[X4U] Bad ram

[Robert Ashton]

Try cleaning the ram contacts (where the ram goes into the ram socket) using a pencil eraser. Eraser should be soft and not gone hard. What happens is over time there will be oxidation build up thus causing a poor contact. As you do this you will notice a change in the color of the contacts. If it is third party ram it could be under warranty as none apple ram can have lifetime warranty. Hope this helps. Email me if you have any questions.  Bob 
On 2012-03-08, at 3:38 AM, Paul Moortgat wrote:

> I got 2 GB ram when I bought the Mac Pro.  I added 4 sticks of 2 GB to get 10 GB.
> I now suddenly found out that I had only 4 left in the second Riser.
> I opened the Mac and moved the 2 1 GB sticks from Apple to place 3 and 4 of Riser A.
> I moved the 2 2 GB sticks from 3 and 4 to 1 and 2 and now I've 8 GB ram.
> The 2 1 GB sticks from Apple show empty in the System Profiler.
> I'll remove them later. The Mac is out of warranty.
> 
> Paul Moortgat
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