hi all im currently running my xfx7800gt gc at 514 x 1.18,with 1.5 volt bios mod with stock cooling and no problems.im thinking of getting the zalman fs-v7 fatility to cool it hoping to get more.just wondering what temps some of you guys are getting with this fan,have you noticed a vast improvement in cooling is it realy worth spending 27 pound (50 dollars)on the zalman