---------- Original message ---------- Subject: Re: Dead processor? Date: Wednesday, 22. June 2011 From: [email protected] To: [email protected] > ANY DA processor, single or dual uses only the socket for ALL its signals > and power. This is the same socket as the 100 MHz bus processors, but > because the physical position is different, there can be no mechanical > interchangeability.
With the required soldering for the correct bus:processor speed ratio any SINGLE 7410+ processor should work on any AGP to QS2002 system board. Like here, a DA single processor on an AGP system board (100 MHz bus): http://xlr8yourmac.com/systems/DA_CPU_in_Sawtooth/DA_CPU_mods.html The 7400 doesn't support > 100 MHz bus speeds. At least all the third party upgrade cards simply set the correct jumpers for the bus speed and work on all the G4 Power Macs from the AGP to the QS2002. The DUAL modules are incompatible due to physical limitations – they simply don't fit in. > Any QS processor, single or dual, uses BOTH the socket AND an additional > terminal for power. > > DA processors are incompatible with QS machines. I've heard that it was possible to take a single 733 MHz processor module from a DA and use it in a QS replacing the original single 733 MHz G4, because the QS version lacks L3 cache, whereas the DA version doesn't and is therefor faster. Not true? > QS processors are conditionally compatible with DA machines PROVIDED a > secondary source of +12 volts is provided to the processor card. I heard that too – but with a QS processor in an AGP/GE. The original site has gone, but it has been crawled by the Way Back Machine: http://web.archive.org/web/20090505190332/http://homepage.mac.com/josephk/G4_mod.html The difference from the DA to the QS seems to be only the additional 12v line. Thanks for your help, Andreas aka Mac USer #330250 -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
