1. I partially explained this <A HREF="http://forumz.tomshardware.com/modules.php?name=Forums&file=faq¬found=1&code=1" target="_new">here</A>, for your reference. If there's anything that wasn't answered there, let me know.
2. Let's change that to "a-b-c-d/e" to make it easier. A is the CAS (Column Access Strobe) latency, C is RAS (Random Access Strobe?) latency, and B is CAS-to-RAS latency. The D/E I'm not sure about, perhaps read/write turnaround times? For all numbers, lower is better. Not all BIOSes allow all those numbers to be adjusted. My RAM is currently set at 2-2-2-5/7, which is the lowest. Default for generic RAM is 3-3-3-7/9, I believe.
3. The ns (nanosecond) rating is not an actual speed, but a rating of how high the memory could potentially clock to. I can't remember the equation for finding out what that is, but I remember it being really simple. Apparently not simple enough for me to remember, however
4. By changing the clock speeds of the device you wish to overclock. Refer to your owner's manual for where in the BIOS those settings are.
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