Mac pro early 2008 memory riser

Jul 28, I tried swapping the upper and lower riser cards, so that the lower card now contains all the modules and the upper card is empty.

As I see it The logicboard is not recognizing modules in this slot. Either 1 there is an issue with the logic board, or 2 there is an issue with slot damaged levers, loose connection, etc. Jul 29, 5: Those are for MacPro 1,1 Risers. I asssume they won't work but should be easy to navigate up to find parts. Jul 29, 7: The OWC's worked on their own Machine didn't see them when I tried the lower slot. Switching risers still resulted in no joy on the lower slot.

When I split the original modules as in the original installation , only one worked. When I swapped modules, only one worked. When I swapped riser cards, only one worked. All top module only according to System Profiler. Bottom slot shows empty no matter what is installed there. Currently both 2GB modules and both 1GB modules live on the top slot and all are seen by system profiler. I have tried all 4 modules on both risers and they work only when installed in the top slot. You ran AHT and it passed all tests or not? Jul 29, 8: Ran AHT and it found no hardware issues. Started the "extended" check before I left for work and will take a look at it when I get back home.

Still seems like the bottom memory slot is dead, since both risers and all modules work on the top slot but none are recognized on the bottom slot. Communities Contact Support. Sign in. Browse Search.

Ask a question. User profile for user: DrewM DrewM. Mac OS X Speciality level out of ten: When I moved them to slots 3 and 4 of the top riser, I now "see" the entire 6GB.

More Less. Reply I have this question too I have this question too Me too Me too. Helpful answers Drop Down menu. Desktops Speciality level out of ten: Swap them. View answer in context. Early Mac Pro. If you're not sure if you have an "Early " Mac Pro or another model, the A Model Number is insufficient as this identifier is shared by the original Mac Pro models, which use a different type of RAM.

More information about specific identifiers is provided in EveryMac.

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The EMC number is located on the rear of the system in small type. As carefully hand documented by EveryMac. Apple also reports that "DIMMs must be installed in matched pairs.

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. Apple provides a PDF version with photos of these instructions, too. However, perhaps even better, site sponsor Other World Computing also provides a step-by-step video of the process:. However, if you do not feel comfortable -- or have the time -- to upgrade the RAM yourself, professional installation never is a bad idea.

Mac Pro Memory Riser

Just because RAM meets the minimum listed criteria does not mean that it will necessarily function as intended in your Mac. 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.