Mac pro early 2008 memory test

I've had a look around on this specific question, beginning with Apple's installation manuals online, and have no guidance so far, so I suspect there isn't any reason to do things differently. In fact, the new 16 GB upgrade was not recognized right away and I had to swap the two riser cards, top for bottom, to see all the RAM. I've done one round of testing using Rember the GUI for memtest and it has run tests through "Bit Spread" without registering any errors in the 17 GB or so that it is testing.

My inclination is to leave well enough alone, but I am curious as to whether my installation the best for the long run both with respect to heat dissipation and memory access.

mac pro won't recognize memory... sometimes, arrgh

The common confusion is to think that 'a pair' is one stick in the same place on each riser - because that's how the machine shipped when new. How to remove or install memory. By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies.

Home Questions Tags Users Unanswered. Mac Pro 3,1 memory upgrade Ask Question. The pairs on a 3,1 don't work how you'd expect. In short the 2 risers are not mirrors for each pair. OK, research done. You have the best config, afaik. Tetsujin Tetsujin Gosh, I remember that setup - confused me so much early on that I had to save a screenshot of the table on my iPhone as a point of reference!

I then added 4x2GB, which really messed with my head.

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It now has 26GB, errkk Without thorough testing, faults in RAM can go unnoticed until problems start occurring in your system. Adding more RAM to your Mac is one of the easiest ways to increase the capability of the system. By upgrading to at least 4GB or preferably 8GB, you can see a notable decrease in load times for programs and files, especially when you already have a number of applications open.

You may also notice a reduction in slowdowns and the presence of the spinning color wheel, both of which largely happen when applications have to wait for the system to manage memory and prepare it to load the necessary items, instead of being immediately ready to do so.

Do you have bad RAM? How to find it and how to fix it | Macworld

RAM upgrades are one of the few user-serviceable parts on most Mac systems excluding the MacBook Air and early Mac Mini models , and Apple provides step-by-step instructions for the process both in its user manuals and online:. To upgrade your RAM, first locate the instructions for how to do so on your specific Mac model at Apple's support Web site, followed by purchasing the supported RAM upgrade modules for your specific computer. Then perform the upgrade on a static-free surface such as a wooden table, ensuring you regularly touch the computer's case to keep static electricity from building between you and the system, since discharges can harm electronic components.

While in most cases RAM should work fine, sometimes modules can be damaged or otherwise not work properly, and will result in crashes, hangs, or even data corruption when used.

Faulty RAM symptoms

Therefore, when the upgrade is complete and your Mac is reassembled, make it a priority to run a memory test on the new RAM you just installed as soon as you can. Preferably do this immediately instead of booting your system to OS X, since faults in RAM can result in data corruption and other problems that your system would benefit from avoiding.

To test the RAM, boot the system into the Apple Hardware Tests , which on new computers can be done by pressing the power button followed by holding the "D" key held or Option-D to download the tests via the Internet.

I got a Mac Pro! - Mac Pro Early 2008 Overview

On older systems that came with a gray recovery DVD, you may need to insert it before booting with the D key held in order to load the tests. With the testing program loaded, you have two options. First you can simply run them with the default settings; however, this will only do a rudimentary test of your system's RAM. In situations where you need to immediately use your system, this is the best option to take; however, if you have the time, then check the box to run an extended test.

Do keep in mind that the extended tests will take considerably more time than the standard test, and if you have 8GB of RAM or greater, then expect the tests to take a few hours to complete. Memory tests consist of the system reading and writing to the RAM, and performing these operations several times while cataloging successes and failures to see if there are any problems.