What is the recommended voltage of memory for asus p5 kpl am

[reccaflame]

is it okay that i used a memory with 2.1 volts for asus p5 kpl am

 

[Ubrales]

The voltage range is determined by the RAM manufacturer.

2.1 volts seems high. You must check the RAM specs from the RAM manufacturer's website. It is different for different types of RAM.