THIS AUCTION IS FOR A 3.33GHZ 12-CORE CPU TRAY - THIS WILL WORK WITH ANY 2010 OR 2012 5,1 MAC PRO WESTMERE OR NEHALEM TOWER - NO CORE RETURN REQUIRED Before I ship I will need you to send me a photograph of the about this Mac page so that I can confirm your model year, I also will need to see confirmation of your system firmware. This tray will not work with a 2009 model year system
eBay