Personally, I haven't looked much into purchasing aftermarket cooling for any of my graphics cards I currently run. This is mainly due to the fact that I own GTX 280's and their very complex cooling system. However, on my spare 9800GTX+, cooling of the RAM and power management chips aren't so important, as they don't get very warm, even when left exposed to open air. Keeping the core at a lower temperature for F@H does help to keep the overall temperature of my room down, because we all know NVIDIA cards tend to run a fair bit warmer than their ATI counterparts.
Most of the cooler submissions I have received lately are better than stock temperatures, but some require $80 to be spent for a lot of flash and very little gain. Seeing such things, I had sort of lost hope for the GPU air cooling segment, and assume manufacturers were throwing in the towel and allowing end users to just go to water cooling as the way to combat, sometimes well over 80 degree temperatures, like when my GTX 280's are Folding. There is a bit more involved with water cooling, but when an air cooler asks the same price as some full coverage water blocks, it really makes you ponder the idea of going to water to solve heat issues.
Today we are looking at a submission from Arctic Cooling, the Accelero Twin Turbo Pro. By now I would assume most of you have seen the numbers produced by the Accelero line up of products. Up to now, every time I see a post in a forum about one, members are very pleased with their results and the fact that they don't have to beg, borrow, or steal the money to afford the cooler in the first place. There is already a Twin Turbo as well, but Arctic Cooling is attempting to improve on an already good cooler, in attempts to produce a great cooler.