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#1 2009-01-23 4:45 am
- lord_uranus
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- From: Japan
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extra cpu for a g4 worth it?
My 1.25ghz G4 powermac is still a great machine, but it could use a performance boost. When I bought it, I was intrigued by the ability to add another cpu daughter card, thinking this would help out years later.
well, now it's years later and was wondering if you think an extra CPU would make any difference. Maybe I can pick one up cheap on ebay. It's my home machine and besides mail and WP I use it for personal photo and video editing, occasional game.
I realize there are other ways to speed up the machine, such as additional memory or faster hard drives. But what I'm interested with this post is the effects of a 2nd cpu card.
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#2 2009-01-23 5:06 am
- dv
- Negusa Negest
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Re: extra cpu for a g4 worth it?
Nothing bad ever happened from getting a second CPU. But keep in mind the price - even a Mac mini will significantly outperform a dual G4.
"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#3 2009-01-23 8:19 am
- lord_uranus
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Re: extra cpu for a g4 worth it?
I've heard they're only good if the software has code to take advantage of the extra processor. But my own impression was that osx would take care of that, acting as data traffic cop...
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#4 2009-01-23 9:37 am
Re: extra cpu for a g4 worth it?
To a degree, but there are limits. OS X cannot make an app that is not written to take advantage of extra cores or processors split its load between core or processors, it can not always move active processes from one core or processor to another to make room for a particularly intensive process. Also like dv says even a Mini can outperform a dual G4 these days. Probably more so when the Mini3,1 (new machine identity that's been identified in the code of recent Apple software versions) line actually launches.
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#5 2009-01-23 10:09 am
- macnuke
- just a plano guy
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Re: extra cpu for a g4 worth it?
exercise in futility
so i guess it depends on how much exercise you want.
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#6 2009-01-23 4:46 pm
- D'Eyncourt
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Re: extra cpu for a g4 worth it?
Another thing to consider is that for your G4 there really isn't a daughter card option to simply add the second processor. In your case you likely will have to replace the current CPU daughter card with another with 2 CPUs on it like this 1.6/1.8 dual-processor card offered by Other World Computing. You won't be able to buy someone's MDD G4 in order to pull its CPU out and add it to yours,
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#7 2009-01-23 6:40 pm
- pottymouth
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Re: extra cpu for a g4 worth it?
dv wrote:
...even a Mac mini will significantly outperform a dual G4.
Ayuh.
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#8 2009-01-23 8:51 pm
- Graphic Autist
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Re: extra cpu for a g4 worth it?
pottymouth wrote:
dv wrote:
...even a Mac mini will significantly outperform a dual G4.
Ayuh.
Yes...but my G4 can hold 4 drives internally. It may be slow, but it can store a lot.
Just my way of justifying things aren't as bad as they seem...
Mac Pro 2.66 ghz Quad Core - 9 GB RAM - Mac OS X 10.6.2 & 10.5.8
MacBook Pro 2.4 ghz Intel Core 2 Duo - 4 GB RAM - Mac OS X 10.6.2
G4 MDD Dual 1.25 ghz - 2 GB RAM - Mac OS X 10.5.8
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#9 2009-01-24 12:56 pm
- dv
- Negusa Negest
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Re: extra cpu for a g4 worth it?
Graphic Autist wrote:
pottymouth wrote:
dv wrote:
...even a Mac mini will significantly outperform a dual G4.
Ayuh.
Yes...but my G4 can hold 4 drives internally. It may be slow, but it can store a lot.
Just my way of justifying things aren't as bad as they seem...
"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#10 2009-01-24 8:10 pm
- mrreet2001
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Re: extra cpu for a g4 worth it?
then you need extra plug strips, usb hubs cables more desk space. ect.
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#11 2009-01-24 11:09 pm
- dv
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Re: extra cpu for a g4 worth it?
mrreet2001 wrote:
then you need extra plug strips, usb hubs cables more desk space. ect.
Yeah.
But your computer would be faster.
"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#13 2009-01-25 2:50 am
- NightCougar_37
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Re: extra cpu for a g4 worth it?
Ok putting aside the Mini fanclub here...
Its really gonna depend on what you want to do with that machine. If you still enjoy it and plan to use it a bit longer...then looking into a CPU upgrade is a viable option vs replacing everything. But its going to then come down to, what you do with it. If you really don't use MP aware apps then it would go to waste. MP upgrades are generally much more pricey and you could just drop in a SP 7447/48 to get the same jobs done.
Again, storage wise...your tower is much better. So if you need storage, there you go.
However, there is still only so much you can do with it. Keep in mind, Apple will totally phase out RISC support. So in the long run, it would be better to invest that money in something new if you do think you'll want to stay up to date on OSX. Personally i'm not fond of Mini's. They just dump decent CPUs with inferior guts and wrap it up in a cute package for an inflated price. However, if the next gen ones do come to pass...consider it. If the rumor sites are true then Apple finally pulled it's head out of it's butt and gave the Mini some decent parts with the price back to where it introed at.
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#14 2009-01-25 4:51 pm
- dv
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Re: extra cpu for a g4 worth it?
::puts his mini in a sock and clubs NightCougar_37::
Do that with a Mac Pro.

"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#16 2009-01-27 8:24 pm
- lord_uranus
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Re: extra cpu for a g4 worth it?
Yeah, minis are fine, we had one at an office I used to work at. I was working under the assumptions that 1) a 2nd cpu was a plug in expansion card and 2) it cost less than the 6 or 7 or 8 hundred dollars for a new mini.
soooo, it sounds like the new reality is
1. adding a 2nd cpu is not as easy as I thought
2. very few apps take advantage of a 2nd cpu anyway
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#17 2009-01-28 12:32 am
- dv
- Negusa Negest
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Re: extra cpu for a g4 worth it?
lord_uranus wrote:
Yeah, minis are fine, we had one at an office I used to work at. I was working under the assumptions that 1) a 2nd cpu was a plug in expansion card and 2) it cost less than the 6 or 7 or 8 hundred dollars for a new mini.
soooo, it sounds like the new reality is
1. adding a 2nd cpu is not as easy as I thought
Yes and no - you're not "adding" the CPU, you're replacing your single-CPU daughtercard with a dual-cpu daughtercard. The new daughtercard can be cheap or expensive, depending on 1) your definition of cheap and expensive, 2) where you get it, and 3) what the specs are.
2. very few apps take advantage of a 2nd cpu anyway
Base libel.
Run "top" from a command line or use the Activity Monitor - it should tell you the total number of "threads" being run. You'll notice that some applications are divided up into more threads than others - this is a (very, very rough) indicator of how optimized the application is for multiple-CPU use.
A single thread is the smallest task that can be assigned to a single CPU. The operating system will automatically assigned threads to CPUs as they become available, trying to get the best performance it can.
Obviously, some applications will benefit more from multiple CPUs than others; but even if the application you're using doesn't, the fact that the OS can offload background tasks (drawing windows, beeping, or any number of other programs and mini-programs running all the time in the background) to the second CPU means you'll see some improvement no matter what.
"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#18 2009-01-28 12:02 pm
- CG5Addict
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Re: extra cpu for a g4 worth it?
On this topic of upgrading CPU's, is the a way to install a faster CPU in duel 1.8 G5 (2004) tower or a way to hack it to make it faster??
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#19 2009-01-28 1:02 pm
- dv
- Negusa Negest
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Re: extra cpu for a g4 worth it?
CG5Addict wrote:
On this topic of upgrading CPU's, is the a way to install a faster CPU in duel 1.8 G5 (2004) tower or a way to hack it to make it faster??
The only guarantee is replacing the motherboard as well.
"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#20 2009-01-28 6:00 pm
- D'Eyncourt
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Re: extra cpu for a g4 worth it?
dv wrote:
CG5Addict wrote:
On this topic of upgrading CPU's, is the a way to install a faster CPU in duel 1.8 G5 (2004) tower or a way to hack it to make it faster??
The only guarantee is replacing the motherboard as well.
Agreed. If there were any CPU replacements for the desktop G5s then Other World Computing would be likely to have it (to order, if not in stock). I've scanned their desktop G5 options and there are no CPU replacements for any of them. You might also note that Accelerate Your Mac has this page on CPU upgrades which only has those for G3 and G4 systems, none for G5s; and it has nothing about overclocking G5s here.
Last edited by D'Eyncourt (2009-01-28 6:00 pm)
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#21 2009-01-29 7:49 am
- lord_uranus
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Re: extra cpu for a g4 worth it?
Dual CPU cards in the 1.25ghz range seem to be priced around $120 on ebay. Much cheaper than a mini. (Which is an excellent machine, of course.)
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#22 2009-01-29 3:21 pm
Re: extra cpu for a g4 worth it?
In the past I had a dual 1.25 MDD, while it was an excellent machine but I really didn't notice that much difference between that and my current mac. The dualie did help when it came to running processor intensive apps, but for typical everyday use you really wont notice much a difference
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#23 2009-01-29 7:19 pm
- lord_uranus
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Re: extra cpu for a g4 worth it?
For most applications, my brain and fingers are the real bottleneck. I was just hoping for a bit of a boost with video editing, QT compression, DVD creation, that kind of thing, especially if it's cheap, like $100-150. Kind of like upgrading stock air filter and tires on a car -- not a whole new car but a bit peppier. (A better comparison would be like adding more memory and faster hard drives to an old computer, but I've already done that to my G4.)
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#24 2009-01-30 5:48 am
- Pariah
- James Carville Fan..

- From: Belly Of The Beast, Oklahoma!
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Re: extra cpu for a g4 worth it?
Graphic Autist wrote:
pottymouth wrote:
dv wrote:
...even a Mac mini will significantly outperform a dual G4.
Ayuh.
Yes...but my G4 can hold 4 drives internally. It may be slow, but it can store a lot.
Just my way of justifying things aren't as bad as they seem...
Five drives, not four. You can put one in the open bay under the optical drive. That one is all wired and ready to go with out buying another controller.
Is your Mac maxed out with ram? I would do that before spending the cash on a CPU upgrade.
Last edited by Pariah (2009-01-30 5:51 am)
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#25 2009-01-30 6:07 am
- lord_uranus
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- From: Japan
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- Posts: 167
Re: extra cpu for a g4 worth it?
yeah, 2GB RAM. Again, I'm very happy with the machine, can't believe how well it runs still, but of course any speed boost would be nice.
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