01-22-2013 02:09 AM - edited 01-22-2013 02:10 AM
I had an occasional problem like that with 16gb, fine with 8gb or less, even though all memory test pass with no problems, there must be some type of compatibility problem with the Z580, most likely due to the bios as motherboard and cpu support 8gb per slot.
make sure you have the latest bios update.
01-22-2013 02:22 AM - edited 01-22-2013 02:25 AM
The bios is most likely the entire reason you are having problems, the the Z580 is not certified, meaning lenovo has not tested it with 16gb
As i said my Z580 runs OK, not perfect with 16GB the occasional boot problem, no bsod or any problem in windows, and i have run the lenovo memory test with 16gb and it passed with zero errors.
Have you tried swapping the 8gb so-dimms around, you might have a bad contact.
01-22-2013 02:51 AM
01-22-2013 05:55 AM
I returned the memory, spec sheets of the z580 say 8 gb is the max capacity. Haven't tried 8+4 but couldnt that cause instability problems due to different size+brand?