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PPC upgrade from 66mhz to 100mhz?
Posted by: Sir Foxx on 2020-05-01 13:16:25
Just curious, has anyone tried this upgrade to their PPC card? I have the skill set to attempt something like this, but I'd hate to cook my card cause of some difference between the IIci card referenced in the writeup and my card (no idea what 66mhz variant it is. Mine is being used in a Q950).

http://www.applefool.com/clockchipping/dt601.html
Posted by: jeremywork on 2020-05-01 15:33:04
Yours is not a Turbo 601, but a PowerPro 601 (for the 040 PDS, rather than the cache slot for 030 models.) The base 50/66MHz version was also sold by Apple as the official PowerPC upgrade card for Quadras with PDS slots. It runs at double the 040 system speed.

I think you mentioned you have a PowerPump? With the included fans, you should be able to run around 75MHz at 37.5MHz 040 speed, and I believe even faster with the 040 removed from its socket (90MHz is about the top you can expect from this one.)

I have the 100MHz version combined with a PowerPump, and it can run 115.6MHz with the 040 still in place (the actual chip on-board is rated 120MHz, but even though the 040 runs stable at 40MHz+ without the PPC, it won't run the PPC at 40MHz bus with the 040 installed.)
Posted by: Sir Foxx on 2020-05-01 16:00:51
Yours is not a Turbo 601, but a PowerPro 601 (for the 040 PDS, rather than the cache slot for 030 models.) The base 50/66MHz version was also sold by Apple as the official PowerPC upgrade card for Quadras with PDS slots. It runs at double the 040 system speed.

I think you mentioned you have a PowerPump? With the included fans, you should be able to run around 75MHz at 37.5MHz 040 speed, and I believe even faster with the 040 removed from its socket (90MHz is about the top you can expect from this one.)

I have the 100MHz version combined with a PowerPump, and it can run 115.6MHz with the 040 still in place (the actual chip on-board is rated 120MHz, but even though the 040 runs stable at 40MHz+ without the PPC, it won't run the PPC at 40MHz bus with the 040 installed.)
Ah. With how little info there is out there about these cards, I didn't know there was a difference. 

I do have a powerpump. Could you make a disk image of your floppy? Mine is partially corrupted, but luckily the control panel is still useable.

Dang, I didn't know that about removing the 68k processor. I may try that this weekend.
Posted by: jeremywork on 2020-05-01 16:18:20
The control panel is the only magic sauce, but there are a couple nice utilities in there...

View attachment PowerPump™.img

I opted not to remove my 040 personally, as I'd need to add it again if I ever wanted to PRAM reset.
Posted by: nottomhanks on 2025-03-31 15:49:08
Just bumping this thread, what’s the story with PowerPump?
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