Ever had a stable G5 with 8 gig of RAM?

Has anyone ever had a G5 run nice and stable with 8 gig of RAM?
I have purchased 16 gig in memory and tried every stick independently and they are all good. BUT put 8 gig in the machine and its unstable. Remove the last two mem slots and stability returns.
I now know my G5 has a hardware problem. It sometimes shows up as a 7 gig memory machine in "About this Mac" and "More Info" shows that the system reads the last two slots as 512 K rather than 1 gig modules. (Not first up but after a short while)
Its my belief that this is more than just my machine. Pieter

http://search.live.com/results.aspx?q=Applereset+nvram+openfirmware
http://support.apple.com/kb/TS1812
Q: *I want to reset NVRAM to factory defaults. How do I do that?*
A: When you start a Macintosh computer you can reset the configuration variables by holding down the following keys, "command-option-p-r", without the quotes. Listen for the second boot beep before releasing the keys and the configuration variables will be reset. When a Macintosh computer starts, control is immediately given to what Apple terms "Hardware Init". This firmware is contained in ROM and must use the microprocessor registers since memory is not tested and initialized.
When you hear the boot beep Hardware Init is finished testing and initializing memory and the microprocessor and passes control to Open Firmware. Open Firmware checks for keys being pressed. In this case, command-option-p-r, is detected and Open Firmware resets NVRAM and then passes control back to Hardware Init which will generate another boot beep. Don't worry if you hold down the keys too long and hear more than two boot beeps. More than two boot beeps will just reenter the startup sequence more times which will not cause any harm.
http://devworld.apple.com/qa/qa2001/qa1103.html
I would reset nvram each and every time I changed device configuration. Also, test with just new RAM alone. Sometimes RAM does get misreported as to its type/speed (PC2700 showed as PC2600 in G4 MDD) and just "cosmetic" and didn't affect operation.
Running memtest is one way; Apple Hardware Test another. If those two pass, I would not worry.

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  • I am feeling so ripped off right now. I have wanted a Mac for years and believed the hype about it's stability and I have had more trouble with this Imac 2011 than I have ever had with a pc. It locks up with several software products from APP store.

    I am feeling so ripped off right now. I have wanted a Mac for years and believed the hype about it's stability and I have had more trouble with this Imac 2011 than I have ever had with a pc. It locks up with several software products from APP store. I have already had to have a technician to look at it and really couldn't figure out what the deal was.  I was told that the APP store software should give me no problems but the truth is that it locks up on the software. This machine is only 4 weeks old and I am using 37 g on a 1 T hard drive. There is no reason for it to be locking up. Also, when I try to use the help program, it always tells me that I am not connected to the internet even though I have used both the mail program and the browser with no problem just before that. I successfully used the help program on my pc lots of times. I did not need a $2000. plus machine to just get email. I just wanted to unload on somebody that might understand my pain and after checking out this site...I think there is a few of you out there.

    I was told that the APP store software should give me no problems but the truth is that it locks up on the software.
    The apps downloaded from the Mac App Store are written by third party developers, not Apple. If you have problems  with those apps you need to visit the support area for their websites. Launch the App Store, locate the app name. You should see a support link.
    when I try to use the help program, it always tells me that I am not connected to the internet even though I have used both the mail program and the browser with no problem just before that
    Go to ~/Library/Preferences. Move the com.apple.helpviewer.plist file from the Preferences folder to the Trash. Restart your Mac, try the Help menu.
    If you need help finding that file, hold down the Finder icon in the Dock then click: New Finder Window. From the menu bar top of your screen click: Go > Go to Folder. Type this in exactly as you see it here:   ~/Library/Preferences/com.apple.helpviewer.plist    That will take you right to that file.
    (.plist) files stores information about a particular app or in this case, the Help viewer. Often times deleting the .plist file resolves the issue.
    It's fine to "unload"... we understand that you expect your iMac to be stable but there are times when things go awry. That's why we have these forums so that you can you get help.
    You may want to read up on how to repair the disk if necessary or reintsall Lion >  OS X Lion: About Lion Recovery
    Apple - Find Out How - Mac Basics
    How to "switch" from PC to Mac >  Apple - Support - Switch 101
    I'm sorry you feel, "ripped off", but you are using the world's most advanced operating system and it may take some time to adjust to a new OS.   http://developer.apple.com/technologies/mac/

  • Does Verizon ever provide a different model phone if the customer has basically had the same issues with 3 prior 'replacemet' (refurbished) phones?

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    sheritah_vzw
    Follow us on Twitter
    @VZWSupport

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  • [solved]Anybody ever had a problem with a case making it difficult to charge?

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    Richard,
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  • APPLE Customer service best I've ever had. ANYONE ELSE AGREE

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    I've been an Apple customer since my first Mac 512KE, which was upgraded to a Plus. <G> That was back in the '80s. I've never had a negative experience with Apple support, whether in the Store or on the phone, and I've had several truly great experiences with techs who went far above and beyond to help me. On the two occasions when I've had to send my Mac away for service, Apple has sent a FedEx prepaid box to my home within one day. The computer went from my home in Nevada to Tennessee for service and was back within 48 hours.
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  • Hey, I had met a problem with installation. Can any one help me?

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    Re: Hey, I had met a problem with installation. Can any one help me?
    This worked for an English version and the concept should work with all Adobe programs - new or old (hopefully in any language). My guess is that you have/had an older version of Acrobat/Reader on your computer hard drive that needs to be *completely* removed first. Uninstall the new (and any old) Acrobat; then try using the "kb2..." guideline link below before reinstalling the new Acrobat. I am including the lengthy instructions in order to help others with more extensive installation problems. Good luck!
    I live on a fixed income and use CS for a hobby. I had problem installing Adobe Creative Suite (CS1) to Windows 7 64-bit Pro on my new computer. Also installed Adobe Photoshop LR3. What I learned: All Adobe products (Flash, Acrobat/Reader, Photoshop, Creative Suites, etc.) leave a VERY pervasive footprint on your hard drive. Logic finally worked for me.... think of building a house; there is an order you have to do things in. First, you have to clean the area before laying the foundation; then you have to build the framework before you put the roof on. You cannot install an older program over ANY newer program; and you will sometimes have a problem installing a newer program containing Flash, Reader, etc. unless you "erase" the older versions of Flash, Reader beforehand. If installing older programs, do a Custom/Manual install; do not install older versions of Flash, Reader, etc.  packaged with your Adobe software.
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    Completely and meticulously eradicate (clean) your hard drive of ALL Adobe programs [uninstall, remove remaining folders, and remove only the registry entries that have the Adobe name attached (unless you are an expert and fully understand the other entries)]. Use this as a guideline  http://kb2.adobe.com/cps/400/kb400769.html
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  • Why does the top button always brake why as my screen decided to pop off why is the back of my case bending when I have never dropped it why dose this shity phone keep sending text messages as picture messages this is the worst phone av ever had!!

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