PowerMac 604e/250 processor for a Cyberstorm MK3 ???

[Effy]

Can I put a PowerMac 604e/250 cpu on a Cyberstorm MK3 I am thinking of buying a 2nd hand MK3 without PPC ... any advice Overclockable when using 50 ns 32 Mb EDO´s

[Effy]

Forgot to add a picture : this is the one or another one that I found, though a bit slower : 200 Mhz one

[Framiga]

Hello

short answer . . .  nope :-(

Secondly its a 233 Mhz (but its not this the problem after all).

The problem, even if someone said that its possible (actually the board worked for some days or less)
is that you can't reworking a BGA CPU, on an already fitted CSPPC.

Even DCE, can't do it (or they prefer don't do it . . i don't know).

In few words . . . nada ;-)

Ciao

EDIT- and without speaking about desoldering the CPU by the MAC board!!! :-?

Other great problem is that the CSMKIII, lacks a lot of components used by the 604e.
(memory buffers, power regulation, and others)

CSMKIII_front

CSPPC_front

CSPPC_back

CSMKIII_back

[Effy]

Framiga : 1st, let´s say that desoldering is the easiest problem to fix. That will probably take less than a minute without damaging anything at all  :-)
2nd, a CSPPC card already has got a 604 PPC so what is the difference with the 604 that the Mac uses :-?
3rd, sorry for my limited technical knowledge, but what is a BGA cpu ?? Has it got a different size than the one in the MK3  :-?

[xeron]

You can't just buy a PPC and fit it to a CS Mk 3 to make a CSPPC.

First of all, the PPC chip used on CSPPC cards is a BGA or "Ball Grid Array" type, which can't be attached without specialist equipment and knowledge. So unless you know someone with a reflow oven, or a proper infrared heater, you're stuck at the first obstacle.

Even supposing you had the required ability and skill to successfully retrofit a BGA CPU to an already populated board, the card itself still wouldn't function as a CSPPC. All the glue logic, and power regulation parts required by the PPC are not attached to Mk3 cards. It was simply not worth the extra money for Phase 5 to pay for parts that have no use on the Mk3.

Really, it just won't work.

[Framiga]

Effy with all my respect . . . but desoldering/soldering a BGA component (Ball Grid Array) requires tools that you can't even imagine. (hot air reworking stations).

They haven't legs but small balls surface mounted under the CPU itself.

Take a look (carefully) to the posted picture and you will noticed that the CSMKIII lacks of a dozen of components too.

in even less words . . .  forget it :-)

Bye :-)

[Effy]

So you can not fit a PPC processor to a Cyberstorm MK3 that only has got a 060 or 040
And even if the Cyberstorm MK3 has got a 150 Mhz PPC on it, can´t you replace that by a faster one

Framiga : the guy that I think is able to fix it uses a professional hot air thing  :-)

[Framiga]

Effy .  . .nope.

With an already populated CSMKIII, even your friend can't do the job.

I'm doing repairs on one of my CSPPC and the thing that you want to do, is impossible.

EDIT- just for the sake of:

the components that lacks in the CSMKIII  are about 50 :roll:

[rayt]

So you can not fit a PPC processor to a Cyberstorm MK3 that only has got a 060 or 040

If course not. The cyberstorm MK3 was never designed as an 68k/ppc dual cpu board. Its a 68k only board. Fitting a ppc cpu on it would be just as impossible as fitting a x86 cpu on it.

And even if the Cyberstorm MK3 has got a 150 Mhz PPC on it, can´t you replace that by a faster one

There is no Cyberstorm MK3 with a ppc cpu on it. If theres a ppc on a cyberstorm card its a either a csppc or an MK2 with  this prototype addon. The csppc may look similar because its based on the original MK3 design, but as already said of course it has additional logic to integrate the ppc cpu.

[Framiga]

rayt

please . . . don't add confusion you too!

The PCB of the CSMKIII is the same of the CSPPC one . .  .the problem is another one.

You can't upgrade a CSMKIII to a CSPPC, period.

[rayt]

@ Framiga

Hmm seems that you're right. I stand corrected.

[Framiga]

:-)

i've learned a thing during my life (not too short, unfortunately . .!) . .  .

everyday, i learn something new (its not a shame).

Don't beleive to people who claims of knowing everythings.

We have a way to call them, here in Italy but . .  . :-)

PS- not referred to you Effy nor others in this thread :-)

[Effy]

Okay, now my brain slowly seems to realize it ..  :-D

[Dandy]

Effy wrote:
...
And even if the Cyberstorm MK3 has got a 150 Mhz PPC on it, can´t you replace that by a faster one
...

I only know of CyberstormPPC having an PPC-CPU onboard...

[x56h34]

603e and 604e chips sit on small tiny balls of solder (please don't twist this into a joke). ;-)
There's no pins on the CPU that go through the PCB at all. Even the 68k CPU's pins on CSMK3/CSPPC don't go through the entire PCB (this only applies to CSMK3 and CSPPC though). That's why both CPUs on CSMK3 and PPC are very, very, VERY fragile, and should not be pressed down on, never, ever, EVER!

At one time, there was a 160Mhz 603e chip that had pins and was soldered and in fact looked similar to the SCSI chip (on BPPC) which was more "damage resistant" than the next generation which used bubble soldering afterwards.