The speed of a computer is based on all thru put devices ala Tri channel Ram matched with tri channel proc.
Now the most important factor is the latency of the ram / memory the lower the number of latency the faster the commands and response will be. Research Cat latency
Cat Latency 7 is the fastest Tri or quad channel DDRAM available.
For example:
DDR3 RAM 1600mghz with caS latency of 7 is much faster than DDR3 2400mghz at 2400 with cat latency of 10 or 11.
Latency is the time from the point the user pushes the enter/command button sending instructions to your ram into the processor, ect.... CAS LATENCY
http://www.newegg.com/Product/Produc...82E16820233253