The new Mac Pro 2009 have now adopted the ECC DDR3 and dropped the previous expensive and limited FB-DIMM modules. If one can easily find ECC DDR3 modules in shops, we have recently learned that there two categories of of EEC DDR3 modules, both being JEDEC compatible. The first one includes a thermal sensor making possible for the system on which it is installed to get information related to the working temperature of such modules. The second type of ECC DDR3 does not have such sensor. the Mac Pro is making use of such sensor, so you should better take modules featuring such technology.In practice, both types of modules work flawlessly on the new Mac Pro. However, sensor-free modules will fail if you run the hardware test. According to a report published on Apple discussion forum, the lack of such sensor might increase the speed of the cooling fans. So, if you plan to pur
