Virtual-Hideout posted a review on the Mushkin 2GB EM2-6400 DDR2-800 Memory Kit

Well, I'm not going to sugarcoat this conclusion. This is a basic 800mhz @ 5-5-5-12 @ 1.9v value memory kit with some fancy heat preaders and nothing more. I whole heartedly think it's not worth the effort to even bother trying to overclock them. Not when you really gotta crank the voltages just to squeeze some sap from the tree.

Mushkin 2GB EM2-6400 DDR2-800 Memory Kit Review