Hi, I've been contemplating purchasing either an Nvidia 260 or an ATI 4870 as an upgrade from an nvidia 9600gt. I'd be using this card in a music production computer (also for high-end gaming) so noise levels are some what of a concern. The 260's heatsink cannot be replaced as far as I'm aware, but the 4870 will allow me to fit a new heatsink with a 120mm fan of my choice (noctua). Does anybody have any knowledge or readings of the noise levels of the 260's fan? I understand that it will increase in speed/noise as the gpu heats up. Any help will be appreciated.