Overclock my CS MKII '060

[X-ray]

@ PaSha

I have the FAS chip on mine and I can't overclock it. There must be some other reason than purely the chip type. I can't even go to 60mHz with it, even though all my SIMMS are 60ns. Check my photo album to see my setup.

[PaSha]

X-ray wrote:
@ PaSha

I have the FAS chip on mine and I can't overclock it. There must be some other reason than purely the chip type. I can't even go to 60mHz with it, even though all my SIMMS are 60ns. Check my photo album to see my setup.

Easiest way to find out is to overclock without the SCSI module attached. Also, try with different RAM, or even a different 68060. (my CS-PPC was delivered from Phase5 with a dodgy early prototype 060).

[Effy]

Please don´t shoot me for my easy thinking, but what if you just replace the 060 with a LC060@75Mhz How bad can this LC be  :-?

[X-ray]

@ PaSha

The original tests that I conducted gave me perfect performance at 60mHz without the SCSI module. As soon as I attach it, however, I cannot have 60mHz without crashes.
Maybe it is that combination of 060 and SCSI?

[doctorq]

AMIGAZ wrote:
50pin SCSI drives are dirt cheap..just wish they could be bigger..seems like 4.3gig was the biggest size back then
But an 50pin-->68pin adapter solves that problem  :-D

Overlooked this one...

Correct, 50 pins SCSI drives are dirt cheap, but the problem is that I want to install a 18 GB as a minimum, and preferably a 15k RPM one. I already have some 50 -->68 pin converters, but if I use these I will have to remove the CD drive. I wish there were a bit more room in the A4000D :-)

[PaSha]

Effy wrote:
Please don´t shoot me for my easy thinking, but what if you just replace the 060 with a LC060@75Mhz How bad can this LC be  :-?

Because it's a PLCC chip? (hence it will not fit).

Anyways, the limiting factor is the slow old SIMM RAM. The CT60 Atari board happily runs a full 68060-60 chip at 100 MHz.

@X-ray:
Bum luck with your cyberscsi....

-Paul