Well, both ATI and Nvidia go by "stream processors" now and although the more you have the better... that doesn't really hold up when comparing an ATI to an Nvidia card. If you're comparing ATI to ATI cards... or Nvidia to Nvidia... then yes, more is always better. That second link I gave you was VERY complete (it even had some future cards populating the list) If you clicked on a specific card it would break down the details for you and if possible compare it to a desktop part as well. If you're into gaming, you pretty much HAVE to buy something off that first class of cards... and preferably towards the top of the list.