Idle clocks with multi monitor.

[Trapt In A Jar]

Simple question I think.
Is there any way I can force my gpu clock lower when I'm not playing a game? I run 300mhz normally, but I really want my second monitor connected and do not like the idle temp increase when idling at 500mhz.

Edit: I meant to post this in graphics and displays, Idk how it ended up here.

 

[Jonathan Sifleet]

What graphics card?