Michael J. Flaherty [EMAIL PROTECTED]
wrote:
Do you have 70ns VRAM in the Mystic 040 ? If so,
where did you
find it ? I haven't been able to locate any.
I don't know. I have never thing of this problem. I
just overclock
it and it works. I had overclocked 4 LC575 board and
one of them
could only be overclocked to 38MHz, others could work
at higher
freq like 43MHz but the CPU must have heat sink and
fan.
I'm guessing that you have a 20 MHz crystal in this
575 board which
forces the 601 (originally a 100 MHz PPC upgrade) to
run at 120
MHz (3x 040 speed), correct ? How does it perform ?
Exactly. The change is same as normal LC575. But its
very unstable,
I tested it to run more than 4 hrs, OK. Yesterday, I
could not run
it for several minutes even at 96MHz. I will test it
with better
ventilation to see.
8.1 is a little bit slower on the desktop and slower
to startup
for sure. Once it loads up, it's fine. It really
doesn't feel
slow, even at 33 MHz, which is what my Mystic runs
at.
Thank you. Two years ago, I ran a 40MHz 575/36MB for
a year for
daily work with sys 8.1 . Web browsing was slow. But
most of the
work was using telnet. That was fine.
I don't know the exact percentage of slowdown you
will experience
with 8.1. Since you have your Mystic running at 43
MHz, I would
probably use it. Your machine is quite fast and
should run it
well. You've built a machine for lifting heavy
weights. If it
was mine, I would want to give it some weight to
lift just to see
how it performs. You can always go back to 7.1,
7.5.5, or 7.6.1
if you find 8.1 unsatisfying.
My notion of the perfect OS for an 040 Mystic is as
follows :
Thank you very much. Then, I will install 8.1 into
HD, 7.1 into
RAM disk and use the DiskCopy to create an image.
Whenever I want
7.1, I'll generate it from the disk image and reboot.
I don't want to hook a CD-ROM drive. I'll access CD
through a networked
G4-cube. Further, I doubt if I could simply copy the
whole RAM disk
in and out (it seems to me I cannot simply copy to
make a boot HD,
I have to install in order to make a boot disk),
therefore, I prefer
the DiskCopy.img approach.
I would still use 8.1, although it will use up a
large portion of
Its 10MB from my experience.
your RAM. Depending on the software you run, you
may need RAM
doubler or virtual memory at times, which would be
undesirable.
I guess I'll use virtual memory rather than RAM
doubler because VM
is native from Apple and free.
From what I've read on the CC forum, 64 and 128 MB
SIMMs won't work
with the PPC upgrades, which is unfortunate. Your
chosen configuration
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