Ok so my Late 2009 i7 27" iMac has a bad video card. I figure it might cost to much to have the card replaced so i have since purchased a new 27" iMac and i am using my old iMac as a 2nd monitor and running dual displays with my new iMac. I am wondering, What things can i do (either software or hardware related ) that will minimize usage/power/heat from the older iMac since i am only using it in TDM as a 2nd monitor? It still giving off a good amount of heat, So i am just wondering if i can do anything like disabling certain things or remove certain things to limit the amount of heat and power it uses. So far i am running it in Safe-Mode and have internet/wifi off. Just curious if there is anything else i can do? Can i remove the ram? disable anything? I thought it would cut back on the heat issue since i am running it in Safe-Mode and its relying on the graphics card from my other iMac since i am in TDM. Any tips or advice would be great, thanks.