Hardwarecanucks posted a review of the Mushkin XP2 PC2-8500 2GB ram kit.

This kit is not all show and no go,it performs extremely well even with low voltages. There are some downfalls though; they did not respond to voltages higher than 2.3V when running CL5, and they lagged behind the slower OCZ Platinums in some of the Everest and Sisoft Sandra tests. On the other hand, the top frequency results were out of this world! Hitting DDR2-1121 with 2.3V is not something that happens every day.

Mushkin XP2 PC2-8500 Ram Review