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I ordered a set of 3x 16GB RAM modules from OWC and asked in advance explicitly whether it would work in my 2009 Nehalem Mac Pro 4.1 (2x 2.66Ghz), a machine I had ordered directly from Apple the day it came out and never upgraded since. All original, no hacks. OWC said yes. Yet neither all 3...

Hello, New to the forums and to Macs in general. I have a question that I'm hoping someone can help clear up for me. I have a 2009 Mac pro that I'm in the process of upgrading to a dual CPU 5680. I ordered all the parts but and the Ram arrived first. 8 sticks of 8gb 1333 ECC ram (Samsung). I'm...

Hi guys! I am running an early 2009 single CPU Mac Pro 4.1, successful updated with the 5.1 firmware. After the installation of a 6 core Xeon with 3.46Ghz and 4 x 8GB HYNX 1333Mhz ECC Ram, everything is running fine, except one minor issue : The rams are only recognized as 1066Mhz instead of...

Hi everybody! I always wanted a cMP and finally got a 2010 2x2.4 cMP in pretty god shape. Now I'm about to make some upgrades and one of them is the RAM. I've been surfing the web and found that the guys from a-Tech (atechcomponents.com) on eBay offer their 1333 ECC RAM 8Gb modules for a VERY...