Problems with the GTX 660 4K through HDMI
Problems with the GTX 660 4K through HDMI
Hey there, I’ve got a GTX 660 that I installed in my media center (paired with an old I5-4690). I’m seeing 4K output from the card over HDMI to a smart TV, but it’s not working as expected. The specs say it should support 3840x2160 at 30Hz, yet I’m not getting that. Switching to the iGPU helps a bit at 4K but still struggles with some content. Lowering the output on the GTX660 to 1920x1080 works temporarily. The Nvidia control panel lists 3840x2160@60Hz as an option, though it doesn’t function either. Drivers are up-to-date, and I’ve checked the rest of the setup. Unfortunately, I don’t have a 4K monitor to test other settings. I’m a bit stuck—any tips would be great!
Which HDMI cable are you employing? The problem with 4K is unclear. Could you clarify?
No signal was found using 4K on the GTX660. Other than that, the HDMI 2.0 cable functions properly for 4K through the iGPU.
Consider performing an "HDMI reset." It often happens that the signals between the computer and monitor become mixed up. To reset, turn off both devices and disconnect the power cables from each. Unplug the HDMI cable from both. Wait about 30 seconds, then reconnect everything and restart the computer.
Under 2 meters of cable the guidance from Nvidia forums doesn’t help much. Restarting and power cycling haven’t improved the 4K performance on the GTX 660. I’ve also experimented with various chroma subsampling settings.
Consider changing your BIOS to non-secure boot with legacy ROM support activated on your iGPU. Then boot using your current display on the GPU. You should see video and Windows start normally. After the system loads and drivers are installed, restart without shutting down, since this won’t list UEFI bios for monitors. After that, you can turn secure boot back on.