That Xorg log you posted said:
(WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
(WW) NVIDIA(0): No valid modes for "1024x768"; removing.
(II) NVIDIA(0): Virtual screen size determined to be 800 x 600
I'm guessing that's your problem. Have you set up the custom EDID.bin file as shown above in this thread? That's what fixed mine. Look through xorg.conf again and the custom edid.bin to make sure everything is in the right path and set up properly.