Ricky,
Autotech is saying he has XMP enabled and his system is running stable. XMP is not something you normally toggle on/off.
Sometimes the SPD detected speed of memory is base clock speed and timings. The RAM however, may be capable of running at a higher clock speed and memory timings.
XMP sets the correct clock speed and memory timings for you.
Lower numbers (latency) in memory timings means the RAM can run faster since it is able to perform an operation in a lesser number of clock cycles.
But, there is a ceiling on performance.
When deciding on memory, you need to take into consideration what CPU you will be running, and whether you will be over clocking or not. Memory with lower timings may run faster/stable at default or XMP clock and timings. However, you may not be able to overclock your CPU as high because "tolerances" (clock speed, timings and voltages) are tighter.
Memory of the same clock speed with higher rated timings are a bit more relaxed and may offer a higher threshold for over-clock-ability.
Bottom line, if you are someone who wants to spent his time tweaking every bit of performance from his machine, then go with memory that has higher clock speed and memory timings.
If you are someone who is satisfied with a quad-core processor and a ton of good ram, then go with the lower latency ram and call it a day.
