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Suggested procedure to remove the original fan/sink on the graphics chipset:
Many users have reported that the best way to remove the OEM heatsink is when the card is cold and the glue is brittle. Place a butter knife or flat screw driver tip in between the sink and the chip, and twist the knife to gently pry apart the fan and chipset. Do not touch any other component on the board. The sink should pop off the chip in no time. Some boards are not as strongly built as others, be careful not to damage componet on the board.
The "glue" left on the chipset can be softened with carburetor cleaner* (key ingredients are Toluene, MEK, Xylene). Use a razor to shave the thick glue off the chip. Rub the chip clean with a cloth wetted with carburetor cleaner. Then finish off by wiping the chip with rubbing alcohol (70% isopropyl alcohol). This ensures removal of the slow evaporating solvents such as Naphtha, commonly included in the carburetor cleaner.
* Here are some commercial
carburetor cleaners good for cleaning up the glue left on the chips;
(You do not need much, so get the smallest can for this job.)
Auto Zone Carb Cleaner (Toluene)
STP Carb. Cleaner (Xylene, MEK)
STP Throttle Cleaner (Xylene, MEK)
VP Racing Fuel Carb Spray Cleaner (Toluene)
Vavoline (Synpower) Carb/Choke Cleaner (Xylene)
Master Carb & Choke Cleaner, red can, (Toluene)
Caution: Solvents in carburetor cleaner are flammable, do not spay into the computer. Let the excess solvent fully evaporated, before installing the card back into the computer.