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Thread: Lightroom - 100% CPU Usage

  1. #1
    New Member
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    Nov 2007
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    Lightroom - 100% CPU Usage

    I have Windows XP with service pack 2 on a Pentium 4, 2.4' GHz, 2 GB RAM computer. I am planning on migrating to a Mac Pro and would like to ensure that it is configured to perform for Lightroom and Photoshop.

    When Lightroom performs the following functions, the Task Manager on my current computer shows 1''% CPU Usage:
    • Lightroom Develop, click on an image "loading" message & 1''% cpu
    • Lightroom Upload
    • Lightroom Export
    • Lightroom Library, full screen mode: click on filmstrip to see an image
    I'm thinking that if there were additional CPU resources, then the performance would be better. I am under the impression that the CPU Usage relates to the processor. Which of the following configurations on a Mac Pro do you think would be able to process Lightroom & Photoshop without being at 1''% CPU Usage (and as a result slow):
    Two 2.' GHz dual core Intel Xeon
    Two 2.66 GHz dual core Intel Xeon
    Two 3.' GHz dual core Intel Xeon
    Two 3.' Quad core Intel Xeon

    Or, am I off track and there is another solution?

    Thanks very much!

    Margie

  2. #2
    Member
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    Acworth, GA
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    Experience
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    Primary OS
    Windows 7 64-bit
    Memory
    24 Gb
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    4
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    ATI
    LR Version
    5.3
    Camera
    Nikon
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    Lightroom - 100% CPU Usage

    Margie, I wouldn't worry. I'm not a Mac user but I can't get LR to do more than spike my Core2 2.4G(OC to 2.8 )to 9'% on rare occasions. Any of the Macs you listed should be more than adequate as far as processor power is concerned.
    [size=8pt]My Gear: Nikon D300, D200, FT-3, F-FTn, too much glass and misc. stuff to list[/size]

    [size=8pt]"They were curious about what he might be doing standing in a river waving a stick" Jim Harrison, Farmer[/size]

  3. #3
    Adobe Representative
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    Lightroom - 100% CPU Usage

    Any of those would work. You will see processor spikes from time to time, as LR (and ACR) will use as much processor power as it can to do things like render previews.

    For LR performance, a fast hard drive and a bunch of memory is just as important as processor speed.
    Melissa Gaul

    Lightroom Person

    Adobe Systems

  4. #4
    Junior Member
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    Oct 2007
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    Lightroom - 100% CPU Usage

    Hello,

    Even when doing a bunch of previews or other intensive process I've not seen LR get above 6'% on my system. (dual 3.' quad core)
    -------------------

    Steve

    www.finesart.com[/url]



    mac osx, dual quad core, 8gb ram, fast drives, LR1.3.1, Canon photo gear[/SIZE]

  5. #5
    Member
    Join Date
    Oct 2007
    Location
    Acworth, GA
    Posts
    191
    Experience
    Advanced
    Primary OS
    Windows 7 64-bit
    Memory
    24 Gb
    CPU Cores
    4
    Video Card
    ATI
    LR Version
    5.3
    Camera
    Nikon
    File Format
    Raw
    Printer
    Epson

    Lightroom - 100% CPU Usage

    Quote Originally Posted by melissa;375'
    For LR performance, a fast hard drive and a bunch of memory is just as important as processor speed.
    Good point, Melissa. My catalog sits on the RAID ' Raptors and the image files on the RAID 1 array, never thought about it before.

    So, Margie, I'll go out on a limb and suggest spending more on the drive systems and less on the processor. Two 2G or 2.66G dual-core Xeons should be plenty fast for processing but you have to get the data on and off the disk as well. The problem is that Stevie J thinks well of his hard drives and prices them accordingly.

    Personally(and your mileage may most definitely vary) I've been a big Apple fan since the Apple II came out, but I've never been able to justify the cost over a comparable Windoze/Intel machine as far as performance goes. In the early days of the Mac they were the most advanced machine around. But Intel and Bill Gates caught up and now, IMHO, Apple is preaching to the choir. Just an aside, and most definitely MHO.....

    Anyway, HTH and good luck with your new machine!



    TIA
    [size=8pt]My Gear: Nikon D300, D200, FT-3, F-FTn, too much glass and misc. stuff to list[/size]

    [size=8pt]"They were curious about what he might be doing standing in a river waving a stick" Jim Harrison, Farmer[/size]

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