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Dual 867 OverClock
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will this procedure work on a 733 Quicksilver? if so, i'll do it right now and post the results. it has 1.2 gig RAM and is running 10.2.1 and 9.2.2. please, let me know if this is possible or if there is a chnge i could make in the script for my machine.
I want to do it on my 933
I will do it on my 933 is someone can give me proof it works with my CPU also
I will do it on my 933 is someone can give me proof it works with my CPU also
Re: I want to do it on my 933
HELL YEAH!!!
Someone get this guy some proof!! and quickly! i don't know how much longer i can wait, the suspense is killing me...
HELL YEAH!!!
Someone get this guy some proof!! and quickly! i don't know how much longer i can wait, the suspense is killing me... 
Wow, that does not seem that hard at all!
If I had a dual-867 then I'd do it...
Just don't make any typos..
If I had a dual-867 then I'd do it...
Just don't make any typos..
Yes, at the end of the article he does state that you will need pc2700 in order to take advantage of the new clockspeed.
Sounds cool, pay for a dual 867, overclock to dual 1ghz.
I wonder if there are any heat related issues, is the cooling system in the 867 the same as in the dual ghz or dual 1.25ghz?
Yes they share exactly the same case specs right down to the fans mother board etc.. With the only real differences being the resistors on the board designating the bus and clock frequency and the cpus themselves.
going the hardware way
There is this article that shows how to overclock the new DP867 by making some changes on the hardware. The article however is in French.
http://www.macbidouille.com/niouzcontenu.php?date=2002-10-8
I am very tempted myself to do something like this, but clearly if the software way was just as good, it would sound a lot safer.
Anyway some dudes over at mnacbidouille already posted successful overclocking with the method described there.
There is this article that shows how to overclock the new DP867 by making some changes on the hardware. The article however is in French.
http://www.macbidouille.com/niouzcontenu.php?date=2002-10-8
I am very tempted myself to do something like this, but clearly if the software way was just as good, it would sound a lot safer.
Anyway some dudes over at mnacbidouille already posted successful overclocking with the method described there.
This won't work with any other computer, especially the older ones. PC133 ram very rarely hits 166mhz, which is what it would have to be able to do.
Second, the new MDD towers have software controlled pll settings, which means they can be overclocked with software.
As soon as I get my Dual 867 and ram I'll try it.
Second, the new MDD towers have software controlled pll settings, which means they can be overclocked with software.
As soon as I get my Dual 867 and ram I'll try it.
Hey.. I've got me a dual 867!
Should I go about doing this? What's the risk? I don't wanna blow up my computer here... but an extra 200mhz would be nice.
- Springs
Should I go about doing this? What's the risk? I don't wanna blow up my computer here... but an extra 200mhz would be nice.
- Springs
The ONLY reason to use any type of overclocking, given the risk of a warranty void, would be if your Mac is old and absolutely needs to be faster.
However, this rearrangement configuration lacks the necessity for any physical methods on your computer, except typing in everything correctly and understanding the directions. Once it becomes necessary to overclock the PowerMac you increase the chances of burning up something inside. You better keep that thing in a cool area and where there is significant air flow if you are going to maximize the life of your redlined Mac.
To directly answer your question, spring, don't do it. Unless you follow the restrictions I previously stated, you are likely to overheat something inside the PowerMac, thus rendering it as Apple's first DDR paperweight.
Regardless of what would be "nice", I'd like to increase my xBox PIII chip speed to 1GHz if I could have someone do it for me, but then I would have a greater chance of destroying the system/processor, which originally cost $300. Think about what would happen if you destroyed a $1000+ computer.
However, this rearrangement configuration lacks the necessity for any physical methods on your computer, except typing in everything correctly and understanding the directions. Once it becomes necessary to overclock the PowerMac you increase the chances of burning up something inside. You better keep that thing in a cool area and where there is significant air flow if you are going to maximize the life of your redlined Mac.
To directly answer your question, spring, don't do it. Unless you follow the restrictions I previously stated, you are likely to overheat something inside the PowerMac, thus rendering it as Apple's first DDR paperweight.
Regardless of what would be "nice", I'd like to increase my xBox PIII chip speed to 1GHz if I could have someone do it for me, but then I would have a greater chance of destroying the system/processor, which originally cost $300. Think about what would happen if you destroyed a $1000+ computer.
hey
why doesn't someone try doing this on a DP at school or @ an apple store, it might seem evil but its one way to know it works without having to worry about out of pocket expenses.
why doesn't someone try doing this on a DP at school or @ an apple store, it might seem evil but its one way to know it works without having to worry about out of pocket expenses.
Actually if you guys go to XLR8's web site in the forums on modding, they talk abotu this. I think they conclued it can't be done with just SW, and needs some jumpers to be removed or something. If I could post there I would, and ask for a complete explenation. If anyone can it'd be great/.
We aren't talking about PC133 ram here. The dual 867's use PC 2100 ram, which is running at an effective rate of 266Mhz. You DON'T need to get new ram to run at the new speeds. about 80% of all PC2100 RAM can run at 333Mhz (PC2700). How do I know? I have PC2100 RAM running at 333Mhz.
hey davidc2182, that's a good idea. someone should do that at school or college or something... just make sure it's near alot of fans and in an air-conditioned room.
Okay, finally needed to reboot, and tried this.
It does report Dual 1GHz.
It messes up Xbench results (629 was my score!).
ASP reports both porcessors as 1.83GHz instead of 1.083GHz.
It kills coregraphics peformance. 3+ secs for the dock to unhide. 2+ secs for an aqua menu to draw.
The machine may be processing faster, but until I can resolve the Aqua probs, I've reverted.
It is saved in my nvramrc, so I can switch back easily if anyone has suggestions for aqua...
Test machine was Dual 867, 2GB PC2100, Radeon 9000, Radeon 7000 (driving wing displays).
It does report Dual 1GHz.
It messes up Xbench results (629 was my score!).
ASP reports both porcessors as 1.83GHz instead of 1.083GHz.
It kills coregraphics peformance. 3+ secs for the dock to unhide. 2+ secs for an aqua menu to draw.
The machine may be processing faster, but until I can resolve the Aqua probs, I've reverted.
It is saved in my nvramrc, so I can switch back easily if anyone has suggestions for aqua...
Test machine was Dual 867, 2GB PC2100, Radeon 9000, Radeon 7000 (driving wing displays).
I did it and am running it now. The only prob i have is that my fan spins a bit faster than a true 1Ghz's.
I used PC2700 and live in a ducted air-con house.
I haven't got any of the problems you described nipsy.
Ooops sorry, i have one - ASP reports 133Mhz bus and 1.83Ghz procs: should say: 167Mhz bus and 1.083Mhz procs. BUT - About This Mac says Dual 1Ghz.
Got me but this is the only problem i have had and consider it to be nothing worth worring about considering i save AUD1500.
[Edit] XBench detects my procs correectly as G4 @ 1Ghz.
I used PC2700 and live in a ducted air-con house.
I haven't got any of the problems you described nipsy.
Ooops sorry, i have one - ASP reports 133Mhz bus and 1.83Ghz procs: should say: 167Mhz bus and 1.083Mhz procs. BUT - About This Mac says Dual 1Ghz.
Got me but this is the only problem i have had and consider it to be nothing worth worring about considering i save AUD1500.
[Edit] XBench detects my procs correectly as G4 @ 1Ghz.