Subject:     7500 and Bus Speed News
Date:        10/12/98 2:01 PM
Received:    10/12/98 5:10 PM
From:        Eugene Kuo, 
To:           xlr8yourmac.com

Hi,

I'm a regular reader of xlr8yourmac and appreciate all the news and tips
you publish.

I have some news to relay to you regarding bus speed on the PCI Macs and
the G3 Upgrades.

Last week I installed a Bottom Line Railgun 275/1MB (2:1) in my 7500
with a VAL-4 board.  

My system is as follows.
No motherboard cache
96MB RAM (uninterleaved)
Sys 8.1
1GB Quantum Fireball
4.3GB Seagate Barracuda (SCSI-2N)

External 750MB APS Quantum
	Iomega Zip SCSI

Since uninterleaving the RAM (interleaving caused some strange type 1
and 2 and 3 errors), the card has been rock solid.  Furthermore,
according to Newer's Cache-22, Newer's (can't remember the name right
now) CPU/Bus speed measuring utility, Sonnet's Metronome, and Apple's
System Profiler (I think...can't recall if it measures bus speed, but
I'm pretty sure), and anything else I could find to measure bus speed,
my 7500 is running at 50 MHZ!!!

I couldn't believe it!  (actually 50.1Mhz)

I've had the card running as fast as 325Mhz but dialed it back to 300
for longevity's sake.

According to MacBench 5.0 (only the downloaded part) my 7500 is neck and
neck with a new G3/300.  (no libmoto)  

The dial setting instructions for my card say PowerJolt rev.2 on them
and give settings for as high as 55Mhz bus speed.  I haven't and
probably won't try them.  

I don't know if this is a new development or not, but I thought that I
would just share this (since the feedback page for G3 CPU upgrades is
still down).  

A previous attempt with a Sonnets 266/1MB did not work.  

-Eugene C. Kuo