Does RAM timings with n-n-n-3n value perform better than anything else?

Solution 1:

Both the long and short answers yield the same thing: no.

While you may believe by intuition that multiples of eachother would cause better system performance, this is not the case. Those timing numbers simply represent the timing delay (in nanoseconds) of various operations for the memory to perform. In every single case, you want these numbers to be as low as possible.

The lower the numbers are, the faster the RAM performs, and thus, the more operations and bandwidth can be performed per unit time. At the same frequency, 8-7-8-20 will outperform (albeit not much more) memory running at 8-8-8-24. If you compare these propagation delays to the time between CPU cycles, you will find that the RAM is always slower, and thus, the limiting factor.

For example, if you have a 2 GHz processor, the time between cycles is only 0.5 nanoseconds. As you can infer from this, obviously you want the fastest possible RAM. There is no advantage to matching the various timings as multiples of each other.