I want to upgrade the RAM in my 5,1. It's the 2.4ghz 8 core from mid 2010. I was looking around at the ddr3 1066, and have found that this ram doesn't have ECC, does that mean it won't work? Please school the newbie.... 
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231309
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231309