On Wed, 30 Jun 2004 15:02:06 -0500 Jeff Walther wrote: >When clock speeds got higher, IBM and Motorola started building chips >with higher bus ratios. I haven't followed the G4s in a while, but >I think some of the later chips supported 14:1 and then 16:1 or 20:1. >The G4/700 and G4/800 cards use 14:1 and 16:1 bus ratios >respectively. That is how they are able to support those speeds. >In fact some folks experiments with clock chipping the G4/800 up to a >60 MHz bus speed to yield a 960 MHz clock speed. I don't remember >how this worked out, but it's fairly easy to do, as the oscillator on >the G4/800 is a half size metal can. >
So it is possible to get a cheaper Sonnet G4/700 card from eBay, rearrange the PLL resistor block for it to run at 16:1. All the while I thought the 700 cards had fixed 16:1 ratios with only the crystal-oscillator running at 43.75 MHz. Thanks for the info. Charlie -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
