Overclocking the 68060 cpu

[shIva]

@Shiva:
The cs mk1 has very fast memory access, which makes it difficult to overclock.

thx :-/
not even to 60/66 mhz ? in other words : what is possible with the mk i (w/o memory probs) ?

[Brian]

Ehm, akemust... I am able to read but Heatsink&Fan doesn't say very much. There's a pritty big span between a P1 heatsing&fan and a Athlon heatsink&fan. My fan is a simple P1 fan and I'm leaning against adding a modded P1 heatsing to make it fit underneath the f***ing simm. :-D I don't think such cooling is enough for a 60% overclocking of the 060 though, am I right? :-?

[Rob]

@PaSha

It certainly does have an FPU, I just checked with showconfig and
sysinfo.  Plus many demos, benchmarks and other software also report
the fpu.  FPU only versions of software seem to work fine too.

It is a later version and is certainly marked EC as stated before.
Like I said its the FPU that hangs it at 80Mhz.

[A4kT]

About  5 years ago I overclocked my CS Mk II from 50Mhz  to 60Mhz  (anything higher would yield crashes, lockups or just black screens.
It ran flawlessly until last month and then .... nothing, no startup.
I sent it to Jean Jacques of www.amiga.fr and he has now repaired it but he advises against overclocking st ating that it's not the COU that one worries about, it's all the other little components on the board. He seems to be doing a thriving business in repairing Mk II's & MkIII's so maybe I'll take his advice and when it arrives back here I will resist the temptation to overclock.
After all, there is no comparison to a stock A4000T  040 at 25Mhz with 16mb of fast and an A4000T 060 with 128 + 16 mb
The stock 040/25mhz setup seems almost painfully slow.
My opinon ( not advice) is do not overclock if you want to use your Cyberstorm for a long time

[Framiga]

@A4kT

yes but . . .no risk, no fun :-)

Ciao

[Damion]

Well, pending time and interest, I thought about
overclocking my 68060RC60 (now at 66mhz) to
70-75mhz...but I am first going to measure the
temperaute of all the chips before, and after
the overclock with an infrared thermometer. That
way I can notice if anything appears to be
getting too hot.

 

[Framiga]

Put an heat-sink on the SCSI chip also and a second fan, that blows air through the SIMMs.

Ciao

[Corrie]

Alkemyst,

Can you please send me a syspeed mod of your 060 80mhz??? I would love to see it!

I have a 68060 50Mhz cpu, not the "a" version, but it has worked flawlessly at 66Mhz for around a year now!

Anyhow, has anyone got the 68060 50Mhz overclocked to 75Mhz???