MP 1,1-5,1 OWC RAM compatible with 2010 cMP but not 2009 cMP (1066 VS 1333Mhz?)

[tsialex]

That was the odd bit. The last batch I tried from OWC passed hours of Memtest, but still crashed the OS.

ECC corrects some memory errors on the fly, so it's a lot more complex to track some types of RAM errors with memtest86. ASD memory test track some errors that memtest86 can't.

My usual used memory test workflow is:

• run memtest86 for each DIMM alone
• run ASD for each DIMM alone
• run ASD with all DIMMs.

ASD for MP5,1 (and MP4,1>5,1) is Apple Service Diagnostics 3S149.

If I'll find a very cheap 1333MHz i7 socket 1366, 1366 socket i7s don't have ECC support, I'll buy one just for testing RAM.

 

[kazkus]

That was the odd bit. The last batch I tried from OWC passed hours of Memtest, but still crashed the OS.

MemTest86 might not be perfect, but OS can crash not only by memory error but also by another cause.