>From Jeff Walther,
>>Date: Wed, 12 Feb 2003 00:18:10 -0500 >>From: "Wallace Adrian D'Alessio" <[EMAIL PROTECTED]> > >>> Did you do the research to *know* whether it would work? >> >>I took the sellers word on it. > >And the seller is correct. The clone CPU cards work fine in >Macintoshes, including the Power Computing cards, with a few >exceptions, but they are all electrically compatible going from clone >to Apple. There are some problems moving Apple cards into the >Catalyst based PCC clones. The main issue moving a Power Computing >CPU into an Apple has to do with bus speed. That sounds promising. > >Anyway, back to the topic at hand... > >That "jumper block" on top is not a jumper block. It is a cable >connector for Umax's proprietary dual processor configuration in the >S900. It was used to cable the two processor cards together. > >In single processor mode, with the card's components (heat sink) >facing you, and the edge connector toward you or down, the left three >pairs of pins should be jumpered. > >I've seen one of these (200 MHz 604e Umax) fail for no apparent >reason. Could be they're a little extra static sensitive. It's >hardly a statistically significant sampling though. I wore a strap when installing it. > >The Umax cards for the S900 and J700 are all built to Apple's specs >and work fine in the Apple machines with a CPU slot. The 233 MHz >card has a fan mounted on teh heat sink which presents some fit >issues in a few machines, and the cable connector at the top of the >card can cause a fit problem wtih the lid (CPU card stabilizer) of >some models. I will trim it. > > >One thing that could be causing your problem is if your particular >7600 will not tolerate a 50 MHz bus speed. The 7600 should run fine >at 50 MHz. But it's a possibility. You might try pulling your L2 >cache, if you have one installed. Sometimes a slow cache will hold >bus speed back. The 200 MHz card runs the motherboard with a 50 >MHz bus speed. So far just a gray screen no bong . > >What CPU card were you using before? I saw a bizarre problem once >where a 150 MHz PPC604 card would work fine in a machine but nothing >later would. Very strange. Turned out the 3.3V cable from the >power supply had come loose. The older PPC604 apparently didn't use >the 3.3V supply, but the newer cards (PPC604e and later) needed it. > I was and still am right now using a 132 Mhz card. I will check the low voltage wires and connector. >Jeff Walther > Adrian D'Alessio -- 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
