Respuesta a "upgrade videocard Radeon HD 4850 on Radeon HD 6970 2 GB RAM?"I just upgraded my late 2009 iMac 27" (iMac11,1) replacing the HD4850 with HD6970 yesterday. I did have to cut out the plastic bezel underneath the video card as shown in the iFixit guide where there are a bunch of cable, to allow the card to slide underneath the PCB into the connector. Connecting the heat sensor of the video card is a pain. And after the install in iStat the GPU die temp does not show up. however since i am controlling the fans manually I am not to worried (i still have GPU heatsink info and all the other temped indicators) I bought the HD6970 from macpremiumparts on ebay. They were great, fast shipping to Australia. The card works great!!!