Some BIOS's automatically disable the CPU's integrated GPU when an external graphics card is detected. Others don't or have it as a manual setting. My Gigabyte motherboard allows me to disable it manually via a BIOS option (advanced CPU features, I believe). I've left it enabled, but it saves a tiny amount of memory if it's disabled.
I can assure you the iGPU does nothing when an external graphics card is being used, if a monitor cable is not plugged into it. No "SLI". No acting as a co-processor. I cannot even use it for QuickSync (an accelerated video encoding algorithm supported on Intel iGPU's). It sits idle.
ok, I still cant figure out why my GPU is getting so hot :S
new asus gputweak update has made my gpu much much better due to the memory defragmention function, i recommend all those who experience similar problems to check it out,
thx again guys.
Edited by JohnSmith11, 22 October 2017 - 07:54 PM.