Wow I really suggest you turn your overclock down and voltage levels now (if you are using anything higher than ~1.65V). Intel's specified limit for memory voltage is 1.65V, 1.7V is fine but 2.5V?? Seriously you'll fry your Core i5's memory controller in a few weeks or months. Keep the RAM speed back down, there's not much of a difference between 1600 MHz and 1950 MHz. Otherwise for voltage keep it at 1.65V or the maximum that G.SKILL recommends.
Thanks for your reply. I looked up my voltages in the bios:
CPU core = 1.28v ( @3.71)
IMC = 1.262v
DRAM = 1.600v (@1950mhz)
CPU PLL = 1.812v
It seems like from what you said and other research online that the cpu controller is the limiting factor and recommends the dimms voltage stay under 1.65v - since im currently under that @ 1.600v - would it be possible to change it to 1.65v for the 8gbs @ 1950?
My mobo is pretty smart in the fact that it automatically reduces the CPU ghz and voltage when Im doing non intensive things - so its not like the cpu is running at 3.71 24/7.