Hello, im a newbie here. i just bought a G5 1.6ghz. 512MB ram. 80 GB HDD which is noisy.this is my first mac. since i got this machine, my window 7 just collecting dust under the table. need opinion to choose good graphic card which support my G5 for video editing and games.and what else to make it faster and reliable.because im also doing some audio recording. thanks.