Does connecting your laptop to TV via HDMI decrease gaming performance?
Solution 1:
In your situation I would connect the TV to the lappy and use just the TV as a screen; here's why:
- The 100Hz refresh rate combined with the LED is going to make the refresh rate the same (or comparable) as the lappy.
- The resolution is higher.
- And you don't say the size of the laptop screen, but I assume it's less than 46 inches. So it'll be probably double or triple the screen size.
It's going to look bigger and higher res on the TV and the refresh rate shouldn't be noticeable to human eyes.
I have a similar set up: 27" FHD screen with 14" lappy. I recommend external keyboard and gaming grade mouse (preferably wireless).
Solution 2:
Outputting your display to a TV does not inherently decrease gaming performance. If your laptop screen supports a maximum resolution of 1366 x 768 and you try playing anything at 1080p (1920 x 1080) you're naturally going to experience a degradation in refresh rate (regardless of whether it's a TV or a regular monitor) as compared to your usual 1366x768 display.
That said, I'll try to answer your question because it's not very clear. If you are using the TV as the only display your laptop is showing at the native resolution of 1366 x 768, it should be updating at the same rate as if it were on the screen of the laptop. If you're duplicating screens or extending display across your screen and TV, you will of course experience a bit of decrease of performance. Any time your computer has to draw more pixels every refresh, you will of course be using more GPU power to draw it all.
Solution 3:
I have a laptop with dual display, Intel 4000 and Nvidia 620M...On Nvidia I have selected to use 620 GPU for 3D, also the HDMI seems to use Intel 4000 for HDMI OUTPUT... The boost in 3D performance was noticeable after manual selection of Nvidia GPU in Nvidia Control Panel... (was AUTO). I have played Tomb Raider 3 with all settings at Maximum, but without one setting (some like P.....something). FSAA, Anti-Al 8X, and so on.
My TV is 3D LG 46", Full HD. Laptop is Fujitsu LH532/G22, i3, 8Gb ram, 5400rpm hdd 500Gb.