Get one of these and install next to the card on the side where that fan is. Then you can see if it's enough to keep the GPU cool.
http://www.amazon.com/Vantec-SP-FC70-BL-Spectrum-System-Adjustable/dp/B000233ZMU/
The bearing on my gpu fan is shot. Makes a horrible noise when I run it. I would prefer not to run it with no fan. It's a Gigabyte GeForce 640 GT. I don't know what fan would be compatible with it and I also don't know how to remove the cable from the connector(feels like it's stuck). Thanks.

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