Hi all , i'm here again for ask some help. 1) I have mac pro 2010 with 8 core , i sold all 2 cpu and bought just 1 x5570 , working like charm , i left socket b empty. No problem with this 2) i had to remove all mac pro rams , becouse when i boot.. after 20 seconds or so fan of cpu socket a "where is the 5570" start to spin up as hell. 3) i got 1 stick of ram of corsair 1333 mhz.. an normal memory of 4 gb.... i have it in slot 1 , and with this mac pro fan never spin up , her1e is my problem 1) if i put another same ram stick in slot 2... fan spin , if i test the other corsair in slot 1.. it spin...if i use any of 1 gb stick of apple mac pro oem in every slot and in every combination it spin up as hell , allways after 20 seconds or so... also if i put mac pro in stop.. and wake up.. it need 20 seconds or so for spin up... 6000 rpm..seems to stay in airport"i tried any smc fan control so don't tip me on this " 2) i bought owc ram 2 stick 4gb 1333 mhz for mac pro , "i know they also got thermal chip" ,nothing i test them in every way , every combination... stil spin up.. 3) for be sure.. i tested any other normal ram of gaming desktop . my bro ram high quality.. my gf ram.. my friend ram... it allways spin up.... seems to work only with this stick.... its really stupid.. and strange... And i have tried any of combination listed above.. with pram reset.. smc reset... i really don't know... someone got idea?