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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > Duals vs. Single

Duals vs. Single
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May 22, 2004, 11:09 AM
 
Sorry if I'm repeating this question.

I have the oppurtunity to get a dual 1.8 G5 at a good price. However I've been waiting for the next revisions of the G5 to come out (hopefully just about 6 weeks to go). My question is if Apple releases a single 2.2 (or similar rating) will the dual 1.8 be faster or slower. I would think the dual would still be faster. Let me know your opinion. I do software development and the faster machine would really help me out.

cheers, scott
     
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May 22, 2004, 12:24 PM
 
A dual 1.8 would definately be faster than a single 2.2. That is assuming everythign else stays similar.
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May 22, 2004, 12:27 PM
 
A dual would be faster assuming the application you are using is multi threaded.

However, this is a moot point about a 2.2ghz single as this machine doesn't exist... unless you know something we don't
     
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May 22, 2004, 02:56 PM
 
One thing thats great with duals is that you get the feeling that multitasking won't effect backround processes because the monitor shows your rarely using both to full capacity so you can leave a process going and play a game and it wont slow it down that much because (at least on my machine) a program rarely uses both processors over 50% together.
     
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May 23, 2004, 05:07 AM
 
Originally posted by The Placid Casual:
A dual would be faster assuming the application you are using is multi threaded.

However, this is a moot point about a 2.2ghz single as this machine doesn't exist... unless you know something we don't
But usually there is a rule of thumb about the scaling of CPU speeds: a 10 % increase of MHz (or GHz) results in often around 5 % of additional performance.

A second CPU just helps OS X to distribute the load of the OS (QE, services such as network, etc.) onto two CPUs, so (unlike in OS 9) a second CPU will help even if the app doesn't support SMP.
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May 23, 2004, 06:31 AM
 
I'd take a DP 1.8 over a single anything thats expected out of Apple/IBM at this point.
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May 23, 2004, 09:40 AM
 
Maybe we will se powermacs´s with four processors? But that would mean a lot of heat. And who needs that kind of speed. :-)
     
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May 23, 2004, 10:46 AM
 
Originally posted by Cadaver:
I'd take a DP 1.8 over a single anything thats expected out of Apple/IBM at this point.
Ditto, any time.
I don't suffer from insanity, I enjoy every minute of it.
     
   
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