Is it possible to swap the CPU in a 450 MHz sawtooth with a single 867 MHz from a (sadly fried) Quicksilver ?
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PowerMac G4 Sawtooth CPU Upgrade
- Thread starter PowerHack
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I don't think it will run at the right speed, due to the 100mhz vs. 133mhz bus speeds. My guess is that it might work, but at 600mhz.
A QS card will need an extra +12V run to the 4th screw hole.
I think the bus speed will also be a factor as mentioned-I've been meaning to test this for myself to see what happens.
I think the bus speed will also be a factor as mentioned-I've been meaning to test this for myself to see what happens.
Okay, I'm wanting to test it but unsure if I should. As I don't want to put my G3 (400MHz 576MB Rage 128) back into active duty.
I tried putting a 733mhz Quicksilver card in my Digital Audio, doesn't boot at all and all I heard were fans.
I've actually been thinking this over for a week or two. My gut was that the processor would run slower due to the bus speed differences, but I've also known of examples Apple of processors changing their multiplier to run at their rated speed. Usually the multiplier is reduced(such as putting a 133mhz MDD processor on a 167mhz logic board), but thought that maybe a newer processor in a Sawtooth might actually run at its rated speed.
In any case, I quite literally have a Digital Audio(133mhz FSB) sitting next to a Sawtooth(100mhz FSB). The DA has a 533mhz processor, which works out to a 4x multiplier.
I stuck that card in the Sawtooth, and the Sawtooth reported it as 400mhz-or 100mhz x 4. See the below photos for pictures of the "operation" and the screenshot from the Sawtooth.
I have an 800mhz Quicksilver processor lying in a drawer that I could have tried this in, but really didn't feel like soldering the 12V line onto it tonight(plus I intend for it to end up back in a Quicksilver, so don't want to mess up the mounting holes).
So, based on that quick experiment, I'd say the above math is correct that an 867mhz Quicksilver processor will run at 600mhz in a Sawtooth.
And, again, don't forget to run the extra +12V to it, or the computer won't work at all!
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Okay, so it will run at 600 MHz. I'll probably install it just for fun, but to be sure, the fourth screw hole is the one which isn't being covered by the heatsink correct ?
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Also, would it be possible to put a GeForce 4600 Ti (AGP 4x I believe) in the sawtooth despite the fact that it only has AGP 2x
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Also, would it be possible to put a GeForce 4600 Ti (AGP 4x I believe) in the sawtooth despite the fact that it only has AGP 2x
It Works ! Thanks everybody. Had to jam it into position as the IDE connector was in the way (as Intell stated) and it runs at 650 MHz ! All I did was grab some speaker wire, tape it (for the moment to test it) to the 4th hole, and then steal the 12v from an IDE power connector.
Now its fully (partially) built. I soldered some speaker wire to the 4th hole, and connected it to the 12V fan that I installed on top of the CPU heatsink, removed the DVD Burner and the zip drive (as I don't use them and have a USB DVD burner), now the only issue is the top "tray" that holds the PSU.
If you're set up for soldering, you could re-solder the jumpers that set the multiplier and get it running at full speed again. It would probably do 900MHz fine. Congrats on the upgrade!
Nope, I just cut off the top peice of the connector and basically jammed the CPU on. But its fully screwed in, the CPU board is *Slightly* warped (more curved than warped) but it runs.
Thanks, I know. The current setup isn't permanent, eventually I'll just cut off/de-solder the ide connector but for the moment it runs.