On Nov 2, 2008, at 2:04 AM, Paul wrote: > How much interchangeability is there between the AGP, Gigabit, and > Digital Audio models?
The full list, based upon what I've tested or have seen done... All Sawtooth processors will work in Gigabit Ethernet G4s and Cubes. They will also work in DA/QS systems with the proper multiplier adjustment. Single Gigabit Processors are the same as Sawtooth processors. Dual Gigabit Processors will work in Sawtooth G4s with a Uni N Chipset of 7 or higher. The processors can not physically fit in DA or QS G4s. They can be made fit in G4 Cubes. Single Digital Audio processors will work in Quicksilver G4s. The 466Mhz and 533 Mhz will also work in Sawtooth/Gigabit G4s/Cubes with the proper multiplier adjustment. Dual 533's from Digital Audio G4s should work in Quicksilver G4s (I haven't tested). The dual 533Mhz, 667Mhz and 733Mhz processors will not fit in Sawtooth/Gigabit systems without removal of the Optical Drive IDE connection from the logic board, I assume they won't physically fit in a Cube. Single Quicksilver processors will work in Digital Audio G4s if you connect a 12v line to the 4th processor mounting point. Dual Quicksilver processors will work in Digital Audio G4s if you connect a 12v line to the 4th processor mounting point, but you won't be able to use the L3 cache, so they will be significantly slower than using in a Quicksilver. All Quicksilver processors can be used in Sawtooth/ Gigabit G4s if you make the proper multiplier adjustment, supply 12v power to the 4th processor mounting point, and remove the optical drive IDE connector. I don't believe any Quicksilver processors can be used in Cubes. Sawtooth, Gigabit, Cube, Digital Audio, and Quicksilver processors are all NOT compatible with Mirror Drive Door G4s or Xserve G4s. Xserve G4 and Mirror Drive Door G4 processors are also NOT compatible with any other G4s. All Xserve G4 and MDD G4 processors can be swapped. These systems require both the motherboard and the processor to support 167Mhz bus speeds in order to run at 167Mhz, if either component is configured for 133Mhz, the entire system will run with a 133Mhz bus speed. Although I've listed what processors can work in what systems, this doesn't necessarily cover heatsinks and clearances. This is especially true when adding processors to Sawtooth/Gigabit systems which used specially shaped heatsinks to clear the optical drive bay and also MDD/Xserves which had many different heatsinks based on heat dissipation, height clearances, and component placement (choke coils). On the plus side, all MDD heatsinks seem to be built so that they can be used with single or dual processors so long as the choke coils fit. (Earlier G4s had heatsinks specifically for either single or dual processor use). Bonus info about power supplies: Sawtooth G4 = Yikes G4 = B&W G3 All of these power supplies are interchangeable. Gigabit Ethernet G4 = Digital Audio G4 (Later era DA G4s were different in that they didn't have an IEC output connection for a monitor. When using such a power supply in another system the wall of the power supply will be exposed where that connector usually is. When using a power supply with that connector in a later model DA, the connection is covered up by the rear case plastic. In either case, the power supply will still run the system without issue.) Gigabit Ethernet and Digital Audio G4 power supplies can be used in Quicksilver G4s. (ADC Power may be disabled (I don't have a lot of ADC equipment, so I haven't verified). There are a few NVidia graphics cards which utilized the 2nd 28v line of power as a supplement , those cards won't work properly in this case.) Quicksilver G4 power supplies can be used in Gigabit Ethernet and Digital Audio G4s. (You will need to disable the 2nd 28v power line before connecting or you may damage your logic board, but otherwise the connections are exactly the same.) Mirror Drive Door power supplies can be rewired to work in other G4s, but it's an extremely long process that is neither practical nor worthwhile considering they currently sell for 3x that of any other G4 power supply. Other G4 power supplies are not suitable for use in a MDD due to the extremely difficult process of rewiring and installing in a MDD case. -Donald Hall --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, 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] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
