EDEC standards state that DDR3 memory has to be able to run at 1066MHz, 9-9-9-24 2T timings with only 1.55 volts. When DDR3 was first introduced a couple of years ago, it was suppoosed to use less volts then its predecessor, DDR2. DDR2 memory needed on average 1.85-2.0 volts and above to properly operate at its optimum frequency. DDR3 memory came in starting at 1.55volts, but because of the limitation of the socket 775 CPU's (needing to use an MCP) the only true way of getting any serious performance out of DDR3 memory, people and companies alike were cranking the volts of their DDR3 memory modules past the 2.0 voltage mark, which kinda defeated the whole purpose of upgrading from DDR2 to DDR3. The required amount of voltage and the minor performance gain did not justify the added cost of this newer memory standard.It wasn't until last year when Intel introduced the 1366 CPU's, the mighty and still reigning champions, the Core i7 that Intel placed a voltage limitation of 1.65V. Intel states that going higher then this rated "Safe" voltage can and will torch the IMC (Integrated Memory Controller) in the CPU. Memory manufacturers scrambled for a little while tring to come up with high frequency memory with this voltage limitation. Naturally it did not take too long to adhere to this new limitation. The memory manufacturers stayed within this 1.65 voltage limitation, I've even heard some memory modules being able to operate at 1.55-1.6 volts while maintaing their high frequencies. A year has passed and Intel has come out with a whole new CPU platform, the 1156 socket, and this newer CPU comes with the same memory voltage limitation of 1.65 volts. Unlike its bigger brother the Core i7 1366 CPU this CPU only uses dual channel memory. Memory manufacturers still used the 1.65 voltage requirement for their memory. Until Now, Gskill has come up with high frequency memory that operates below the average voltage of 1.65 volts, and even lower then JEDEC standard of 1.55 volts.