"Power Macintosh Card" and "601 Processor Upgrade" - What is the difference?

[Jagmn]

I've recently acquired an Apple 601 (50/66Mhz) card in a bombed 475. Does anyone have schematics for these? I'm probably going to have a go at overclocking a 575 and 475 with/without the upgrade card.

 

[joshc]

I think your initial thoughts are correct @Phipli. The 601 Processor Upgrade control panel is for the 475/etc card only as far as I know.

 

[nottomhanks]

Following up on this: I have two of these cards, one has bent/broken pins on the 040, and the other one gives me no video when switching from 040 to 601 boot. Will always show desktop when booting to 040.

 

[BobDaAggie]

Following up on this: I have two of these cards, one has bent/broken pins on the 040, and the other one gives me no video when switching from 040 to 601 boot. Will always show desktop when booting to 040.

Would you be willing to sell one?

 

[nottomhanks]

Hi there, I am keeping both of them, as I got the 2nd one repaired by purchasing a series of replacement 040 sockets. Thankfully it's back in business. The reason the one was booting to black was because I was using the wrong extension. I have two Color Classic Mystic PPCs, and I may sell one of them in the fall.

 

[BobDaAggie]

I am glad to hear that it is fixed. Keep me posted if you decide to sell one of your CCs