Although, I am running all my components at stock settings. So nothing has been overclocked or overvolted. As stated, 2.1 volts is the normal voltage for my OCZ2N1066SR2GK ram. Then by looking at the model number 1066Mhz is also the default speed.
Also I have a Corsair Airflow Fan attached to the ram. As well as an Aerocool Easywatch monitoring my ram temperatures.
This is the link to my OCZ ram for more information.
EPP is not a standard like JEDEC - 2.1V is required to overclocked 800 Mhz memory to 1066 Mhz. The RAM is designed to work at 1.8V and 800 Mhz, so anything above that is overclocking. Since it's on warranty, just RMA it and get new RAM.
The note "**Do not exceed 2.1V specification if listed on the module label" implies that they already overvolt them to their maximum.