Weird issue with NVIDIA GTX 770 using HDMI or DVI

[Nutellas]

I just upgraded my graphic card from ATI HD 4890 and my spec ended like this:

Processor: i7 920 2.67GHz
Motherboard: Asus P6T SE
GPU: GIGABYTE NVIDIA GTX 770
RAM: 3x2GB Corsair DDR3 Tri-channel
Power supply: Corsair 750W

I was happily going to test my new HDMI/HDMI cable on my new GPU but then it was horrible, like other people already experienced, the resolution is set to 1920x1080 (and that is what my HDTV says aswell) but the aspect is like low resolution, hardly readable text, 8-bit color-like, and overscan in all four sides. But then I tried some games and they work fine... it just adjust to the screen and the resolution is back to a real 1920x1080, nice color, etc.
Still cant do anything but playing a game without going blind.

I tried on a Samsung HDTV wich correctly scales out of the games too, so overscan is not there anymore but the rest persist the same. I can adjust the sharpness on this HDTV to 0 and ease the problems but I know it's an odd job, not only by intuition, I still see serrated edges where my 4890 rendered perfectly.

I touched every NVIDIA control panel option, reinstalled everything, tried older driver versions, checked HDMI wire works fine, I also have a DVI/HDMI adapter (no change).

And there is more, sometimes the screen go randomly off and comes back after two seconds. The lesser times it just makes my PC reboot. I've readed it may be a energy problem on the RAIL i'm using for the GPU, because i'm not forcing OC in any device (link here).

Any help will be highly appreciated.

 

[Devballs]

Did you remove all the AMD drivers prior to the new upgrade? I would recommend using a fresh install of all graphic drivers and see if that makes a difference.

 

[Nutellas]

Yes, several times, with Display Driver unistaller

 

[ingtar33]

It sounds like you still have an AMD graphics driver conflicting with your nvidia drivers.

 

[Nutellas]

No, I have totally unistalled AMD drivers via Display Driver Unistaller and installed-unistalled 4 times the NVIDIA's.

 

[ingtar33]

No, I have totally unistalled AMD drivers via Display Driver Unistaller and installed-unistalled 4 times the NVIDIA's.

taking you at your word (since there is no way to tell otherwise) and since you've clamed to have used older versions of the nvidia drivers, you probably have a bad gpu then.

Understand, gpus still have 2d and 3d renderers, it's not the same part of the chip, and it is possible for the 2d renderer to be broken while the 3d works fine. Sounds like that's your issue, as even with win7, the desktop environment still uses the 2d renderer.

it is possible your motherboard drivers and bios needs to be updated. try doing that before you give up. but it doesnt look good if you've tried multiple different nvidia drivers and none of them work. If you haven't tried older drivers, try an older driver. Try installing the drivers without nvidia experience (which causes a lot of problems)