Add 8GB to existing 8GB

[Fbks68]

I have an ASUS P7P55D-E Pro, Intel i7-860 CPU, Win 7, G.Skill F3 10666CL7D-8GBRH. I wish to add another 8GB of the same memory. Will I have a problem with the settings? I purchased the original memory back in January of 2010.
Thanks in advance for your help.

[Tradesman]

Generally, especially with Intel CPUs you can get two sets to work together with adjustments to DRAM and/or QPI/VTT (MC) voltage....however there is no guarantee that they will work together. If buying locally I'd chack and make sure they can be returned/exchanged, if e-tail, like NewEgg they generally offer a 30 day return policy (though often w/ a restocking fee)....or could just go with a straight 16GB set and use the sticks you have for another system or sell them