Mac Pro runninng Lion. AHT and memtest disagree on memory
The essential is in the title. Some months ago, I gave Apple Hardware Test a run from my Intallation disk . My Mac Pro is an early 2008, with 24 GB memory, an eSata II PCI card and an USB3 PCI card. I diconnected all peripherals, as requested, but didn't plug out the PCI cards. The A H T gave a general satisfecit , except for an obscure Memory error.
I must confess that the memory is a mix of Apple and 2 other providers (one being Crucial) . Obviously another test , specific to memory, had to be done.
I used the latest version of memtest in Single User Mode. Memtest correctly locked the memory and checked the maximum allowable ( about 22,5 GB)with three passes. Everything was three times found OK.
Which test is right ? IMHO Apple Test Is the culprit , at least as far RAM is concerned.
Moreover it is of little value as it does'nt explain what exactly it finds wrong with the memory
Francois Joly
Mac Pro, Mac OS X (10.7.4)