I want to upgrade my Radeon 7000 pci 32mb ddr (no AGP slot). I will either be purchasing a 9000 PCI or an MX440 PCI. My pc is a microtower with only 2 fans inside, and little room for anything else. The Powercolor 9000 pci is supposed to have a heatsink only, whereas I can get a MX440 with a cooling fan. If I did not change the stock fans, which card would cause more heat buildup in my case? The 7000 has only a heatsink, and seems to be ok. And do radeons run cooler than Nvidias? Any help would be appreciated.