Hello, I want to buy a NVIDIA GTX 295 because I kinda collect GPUs and It has a max TDP of 285. I also want to use it a bit, i know my 770 is much better but still. My question is how do I setup something with a external power supply? I was on google but it only said I need to buy a power supply and hook it up to the GPU. Im a bit confused, can someone help me?