might want to use apple diagnostics to check 16GB upgrade
I just bought a Crucial 16GB kit to put in a brand new 17" 2.5GHz QC MacBook Pro purchased 10FEB12.
The system boots up and runs with no noticeable problems even with a couple of VMs running, but if I run Diagnostics from Lion (Hold down "d" while booting), then run the "extended" test. The memory test fails every time. So if you have one of these and have upgraded it and can run the extended diagnostic test successfully, I would really appreciate knowing.
Crucial has been very cool about it and sent another pair of 8GB sticks out. As "stand-up" as that is, if the machine continues to fail the extended test, even though each stick checks out OK solo, that will stink like a bad squirrel fart. Crucial said they have sold a bunch of these and have them working in this model MBP. We shall see how things go for me...
Anyhow, the MBP is at 14 days from purchase and I have dropped the Apple Store where I bought it an email. I think they will step up and make things right and swap the unit out. The AppleStore at NorthPoint Mall in Atlanta works pretty hard to do right by their customers... We shall hope and see...
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro8,3
Processor Name: Intel Core i7
Processor Speed: 2.5 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 16 GB
Boot ROM Version: MBP81.0047.B24
SMC Version (system): 1.70f5
Serial Number (system): blahblahblah
Hardware UUID: yhadaYahdaYhada
Sudden Motion Sensor:
State: Enabled
------01MAR12 update----------
OK, so here's the update...
I sent the first 16GB back to Crucial, the RMA default is what they call "Wait To Recieve". This means they hold sending out the replacement until the old one arrives back to them from you. I called them and they changed the RMA to be "Advanced Placement" which means they hit your credit card for the price of another 16GB kit, but send out another immediately one so you get the benefit of using the old RAM until the new RAM is at hand. I wanted "Advanced Placement" b/c I only had 4GB of with the new MacBook Pro and its just not enough to keep me from swapping all the time. Also since the 16GB kit was working fine in that I had no crashes (just failing diagnostics), I wanted to keep using it. Crucial was easy to work with and updated the RMA type with a simple phone call and the new 16GB kit was scheduled to arrive two days later.
Right after talking with Crucial I called the Apple Store that's about 45minutes from my house and told them that I was concerned and would feel better if they switched out the unit for another one before my 14days after purchase time period had expired (I was on my last day). They were very cool and were as concerned that I wasn't happy as they were about nailing me to the wall on the gory details regarding why. We did talk about the unit failing memory tests, and though they offered, they didn't force me into the store to sing Kumbaya at the Genius Bar. Though it would not have helped me in this case, I think it would have been a reasonable request from them. Its worth mentioning that I've purchased I fair number of laptops for businesses through them over the last five years. Anyhow before returning the unit, I put the original 4GB of RAM back in it.
The first thing I did with the new MacBook Pro was to put the original 16GB kit in it and run the Lion diagnostics again (hold "d" when powering on the unit.) The RAM kit failed in exactly the same way (hex address) as the first MacBook Pro. At this point my guess was the RAM was bad, but I supposed there was an outside chance it could have been something about the memory controllers on the new 17" models and 16GB kits. Slim chance, but plausible considering Apple's stance on not supporting 16GB.
Anyhow the replacement Crucial 16GB kit came the next day and I swapped it out with the original, ran the tests and they failed again. I sent Crucial an email asking for an RMA and they provided me one, so the second kit is on its way back now.
Next I ordered a 16GB kit from OWC (
http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/DDR3_1333MHz_SDRAM). It was priced a bit higher, but after all the time burned on the Crucial kits I figured "whatever lets just see this through."
The OWC kit came yesterday and I put it in before going to bed and started the extended memory check in diagnostics. This morning it checked out fine, no errors.
My conclusion is the 17" MBP (at least the 2.5GHz quad-core processors) are *very* picky regarding RAM. Many folks have reported Crucial sticks work in their boxes. No question you wont have a problem with their customer service. Its spot on. In my experience however, going through two of the Crucial kits in two different new MacBook Pros, something about the late 2011 17" MBP 2.5GHz quad-core and the 16GB kits from Crucial don't seem to mix very well.
Even though I never experienced a crash using the Crucial memory, I never really pushed the systems hard enough to make them start swapping either. That's why I went for 16GB to start with anyhow.
Hope this helps somebody.