>From: PLM <[EMAIL PROTECTED]> > >Date: Wed, 25 Sep 2002 12:34:20 -0400 > >I received a G4 Chip (OWC) a few days ago and installed. Some notes..the new >chip has no jumpers..as the xlr8 did (What were they for?) and I can't seem >to be able to get this G4/450 clocked any higher than 400. I've set the >switches (on card) according to my XLR8 manual, but If I boot (Xpostfacto >2.2) above 400, to 450 it seems to freeze in the boot process where it >checks the "backside cache" (X Splash) I'm puzzled... I'm using Powerlogix >Cache Control X (to view) the machine, It has run flawlessly with the >original xlr8 G3/400, overclocked to 450 for months. Running 10.1.5...1 gig >ram...VST 66 ATA...Radeon 7000 PCI. Here's the kicker I CAN overclock to 500 >If I'm running classic which is 9.1 and it runs fine. Will S. and Robyn >Lyons Are you There? thanks for your previous insights...Phil Meza
The jumpers on your XLR8 card were for setting the CPU multiplier which can also be done on the Carrier card but the settings on the Zif took president(spelling ;-) over the Carrier card and was likely for when used in the Beige G3 which uses the Zif without the Carrier card. I'm looking in my XLR8 book and the settings for your card to run at 500mhz should be...1,4,5,8,9,10,11,12 on this is the 9x multiplier which is for G4's only but you can run at a slower multiplier but this would mean a higher bus for the same CPU speed which would mean a lower maximum speed. But you likely already know that for OS9. What are your other settings in Cache Control X? ARE you trying to set the cache ratio too high? Start low to get things to work. I'd start at 3:1 or even 4:1 if that is given as a choice. My G3 500mhz runs at the default of 5:2 in OS 9 but will do the faster 2:1 in OSX. So I have reason to belive cache can be faster in OSX but most CPU's it seems will crash at the 3:2 setting.If you get a warning when trying to set the ratio I say go with the highest that gives no warning. When running at 500 mhz and above write through should be turned on and while spec processing should likely be turned off in OS 9 it should be fine to turn on in OSX. If these setting still don't help I'd try a slower setting but still using the 9x multiplier. I'd start with the 450mhz cpu 50mhz bus which would be:1,2,4,6,7,8,9,10,11,12 there were some charts that gave wrong settings for some speeds but I belive the info I'm giving you is correct. I hope this helps,best of luck Will S -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.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/supermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
