hey bro ..wanna ask ..how do I know that i am using the HDMI cable or not ?coz currently i am using the Acer H233H 23 Wide Screen ..i dunno how to utillize the input ..basically i just put in all the input ..how do i do some setting ?my Graphic card would be Gigaybyte 9800 Gt 512mb ..how do i make the refresh rate at 76 ..as i know its the maximum..