here is a good budget build i believe for gaming
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.531858 - mobo&gpu
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103871 - cpu
http://www.newegg.com/Product/Product.aspx?Item=N82E16820161279 - ram
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148395 - harddrive
http://www.newegg.com/Product/Product.aspx?Item=N82E16827135204 - dvd writer
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371016 - psu
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129079&cm_re=antec_600-_-11-129-079-_-Product - case
total - about 663$ including shipping, 25$ in rebates
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.531858 - mobo&gpu
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103871 - cpu
http://www.newegg.com/Product/Product.aspx?Item=N82E16820161279 - ram
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148395 - harddrive
http://www.newegg.com/Product/Product.aspx?Item=N82E16827135204 - dvd writer
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371016 - psu
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129079&cm_re=antec_600-_-11-129-079-_-Product - case
total - about 663$ including shipping, 25$ in rebates