I'm fairly new to comparing video cards, and finding up to date, unbiased articles on this is a pain, so I ask you kind folks this - I have a choice of buying 2 similar cards: 1) GeForce 7600 GS with 512MB video memory and 128-bit memory bus. 2) ATI Radeon X1900 GT with 256MB video memory and 256-bit memory bus. Most other attributes are similar but the ATI is slightly faster speeds (and higher price). Generally speaking though, what is more important: more memory? or better bus? Another comparison in a similar price zone is a 1) GeForce 7600 GS with 512MB video memory and 128-bit memory bus, 533 MHz Memory Clock, 12.8 GB/s Memory Bandwidth. (heat sink-no fan) 2) GeForce 7600 GT with 256MB video memory, 128-bit memory bus, 1400 MHz Memory Clock, 22.4GB/s Memory Bandwidth. (fan) Which of these two would result in better performance? Are fans that noisy?