I just got my Gateway Intel i7 3770 3.4Ghz, 10GB Ram, 2TB HDD with crappy Intel HD4000 onboard gfx. The system is powered by a 300W PSU. I've read that the Radeon HD 7750 works fine on such power supplies. Well, I went and got a Gigabyte HD7750 and it did not work. Nothing from HDMI, VGA or DVI, all I got was black screen and my monitor telling me no signal. I did hear the fan and it was on. My question to you is, should I opt for the HD7750 Low Profile Card instead? I'm assuming it being LP it will draw less power? Or is my CPU to strong for either? Thanks!