I installed an EVGA 7800GT in my 8400 as well as the needed case fan and was wondering is there any way to mointor the temp. of my videocard? I have it overclocked very slightly and am wondering about heat as from my understanding the 8400 case is an oven. Are there any digital gauges that Dell or aftermarket offers?

And also, anyone taken a dremel to their case to improve airflow to their 8400 case? Any info or thoughts would be appreciated.