It is a Power Tower Pro. I have two working PTP motherboards right now.
One is a finicky sort, won't run stable above 54.6(below that is
perfectly fine though), no matter what, even with deinterleaved memory.
The other I have gotten to run up to 59.6MHz with rock solid stability,
memory interleaved. It is rare for a PTP to run very much over 60
though, and I doubt ANY exist that could actually reach 66MHz or
higher. Most Tsunami-based boards can reach similar speeds to what I've
achieved though.
The upgrade cards are often as much or more of a limiter than the
motherboard. I have 3 Carrier ZIF cards which I have tried out with the
same processor on the second motherboard I mentioned. One would not run
stable over 54MHz. Second only got 56MHz. Third one was the one stable
up to 59.6MHz. All 3 tries were with interleaved memory. CPU,
configuration, etc. was all exactly the same, only the Carrier card was
changed. Have found no real explanation for why this occurs, seems to
just be one of the many quirks encountered in these older systems.
- Alan
On Jul 30, 2005, at 6:43 PM, Gene Osburn wrote:
The PTP motherboards are usually capable of running up to 60MHz,
sometimes faster; all of them should be able to run at least 50MHz.
Some of the older 604 CPU cards used lower bus speeds for various
reasons, mostly techy bits involving the CPU multipliers and such.
Are you sure the PTP bus can be pushed that high? What's the highest
stable bus setting you've personally achieved with a PTP? I think you
may have the PCP (PowerCenter Pro) in mind when you mention "up to
60MHz, sometimes faster"....
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