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Reading some official literature on the 8-series it is capable of displaying 2560x1600 which I understand, correct me if I'm wrong to be full HD 1080 but there is conflicting reports of whether it only supports interlaced and not progressive. Newer cards I would imagine will further take any load off your CPU although it's obviously powerful enough...
it wont, it just wont play it. its the analogue output that can be limited to 480pFull HD is 1920 x 1080 so 2560 x 1600 is actually higher. But as mentioned you will need HDCP output to get the HD signal to you monitor, else it will scale it to SD size
Rich
PLease excuse the ignorance but is HDCP a software thing or hardware thing?