33Mhz CPU Crystal for 68060
 

Anyone know where I can get a 33mhz crystal for my 608060

It uses Fox F1100E four pin crystal

Thanks!

Digikey has a few but look under Oscillators for the 4 pin types, ACH-33.000MHZ is available.

Shaf

Shaf,

Thanks for the quick reply. I will check it out!!

Shaf, that Oscilator is the half size. I need 14 pin din. But no worries. I found on ebay for 99 cents 32mhz crystal Fox F1100E which is a direct replacement for my 25mhz crystal. So I will only get 64mhz and not 66mhz. I don't think it will make any speed difference. And the 68060 should run a little cooler :)

Wouldnt you need a 66mhz crystal to run at 66 with an 060? I know in my apollo with an 040 a 66mhz crystal runs at 33 with an 040 and 66 with an 060?

I was thinking the same. My 50Mhz 68060 has a 50Mhz crystal. Maybe it depends on the board?

Yes, seems that GVP is different compared to other makes.

Thanks Maffi! That looks interesting.

On my 060 accelerator it has a 25mhz crystal so that runs the CPU at 50mhz, so to get 66mhz I need a 33mhz crystal.

My 2c: you might not be able to overclock that GVP. The timing of the 25mhz crystal is also for the board, ram etc.

I had very little success overclocking GVP products back in the day.

Also, definitely have a cooler on that CPU if it is original from the 90s since they ran super hot.

J

This is a Rev. 1 68060. If it even runs at 66 MHz (some are reported to be able to) you can boil an egg on it...

Thanks! If it can be overclocked great. If not Im only out $4.00

I burnt my 4000 3.2 ROMS today so we will test at 50mhz and 64mhz.

Ill let you know if it works!

Thanks for all the answers :)

Maybe you should try a selection of clock crystals?

My CyberStorm MKII (also an early XC version) worked at 66Mhz but the SCSI module didn't like it. I'm a little scared of breaking it!

At 50MHz it never gets really hot (A4000).

We are off to a good start. I put the 32Mhz crystal in the accelerator and it booted. So in order to see if it really works, I need to complete the build.