Must I get rid off thermal paste after my external build a stock heatsink?

Rayne604

Honorable
May 31, 2013
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I'm going to do an external build first with a stock heatsink. After everything running smoothly, I'll replace the heatsink and secure my mobo into the case. Must I get rid of the thermal paste on the CPU before installing my Antec Kuhler 920 H2O which already has thermal paste applies?