http://cgi.ebay.com/CLASSIFIED-Inte...9873?cmd=ViewItem&pt=CPUs&hash=item20b1cd10c1 And yes, its LGA1366 same as all the others... it seems to be the most powerful of the bloomfield processors.. The good thing about the singles unlike the duals is steve allows us to use non-xeon processors in the mac pro.. I just went from a w3520 to the w3580 - the max 3.33 which apple sells for 1200.00(ouch) if u go from 2.93 or 2.66.. I only paid 600 for mine.. However, this processor seems tempting though.. and with non ecc memory, it should work with no problems.. same stepping D0.