Will enabling the iGPU cause performance loss to the dedicated GPU?

Aviation FAN

Reputable
Nov 16, 2014
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I have my PC hooked up to my monitor which I game, and a TV on which I watch stuff (TV on the next room, I have a long cable and wireless keyboard and mouse). So if I have the iGPU cable enabled in BIOS, but not connected to my TV so only my discrete GPU (GTX 750) connected to a display, will there be performance loss? And what about if both iGPU and my GTX 750 is connected to a display will there be a performance loss when gaming?