"PC3-11000? That's right, PC3-11000, or 1375MHz DDR3. PC3-11000 memory seems to be a creation unique to Kingston, a leader in system memory and flash memory products that has been in business since 1987. What they have done reminds me a bit of Spinal Tap, as my initial thought was that they took a 1333MHz module and turned the dial beyond 10, right up to 11."