so i was thinking.....that If i hook my PC up to my HD 40 inch screen for gaming will it over heat my GPU/CPU? (using native res).
Some would say yes it is, but then some dont take into account that not everyone is comfortable doing anything remotly out of the usual with technology
It will make no difference to how your hardware works. Don know what the resolution of either display is but chances are it will actually end up being easier for it.
Size in this instance means nothing. A higher resolution would make a difference (but that's a whole different conversation) no difference size or resolution will over heat your CPU or GPU.
Your T240 was 1920 x 1200 which in reality was higher than your 40 in which is 1920 x 1080.
Text will not look great, but graphics should be fine (ie Movies, TV and games).
Internet and text type programs - not as clear.
I'v gone from Samsung T240HD (monitor/HTDV) -> P2770 HD (also monitor/HDTV) -> samsung 32 In 1080 P LED 120 hz.