The ram is working fine so the question is not 'is this the correct ram for my computer,' rather, the question is 'will apple consider this to be OEM ram if I ever take my Mac Pro in for service.
I was wondering if someone knew who the various Apple oem ram companies were out there and could tell me at a glance if hynix is one of them.
As stated in my previous post (just posted), the modules are Apple modules.
But, Apple will not consider them to be OEM RAM in regards to your warranty.
Your computer is specifically marked on it's label (look under the foot) with the modules that came in your system. So, the machine is basically labeled to indicate what it came with (though not brand specific). So, any memory that you add to the machine will always be looked at as if it is 3rd-Party memory.
Your warranty will not extend to these modules since they didn't come with your machine. And, likewise, if those modules were to cause damage to your machine, Apple would not cover that damage.
Apple will only guarantee what they shipped your computer with. They will not cover anything you have added to it (even if it originally came from them).
As far as Apple is concerned, the modules you just installed are no different than the ones you would have purchased from anyone else.
But, you should at least have confidence that they met Apple's standards.
I have always purchased my memory from OWC (Other World Computing) and have been very pleased with their modules. So, I will buy new rather than used when it comes to this high priced stuff.
I like having a good warranty when it comes to memory that costs this much. It's kind of hard to get warranty coverage on memory modules purchased second-hand.