http://www.newegg.com/Product/Product.aspx?Item=N82E16820231449&nm_mc=EMC-IGNEFL052611&cm_mmc=EMC-IGNEFL052611-_-EMC-052611-Index-_-DesktopMemory-_-20231449-L06B
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231443
Both 2x2GB both same series.
i5 2500k
ASRock Extreme 4 P67
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231443
Both 2x2GB both same series.
i5 2500k
ASRock Extreme 4 P67