I have a Quad 2.66 Mac pro on the way and I'd like to upgrade the Ram in the smartest and cheapest way possible. Seems to me that 12gb (3x4gb) is the way to go to get a decent amount of memory out of my limited 4-slots. I've checked a few places and here's the pricing I've found. Memory America - $476.95 Ramjet - 524.99 MacSales - 489.99 all the above specify they have a compliant "apple thermal sensor" Then there is this ram at newegg for $374.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16820220423 which doesn't specify the heat sensor, but somewhere else on the forum some one said they popped it in an it worked well without running the fans all the time or other strangeness. My question is can I save myself 100$ and get the Ram without the sensor and is there anyone currently running that Patriot Ram in a Quad that can shed some light. Thanks in advance. By the way I realize getting the octo would have solved these issues, but it wasn't an option.