concerns. I'm hoping that if this CPU continues to work, I'll rig up a small fan and custom heatsink inside the Pismo. Interestingly, I just read that you can downclock the CPU using Powerlogix's CPU Director utility for OS 9 and X.
Link demonstrating crappy heatsink
http://www.sterpin.net/uk/pismologixuk.htm
Just goes to show you should always give things a "rest" and try them again (years) later!
JB