Hello, I am new to the forum, i actually get a lot of good information from here but is the first time wrote! I have a mac pro 2009 that i got it upgraded to 2010 with the obvious hack and the cpu s that needed. I had problems with it for many months, and just today i realize after many many tests that it was the CPU B was failing.. I took of the cpu and start my mac, it is just fine!!It runs great and the northern bridge temps that was previously 70 C they are 35 now! All the temperatures on the mac are pretty great, but after i took the cpu off, the heat sink A fun is just running like crazy, i can't even have music anymore.. So first thing ofcorse was to reset the SMC, but nothing, after i reset the PRAM but still nothing.Now i have huge fan noiz after 2-3 minutes i am in the os but the temperatures are great, i really don't get it. Anyone can help me guys?I am sound engineer and i can't work like that, and i can't have apple service because of the hack. Thanks a lot!