> From: Jeff Walther <[EMAIL PROTECTED]> > Date: Fri, 8 Nov 2002 15:28:28 -0600 > > Has > anyone on the SM list been able to tweak out their S900 to run faster > than > 55Mhz? And at 55Mhz, it is still a 22% > increase in bus speed over stock. > > Your max. bus speed is heavily dependent on your CPU card. No doubt > motherboards have bus speed limits too, but in my experience, it's the > CPU card's capabilities which are the bottleneck on S900s. > > Every S900 I've tested will do a little over 61 MHz with an old > PowerBoost Pro 604e card. On the other hand, no matter which machine I > install it in, my ancient G3 220/110 will not run at faster than a 49 > MHz bus speed. A newer G3 300 I tested happily did 58 MHz. > > It's moot with the G4/800 anyway. You can't adjust the bus speed > without soldering to replace the oscillator. > > Jeff Walther I'd just like to add that Jeff is of course much more informed on hardware issues then most of us. My XLR8 carrier card with G3 300mhz Zif would boot and run as fast as 61.6mhz bus. I upgraded the Ziff to an IBM Copper 10x 500mhz Ziff it will boot and run as fast as 61mhz. I've been running it at 550mhz with a bus of 55mhz for over a year no problems. My thinking after talking to many people is that running it at the bleeding edge of what it will do will shorten it's life and perhaps give me corrupted data from time to time. If we are lucky Powerlogix or someone else will make a real G4 800 or faster that can be played around with. Sorry in advance to those that love their Sonnet upgrades with training wheels. My idea of a Sonnet G4 800mhz is maybe a G4 500mhz big time overclocked with a huge heat sink and about three big fans on it ;-) No thank you. Will S
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