Hi everyone and thanks for reading

I hope this is a simple question... I still play some older games that would render just fine with the onboard graphics capabilities of this board. Is there any simple way to utilize the onboard and give my 4870 a break when its not needed, short of opening the case and removing the discreet graphics card?

Here in Florida it would save on some heat production, something that we have in excess at this time, although it makes for a nice little space heater in the winter

Thank you for your time and any help you can give.