Honestly, how fast is a dual G5?

Discussion in 'Macintosh Computers' started by MacTruck, Jun 12, 2005.

  1. MacTruck macrumors 65816

    MacTruck

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    #1
    I am using a powerbook 1.67ghz. I am thinking about getting a dual 2.5ghz G5. How fast is this computer really. Can I hear from some people who own this system? Am I going to be blown away from the speed difference or will it only be slightly faster? Thanks.
     
  2. loib macrumors newbie

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    Apr 25, 2005
    #2
    4x faster on multi-processor aware apps.
    3x faster on average.
    multi-tasking, SMOOOOOTH....
     
  3. 7on macrumors 601

    7on

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  4. wwooden macrumors 68000

    wwooden

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    #4
    If it wasn't faster, what's the point of making the tower and a dual 2.5 G5? I would hope it would be faster, otherwise a lot of people would be very upset for spending the money. You might not notice the speed in small things such as Safari or e-mail and instant messaging, but you will with the big programs.
     
  5. MacTruck thread starter macrumors 65816

    MacTruck

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    #5
    So far the only people commenting on the speed are people with Powerbooks. Does anybody have this machine and has used a powerbook that can comment on the actual noticable speed difference?
     
  6. iGary Guest

    iGary

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    #6
    We just replaced a dual-867 G4 at work with a dual 2.3 G5. I loaded a set of batch actions on the thing and it sliced through them like butter.

    You won't be disappointed.

    Cheers.
     
  7. Macabron macrumors member

    Macabron

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    Durango, México.
    #7
    Well, I dont own a powerbook but I do have a rev. A iMac G5 1.8 and a 1.8 DP power Mac and I can tell you that difference in speed is felt mostly in power apps. Final cut and after effects for example. Render times nearly double in the iMac!! Also I can have safari, after effects, photoshop and illustrator, and itunes running at the same time with out the system slowing down to a crawl! And from what I see in barefeats the 2.5 should be at least about 30% faster than mine. On iDvd it takes about and hour and some to encode and burn a 1 hour dvd! I actually thought it was a long time untill I found out that most people leave it encoding over night!

    Hope it helps.
     
  8. MacTruck thread starter macrumors 65816

    MacTruck

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    #8
    Are you saying that the imac is faster than your dual 1.8 Powermac?
     
  9. Macabron macrumors member

    Macabron

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    #9
    Of course not!!
    Im sorry if my lack of writing skills gave you that impresion.
    The 1.8 DP is of course the faster machine. In a another note I have a dual screen setup (2 x 15"s) and but like the 17" widescreen of the iMac better. I guess I will need to start saving for a 20", I might even will have to settle for dell. :(
     
  10. brendel95 macrumors regular

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    May 23, 2005
    #10
    My dual 2.0Ghz PM G5 is twice faster than my PB G4 1.5Ghz on numerical simulation(Same compiler(gcc4.0) with same option).
     
  11. Chrispy macrumors 68020

    Chrispy

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    Avon, IN
    #11
    WEEEEEEEEEEEEEEEE!

    The Dual 2.0 powermac I used was FAST! I was playing WoW, had web windows open, was folding and I had resources to spare... too bad it pooped out on me. Still one heck of a machine!
     
  12. topgunn macrumors 65816

    topgunn

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    #12
    I don't think your writing skills are the problem.
     
  13. GFLPraxis macrumors 604

    GFLPraxis

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    #13
    I think he meant "nearly double THAN the iMac"
     
  14. _pb_boi macrumors 6502

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    Feb 25, 2004
    #14
    No he didn't. That would make the Power Mac twice as slow to render. He meant what he said; MacTruck picked it up wrong.

    andy.
     
  15. lazyboy922 macrumors 6502

    lazyboy922

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    #15
    It's not even a comparison.

    I just sold my 15" 1ghz powerbook, and upgraded to a dual 2.3 pm. I also installed the 10,000 rpm raptor as my boot drive. The thing flies.
     
  16. y0zza macrumors regular

    Joined:
    Mar 10, 2005
    #16
    Well, I had my new Dual 2.7GHz G5 arrive a week ago. I can't compare the speed to a PowerBook as I don't have one, but moving from a 3.0GHz P4C running Linux (Gentoo) to the Dual 2.7GHz, I couldn't help but be slightly underwhelmed at the speed.

    By all means it's a very fast machine, but not a huge leap from Linux on a 3GHz HT P4 in terms of responsiveness. That said, I haven't put the Mac under much heavy load yet, so I guess it hasn't really had a chance to spread its wings.
     
  17. wordmunger macrumors 603

    wordmunger

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    North Carolina
    #17
    I've used dual 2.0s for regular computing, but never anything serious. Compared to a 1.25 Ghz iMac G4, they don't really seem that fast. Where they really shine is in raw computing horsepower: massive renders, huge multi-layered photoshop documents, gigantic audio files. Then there's no comparison -- the dual G5s blow the iMacs away.
     
  18. Fender2112 macrumors 6502a

    Fender2112

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    Aug 11, 2002
    Location:
    Charlotte, NC
    #18
    The duals are quite fast. In my home office I use a G5 DP 2.0 which sits next to an eMac G4 1.0 that the wife and kids use. There is a world of difference. I think the biggest factors are the bus speed and hard drive speed. The jump from a G4 to G5 also adds a boost. It's like driving a school bus vs a Porche.
     
  19. brendel95 macrumors regular

    Joined:
    May 23, 2005
    #19
    Here is some number I can provide. I ran so called Fast Multipole Algorithm which can accelerate the computation time for matrix time vector. I used only 10 source points to save time (it usually goes up to 100,000). I used gcc with -O3 option for both computer

    PowerBook G4 1.5Ghz, 256+512MB, 15", 49sec
    PowerMac G5 Dual 2.0Ghz, 512MB, 17sec

    Also I used -fast option which available only with G5
    PowerMac G5 Dual 2.0Ghz, 512MB -fast option 14sec


    And Just for fun I tried it on my dell pentium 2.5Ghz with visual c++ complier without any option it took 61sec


    I hope it helps
     

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