Massive framerate drop when using TV as monitor

[DukeEdwardI]

I recently hooked up my desktop to the TV in my room temporarily. I booted up NV and to my annoyance, the framerate had gone from a buttery smooth 60-100fps indoors to <20fps. Now, the monitor I was hooked up to before was 1440x900 and the TV is 1920x1080. I obviously expected some perforamnce loss, but nothing this drastic. Even after lowering all the settings to the absolute minimum, I still only get around 20fps. Even at 1366x768.

I'm at a complete loss what the problem could be. Some issue with the HDMI connection? (TV doesn't have DVI, only VGA).

My game is only slightly modded. About 25 mods including NVSE, Stutter Remover, the 4GB exe. Specs are: i5 750 2.67ghz, AMD 6950 1GB, 8GB DDR3 RAM, Windows 7 64-bit

[Incunabulum]

Does your tv have a 60 hertz refresh rate? Depending on how old it is it may cap out at 30.

But I suspect it might be the VGA connection hitting a hardware limit.

Are you using a DVI to VGA adapter? That may be preventing your OS from properly seeing the TVs refresh rate.

And finally, how far away from the TV is the computer. VGA is an analog signal and signal degradation over the length of the cable has a far greater effect on analog than digital signals.

[DukeEdwardI]

Thank you for your response, but I actually just figured it out. I was connected to the TV via an HDMI cable, and it dawned on me that HDMI does video AND audio. So my GPU was trying to transcode the audio and send it through the HDMI cable along with the video, severely affecting performance. So i disabled my GPU's HDMI audio output and that did the trick.

[NullBy7e]

Originally posted by DukeEdwardI:

Thank you for your response, but I actually just figured it out. I was connected to the TV via an HDMI cable, and it dawned on me that HDMI does video AND audio. So my GPU was trying to transcode the audio and send it through the HDMI cable along with the video, severely affecting performance. So i disabled my GPU's HDMI audio output and that did the trick.

That worked because the GPU was having a hard time providing both audio and 1080p HD video so you compensated for it by disabling audio output.