Currently Being ModeratedJan 28, 2013 12:24 PM (in response to LexSchellings)
not this time Lex. I have the right modules, specially for late 2012 iMac, all the right specs. Tech support crucial was like.....uhhhh.....uhhhhh......shoot!
The ones I have in my iMac are: CT3650279
These are the right modules with the specs:
DDR3 PC3-12800 • CL=11 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V • 1024Meg x 64 • Part #: CT3650279
Apple iMac 3.4GHz Quad-Core Intel Core i7 (27-inch, Late 2012)
Still they cause an issue. Will keep you updated on progress with crucial Tech Support
Currently Being ModeratedJan 28, 2013 12:55 PM (in response to McHerb)
Hello McHerb, if it is the correct spec, and corresponds with the data in the Crucial configurator, they will certainly help you (even when not, I think): they have a very good reputation. Normally they take the modules back and send new ones. I have good experiences with Ram and SSD from Crucial.
The spec seems good indeed, as you said, the only thing I am not sure about is the latency CL11, these modules are available with latency 9 and 11.
Do you have the Fusion Drive or the 1TB HDD?
Currently Being ModeratedJan 28, 2013 12:59 PM (in response to LexSchellings)
No complaints on crucial sofar. They are very responsive. I'm already a happy customer for some time of their SSD's.
I have the fusion drive 1TB. For the rest it is the standard 3.4GHz, i7, 27", 8GB
Currently Being ModeratedJan 28, 2013 1:00 PM (in response to McHerb)
My late 2012 iMac (27", quad core i7) has the original memory supplied by Apple, and has sleep issues...
I've run the built-in diagnostic (option-D on startup) and it's found nothing wrong.
Currently Being ModeratedFeb 17, 2013 2:09 PM (in response to Ktulu9876)
My iMac 27" i7 1TB Fusion 16GB RAM (original Apple) has the same issues.
Cant wake with Mouse or Keyboard and when i press the Powerbutton (< 1s) the Mac start like after turned off ...
Currently Being ModeratedFeb 17, 2013 2:44 PM (in response to McHerb)
with help from crucial the problem has been pinpointed to one of the 8GB modules. The other module does not make the iMac crash when coming out of sleep. The malfunctioning module has been send back to crucial by RMA.
I'll post an update when I get a new module from crucial.
Currently Being ModeratedFeb 18, 2013 12:30 AM (in response to Ktulu9876)
When i removed every USB device - connected thru a Logilink 10 Port HUB it still crashes in sleep.
When i removed the Voltage connector from the HUB ... it sleeps well ...
USB without power supply and every HDD, Scanner ... plugged in - it sleeps well ...
It seems that there is a residual current (fault current? Don´t know the right english word) flow "back to my Mac" and kill it while in sleep ...
Currently Being ModeratedFeb 18, 2013 2:25 AM (in response to Ktulu9876)
USB3.0 has to be compatible with USB2.0 ... maybe the 3000€ IMac is not as good as every cheap PC?
at the moment i have a Transcend 4Port USB3.0 hub (with power supply) directly connectet to the Mac and the 10port to the Transcend (without power supply) ...
still it works ....
Currently Being ModeratedMar 3, 2013 11:38 AM (in response to McHerb)
I got a new 8GB module from crucial via RMA. The new module seems to behave fine - no more issues on sleep and wake up. If new issues occur I will reply back to this post. Otherwise, it is closed for me. :-)