The NOISE generated by the 2009 MacPro is bad enough. To add insult to injury, both intake and exhaust fans have started to fail in my 2009 MacPro. They make an annoying "wobble" noise that overpowers 2 other PC's running in my office. At 1st I thought one was bad... But I had to win the lottery again and win 2 bad fans. While I considered hooking up a couple low-noise PC fans with a manual speed control, I found a deal I could't pass up. Original OEM Fans for $4.00 each. Time for the tear down and install. Should be fun.