New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus Advice and insight from world-class Apple enthusiasts Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Switcher Hangout The place for switchers to discuss their new machines, and how to work with OS X. General support can be had here for newbie stuff, like "How do I restart my new iMac?" :)

Can up add another processor to the Single G5?


Post Reply New Thread Subscribe

 
Thread Tools
mmoy

 
Member Since: Mar 05, 2005
Posts: 282
mmoy is an unknown at this point

mmoy is offline
Can I just add another G5 to my single-CPU PMac G5 in the future?
QUOTE Thanks
Mr Bobbins

 
Mr Bobbins's Avatar
 
Member Since: Jan 29, 2005
Location: Legoland
Posts: 790
Mr Bobbins has a spectacular aura about

Mr Bobbins is offline
That would involve buying a processor upgrade card and no such card is available at the moment but it's possible that one comes out in the future.

I'm also not sure if it will be possible to upgrade a single machine to a dual ? that might not be possible.
QUOTE Thanks
trpnmonkey41

 
Member Since: Jul 22, 2003
Location: Hamilton College
Posts: 6,999
trpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to beholdtrpnmonkey41 is a splendid one to behold
Mac Specs: 20" iMac C2D 2.16ghz, 13" MacBook 2.0ghz, 60gb iPod vid, 1gb nano

trpnmonkey41 is offline
It would need a whole new logic board if it was even available

Don't forget to use the new User Reputation System
QUOTE Thanks
James

 
James's Avatar
 
Member Since: Nov 27, 2004
Location: Pocola, Oklahoma
Posts: 808
James is a jewel in the roughJames is a jewel in the rough
Mac Specs: Mac Pro 2.66 - 4 Gig Ram, iMac G5 2 Gig ram 20"

James is offline
Quote:
Originally Posted by mmoy
Can I just add another G5 to my single-CPU PMac G5 in the future?
Simple answer is NO... you would need a whole new motherboard for dual processors.

Mac Pro Intel 2.66 - 4 Gigs Ram - 10.6.1 - 30" Apple Monitor
iMac 24" 2 gigs ram - MacBook Pro
QUOTE Thanks
Avalon

 
Avalon's Avatar
 
Member Since: Jun 25, 2004
Location: Luxemburg, Europe
Posts: 1,779
Avalon is just really niceAvalon is just really niceAvalon is just really niceAvalon is just really nice
Mac Specs: PowerMac G5 Dual 2GHz (June 2004), 2.5GB, Airport, black 5G iPod 30GB, white MacBook 2.0 2GB

Avalon is offline
The actual single 1.8GHz is a whole different motherboard than the dual, and it's not possible to add a second one.

The older single 1.6GHz and 1.8GHz have the same board layout than the dual. When you open it you can see the space for the second CPU simply being free.
Unfortunately, Apple did not put the 2nd CPU Connector on those boards, and surely other electronics are missing for it too...so even on those models it is not possible to add a second CPU.

Unlike the dual G4, the dual G5 does not share 1 bus with 2CPUs, but simply each CPU has it's own bus and memory access. therefore I really doubt that there will be any such upgrade. And AFAIK, the actual single 1.8GHz has it's CPU soldered on the board, not sitting on a daughterboard like the others...
QUOTE Thanks
mmoy

 
Member Since: Mar 05, 2005
Posts: 282
mmoy is an unknown at this point

mmoy is offline
Thanks for the information. I was just curious about it. Macs appear to be an expensive hobby.
QUOTE Thanks
Mr Bobbins

 
Mr Bobbins's Avatar
 
Member Since: Jan 29, 2005
Location: Legoland
Posts: 790
Mr Bobbins has a spectacular aura about

Mr Bobbins is offline
So you'll never be able to upgrade the processor on a G5, wow !! :bomb:
QUOTE Thanks
mmoy

 
Member Since: Mar 05, 2005
Posts: 282
mmoy is an unknown at this point

mmoy is offline
Quote:
Originally Posted by Mr Bobbins
So you'll never be able to upgrade the processor on a G5, wow !! :bomb:
That's actually a different question. And actually an interesting one.

My original question was can I add another processor and the answer seems
to be no short of a change in motherboards and maybe some other stuff.

Upgrading the processor is different question altogether.

One other question would be: can I overclock this thing? With $100 processors,
that's an interesting question as frying the thing isn't expensive. With $500
processors, the question becomes a little heated.

I don't recall seeing any Mac comments on http://forums.extremeoverclocking.com/index.php? but I'll check anyways.
QUOTE Thanks
Mr Bobbins

 
Mr Bobbins's Avatar
 
Member Since: Jan 29, 2005
Location: Legoland
Posts: 790
Mr Bobbins has a spectacular aura about

Mr Bobbins is offline
I was responding to what Avalon said about the CPU being soldered to the board and not the daughterboard, I mean if this is true then it's going to make a processor upgrade very expensive.
QUOTE Thanks
James

 
James's Avatar
 
Member Since: Nov 27, 2004
Location: Pocola, Oklahoma
Posts: 808
James is a jewel in the roughJames is a jewel in the rough
Mac Specs: Mac Pro 2.66 - 4 Gig Ram, iMac G5 2 Gig ram 20"

James is offline
Quote:
Originally Posted by mmoy
Thanks for the information. I was just curious about it. Macs appear to be an expensive hobby.
No not at all, Macs are not a hobby, there a passion!! and passions have no limit as to costs....(G)

Mac Pro Intel 2.66 - 4 Gigs Ram - 10.6.1 - 30" Apple Monitor
iMac 24" 2 gigs ram - MacBook Pro
QUOTE Thanks
FishStickBoy
Guest
 
Posts: n/a

Not only would you need a new mother board. You would also need a new power supply.

The single proccesor power supply will not power the dual proccesor G5's.
QUOTE Thanks
Avalon

 
Avalon's Avatar
 
Member Since: Jun 25, 2004
Location: Luxemburg, Europe
Posts: 1,779
Avalon is just really niceAvalon is just really niceAvalon is just really niceAvalon is just really nice
Mac Specs: PowerMac G5 Dual 2GHz (June 2004), 2.5GB, Airport, black 5G iPod 30GB, white MacBook 2.0 2GB

Avalon is offline
Quote:
Originally Posted by Mr Bobbins
I was responding to what Avalon said about the CPU being soldered to the board and not the daughterboard, I mean if this is true then it's going to make a processor upgrade very expensive.
For the soldered one (which, for the moment, means iMac G5 and the recent PowerMac G5 single 1.8) upgrading the CPU is not an option...simply buying a new one would be more reasonable and cheaper.

But the older singles (1.6 and 1.8) are not soldered, and could take a faster CPU. The only problem is that G5s don't get their speed in the same way than other CPUs (including G3, G4, AMD and Intel).
The other systems all have an FSB that's somewhat slow compared to the CPU speed, and the CPU gets it's clockspeed by multiplying the FSB. This means you can put in a CPU that get's multiplied higher, and thus runs faster. Overclocking a CPU is nothing else than setting that multiplier to higher settings.

Now the G5 is a whole different story...it's FSB is much higher (depending on the model, half or a third of CPU speed), and it is different between the different PowerMacs. The dual 1.8GHz has a 900MHz FSB, while the dual 2.5GHz has a 1.25GHz FSB. That means even if you would put the 2.5GHz CPUs in a dual 1.8, they wouldn't run faster at all. The G5s with soldered CPU have a slower FSB (single 1.8GHz has 600MHz FSB), but even here it's the same rule. The difference between the iMac 1.6 and the 1.8 is the higher FSB, so interchanging CPUs wouldn't change anything (and would require some extremely good soldering skills too).

I don't know in which way the G5 multiplier works, but as the FSB is much higher, overclocking isn't really an option. For example, if you take the dual 2GHz, it has a 1GHz FSB, so it's a 2x multiplier. Now setting this multiplier to 3x would, theoretically, boost the CPUs to 3GHz. The big problem here is that overclocking is nothing else than using the CPU manufacturer's tolerances, which are limited, of course. No CPU can take such a high speed increase, except with some highly sofisticated cooling solutions (water cooling would NOT be enough).

Another option would be to overclock the FSB, but this is not recommended...it would overclock your whole system, and chances are extremely low that it will run stable. When you overclock the CPU you only play with one component's tolerances, which works as long as you don't exceed the CPUs limits. But on the whole system are many different parts, that each have their own tolerances and limits. This also includes extension cards like PCI or video card, which would be overclocked too. That's why increasing the FSB in a significant way would surely not work, and probably make your system useless.
QUOTE Thanks
Mr Bobbins

 
Mr Bobbins's Avatar
 
Member Since: Jan 29, 2005
Location: Legoland
Posts: 790
Mr Bobbins has a spectacular aura about

Mr Bobbins is offline
Thanks Avalon for clearing that up for me.

Didn't expect the Imacs to be upgradable but then the nice thing about the iMacs is that you can afford to replace them every once in a while, I expected a lot more upgradability with the Powermacs as this is one of the reason why I'd buy one.
QUOTE Thanks

Post Reply New Thread Subscribe


« server and g3 | Access Folder Question »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
Who's switched to 1.8 GHz single processor Power Mac G5? djmitch Switcher Hangout 9 03-24-2005 11:00 PM
PowerMac G5 1.6 Ghz vs. single 1.8Ghz Rosaget Apple Desktops 1 01-20-2005 05:32 AM
How to add attachments sivp Schweb's Lounge 4 11-20-2004 10:15 PM
Performance Monitor - Upgrade Card - Dual vs Single thinkbible Apple Desktops 1 08-13-2004 06:10 AM
Dual 1.8 G5 vs Single... orionmg Apple Desktops 7 01-20-2004 06:55 PM

All times are GMT -4. The time now is 04:32 PM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?