From a question on Super User :.
Replacing/Upgrading Mac Pro Processors (Early 2008)
Many times, I've found that mixing RAM speeds sometimes causes system instability. I've had plenty of cases where RAM sticks that tested just fine alone wouldn't play well together. So I strongly recommend that all of the RAM installed in your computer be of the same speed. I need to fiddle with the RAM and see why I am not getting those speeds right now, as I had been earlier.
What ever the slowest memory is in the computer is what the Mac will run all the memory at. So if you have MHz memory and mix them, all of it will run at MHz.
Replacing the memory is the only way to get the speed increase. I eventually went with the MHz RAM, because I expect my own computer to know what's actually in it more than I'd trust external programs or websites.
So far everything seems to be okay. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.
Installing Ram in Early Mac Pro | MacRumors Forums
Which memory speed for an early Mac Pro? Ask Question. Be sure to buy from a quality vendor that has tested their RAM with the Mac Pro to ensure full compatibility. The company provides flat rate shipping to France, Germany, and Switzerland and inexpensive shipping for all of Europe, too. In Australia, site sponsor RamCity sells Mac Pro compatible memory with a lifetime warranty and fast, flat-rate shipping Australia-wide.
In Southeast Asia, site sponsor SimplyMac.
Hosted by site sponsor WebMate. RAM Upgrade Instructions Detailed information is printed on the inside of the door of the Mac Pro, and this is likely to be sufficient for many users. If this happens, shut down your Mac Pro, verify the module specifications against the requirements listed above, and repeat the memory installation instructions to make sure the modules are installed correctly. If you still have issues, remove the memory and consult the support information that came with the memory, or contact the vendor who provided the memory.
Mac Pro Mid and earlier : How to remove or install memory Learn how to remove memory from or install memory into your Mac Pro computer Mid and Earlier. Click More Info. Select Hardware from the Contents list. Find "Number of Processors" under Hardware Overview.
Installing Ram in Early 2008 Mac Pro
Removing or installing memory. Wait 5 to 10 minutes to allow the internal components of your Mac Pro to cool. Touch the metal on the outside of your Mac Pro to discharge any static electricity.
- keyboard shortcut mac section symbol.
- hp laserjet pro cm1415fnw software download for mac.
- Choose your model!
- Mac Pro Memory Installation Problem: Missing RAM in certain slots - Server Fault.
- can you install mac on windows pc.
Unplug all the cables and the power cord from your Mac Pro. Hold the side panel and lift the latch on the back. Remove the side panel by pulling the top away from your Mac Pro and lifting up. Pull the latches until they open all the way and release the processor tray. Remove the processor tray and lay it on a soft, clean cloth on the desk or work surface, to protect the tray and avoid scratching the work surface.