well, this solution has worked for many people that i kno
sandwiched between the vga blower/fan/heatsink/whatever and the gpu is thermal goop (u kno, the stuff used on CPUs) only issue: its the generic Bird Shit kind (its white). if u got ur card from a hiQ company such as SapphireTech, this may not be an issue. but if ur card came from powercolor or evga or asus or bfgtech or some other lowQ place then listen up! u mite be able to help ur gpu out by using different thermal paste!
-Arctic Silver 5
-Arctic Silver III
-Antec Reference Silver Thermal Compound
want to buy any of these? then google it.
depending on the strength of the card, it can lower temps by up to 15°C
avg temp reduction: