I was thinking of getting DDR 800 but I found DDR 1066 for about 20$ more. So would be it be good buy. I have a x38 and a q9450.
1066:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227298
OR
http://www.newegg.com/Product/Product.aspx?Item=N82E16820146785
VS
DDR 800
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220293
1066:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227298
OR
http://www.newegg.com/Product/Product.aspx?Item=N82E16820146785
VS
DDR 800
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220293