should i go with the 8 gb ram or 4gb ram i will be using it on the, ASRock P67 EXTREME4 GEN3 LGA 1155 Intel P67
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157265
G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3: 29.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3: 29.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231277
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157265
G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3: 29.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3: 29.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231277