need new fan for Nvidia 6600 + picking the right ZALMAN

hi. my fan seems to be broken and i need a new one

Found following thread:
geforce 6600 fan broken

ZALMAN VF700-CU 2 Ball VGA COOLER was mentioned as recommendation.
I've checked at my local stores and they have only :

ZALMAN VF700-AlCu LED and
Zalman VF700-Cu

How different are those from the "2 ball" model ?

thank you


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