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Dual QS 800MHz CPU in a sawtooth

alectrona6400

alectrona6400

macrumors regular
Original poster
Mar 1, 2019
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so i've been working on upgrading my 1st-generation Power Mac G4, which has a dual 500MHz G4 currently in it. I installed a SATA PCI card and i plugged the optical drives into the HDD IDE port on the board. i cut off the old optical drive IDE connector and now I need to find where I need 12V on a dual card. i've heard that 12V can be put on a single QS card on the 4th screw hole, but i'm unsure about a dual. can anyone help me out here please? i do not have access to a multimeter. below is the card that looks like the one I have. i also took the time to fix up the choke coils so that the dual heatsink from my G4 can fit.
1589290228250.png
 
UPDATE: only one of the CPUs are detected. what i can infer is that apple added more screw holes to the card for 12V transfer. looking at the DA card and the QS card, the QS has another hole (the dual has 2 more) and on a dual DA card (which uses 7410s rather than 7450s), it has the original 3 holes. i'll try adding 12V to the 5th hole and i'll see if that fixes my problem. also, the new PSU is working great even if it's an OEM one.
 
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well would you look at that, geekbench scored 100 points lower than my dual 500MHz 7400 CPUs.
this was a mistake
 
z970mp said:
Click to expand...
Haha, i literally thought about that. friendship ended with "dual" 800 now dual 500 is my best friend
i'm also pushing my luck on one of my dual 450 cards, seeing if i can get it to 550. it chimed, but there was no display. i'm thinking a voltage increase will be needed. also my Ti 4600 died, press F to pay respects

EDIT: can't go above 2.1V, staying at 500. pretty speedy CPU anyway lol
 
Dual QS cards still only mount to the lobo with 4 screws iirc. Some sawtooths can’t recognize 2 cpus.

Don’t forget that an 800mhz QS will also run at 600mhz in a sawtooth unless you change the multipliers.
 
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To back up my earlier comments on the additional lug on dual cards...

I had planned to photograph one anyway, but an opportunity presented itself this evening when I came across a GPU that I needed to check to see if it had been flashed. The only system I had hooked up and handy was favorite dual 1ghz Quicksilver, so I pulled its Geforce 4Ti, dropped in the card I wanted to test, and only got a single glow from the power button before it shut off. I looked a bit closer...then realized there was no CPU installed(I'd last used it to test an aftermarket upgrade, and didn't have any paste at the time to put the original back in).

I pulled the original dual 1ghz card out, but snapped a photo before pasting it and fitting a heatsink. I actually don't have a 4th screw here, but I'm almost positive one is normally installed. In any case, as can be seen the 5th hole is over one of the LoBo mounting screws, but doesn't actually come into contact with anything.
 

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bunnspecial said:
To back up my earlier comments on the additional lug on dual cards...

I had planned to photograph one anyway, but an opportunity presented itself this evening when I came across a GPU that I needed to check to see if it had been flashed. The only system I had hooked up and handy was favorite dual 1ghz Quicksilver, so I pulled its Geforce 4Ti, dropped in the card I wanted to test, and only got a single glow from the power button before it shut off. I looked a bit closer...then realized there was no CPU installed(I'd last used it to test an aftermarket upgrade, and didn't have any paste at the time to put the original back in).

I pulled the original dual 1ghz card out, but snapped a photo before pasting it and fitting a heatsink. I actually don't have a 4th screw here, but I'm almost positive one is normally installed. In any case, as can be seen the 5th hole is over one of the LoBo mounting screws, but doesn't actually come into contact with anything.
Click to expand...
on your cpu, i have 2 extra screws attached to the cpu. on your picture, you have the 3 for the regular cpu, and the other two by the fan and cover pull tab, both of mine are connected to the main bottom plate and both boards

PS, thats a QS DP 1Ghz board
 

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ervus said:
Thanks for sharing those pictures. Here is a picture of the modified Sawtooth heat sink with the Quicksilver CPU:

dual1-3.jpg


It's a pretty good fit except for that one inductor.
Click to expand...
This is intriguing. I’d love to try this on my Mystic. It’s got a dual 450Mhz in it. I always used it over the QS because of the extra ram slot.
 
woah i didn't know people still carried this failed attempt post on
nice work ervus! i'd love to find more G4 parts again, i think the reason to why my QS card kinda died was because i probably messed up a solder pad for one of the inductors since my iron is such a piece of crap (i was on a tight budget ok). unsure if i still have the card (probably don't lol, i was told to get rid of nonworking stuff by my parents) but i MAY try this again. however i'd like to get some advice on what to do with the IDE connector for the optical drive. SATA over PCI is real slow...

sent from my powerbook g4 that smells like a sweaty gym bag (thanks keyboard) and chugs whenever you turn down the brightness on debian sid with xfce4
 
from what i understand, the IDE connector can either be relocated to 90 degrees or removed altogether. As for sata over PCI, my firmtek card doesn't show signs of being slow. it's faster than the onboard ATA-66 on my QS
 
reddrag0n said:
As for sata over PCI, my firmtek card doesn't show signs of being slow. it's faster than the onboard ATA-66 on my QS
Click to expand...
i might take a look another time. i just noticed that it took a while to get to the bootup sequence.
 
superlions16 said:
i might take a look another time. i just noticed that it took a while to get to the bootup sequence.
Click to expand...
I know the firmtek/seritek cards have native booting for sata hdd's, not so much for cd drives. Mine boots up OS 9 and 10.5.8 in less than a minute. And that's from platter drives.
I know that there is a thread about flashing sata cards that would work on macs. Maybe that could be a way to go instead of shelling out $119 USD for a card like i did.
 
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