Questions about PowerMac G5

Discussion in 'PowerPC Macs' started by MacintoshMaster, Aug 1, 2011.

  1. MacintoshMaster, Aug 1, 2011
    Last edited by a moderator: Aug 1, 2011

    MacintoshMaster macrumors 6502


    Jan 16, 2010
    Hi there,
    I have just bought of ebay a powermac g5 dp 1.8Ghz 4GB ram for £180. I am using this for DAW. Before I was using a iMac G3 but was a little slow. I have looked all over the internet but can't find the measurements of the fans in the PMG5. Please could someone tell me! Also, what are PCI-X? Will normal PCI cards fit?

    It does not come with an OS and I have leopard and tiger CD's. Which would run better/faster? The programs I will be mainly using are garageband and Logic Pro 8!

    If I buy a SATA III or SATA III will it work?
  2. mabaker macrumors 65816


    Jan 19, 2008
    Leopard all the way. Just give it 2 GB of RAM.
  3. reddrag0n macrumors 6502


    Oct 1, 2007
    The fans in a powermac G5 are as follows.

    PSU has 2 - 60mm fans blowing into it.

    The front intake fans are either 1 or 2 80mm x 25mm fans (depending on model)

    rear fans are 2 - 92mm fans (2005 G5 are 2 - 92mm x 25mm)

    PCI fan is a 80mm fan

    hard drive bay is an 80mm fan and a side turbine fan that draws air from the back of the logicboard.

    As for PCI/PCI-X, yes, regular 32 bit and 64 bit cards will fit.
    Reason why thay call it PCI-x is because the slots can handle 100 & 133MHz clocked pci cards.
  4. h0ser81 macrumors newbie

    Jul 17, 2011
    Williamstown, PA
    Nope, SATA 3 drives will only work if it's capable of being jumpered down to SATA 2 speeds.

    SATA 2 drives should work with no problems. I'd just look for a SATA 2 drive.
  5. MAC MAN JW macrumors 6502


    Jul 12, 2011
    I say OS X Leopard to. i run it on my G5 dual 1.8 with 2GB RAM and it is super fast!:)
  6. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    SATA 6Gb/s is backwards compatible and will work with any SATA revision, even 1.5Gb/s.
  7. reddrag0n macrumors 6502


    Oct 1, 2007
    I took another look at the fans for the G5. The front intake fans aren't 80 mm, they are 92mm fans, just like the ones for the rears.

    Looking at a set now and they are 92mm Delta triblade fans.
  8. Jethryn Freyman macrumors 68020

    Jethryn Freyman

    Aug 9, 2007
    Faster than normal PCI. Normal PCI cards won't fit.

    Leopard 100%. Better than Tiger and every way. On a fast G5 you may even get a slight performance boost. It's only really with slower G4s that going to Leopard from Tiger would cut away performance much.

    From what I've read, SATA III is NOT backward compatible with the original SATA I, unless you can set the jumpers correctly on the drive.
  9. csiguy macrumors newbie


    Aug 4, 2011
    PCI-X is backward compatible with PCI 2.0.

    However, installing PCI cards into a PCI-X backplane can have issues (related to channels, voltages, and bus speeds which is another topic), the PM PCI-X is a mixture (1x133 2x100).
    If there are no additional PCI/PCI-X cards installed the issues are usually minimal.
    Of course the card must be supported under OSX as well.

    It would be best to ask about the specific card before just plugging it in.

    Also see:

    Your source was not accurate.

    Many SATA II and SATA III drives will correctly run on a SATA (I) interface.
    Some drives include a jumper for compatibility (proper device detection), other drives will simply not work (typically due to large formatted size or command/speed issues).
    It is best to check the exact make and model to see if other Mac users are successfully using it.

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