You have G mode on F9, is that just the printed G logo is missing. I also hasn't got a printed G logo on F9 on my Dell G15, but the function is working since I installed the Alienware Command Center and the Alienware OC 
Hi all, i recently received the new G15 gaming laptop. Mine didn’t come with the gaming key, so I can’t use the game shift feature when I want to boost my fans. I actually wished I had spent the extra £20 to get the RGB keyboard option but they didn’t do that with a UK keyboard layout. So anyway my question is really that as I don’t have that key, is this feature lost to me now? Pressing Alt F9 does nothing. Other than that I am really pleased with the laptop. It offers a great deal for the price. 
Dell G15 5510 Game Shift?