Dont look to much at timing parameter some give chipset lantency (nothing relate to ram) some just give Cas lantency.
The most important timing is collum to row delay but is hard to pronouce so it no use in marketing so no one know including here Cas sound better just sound better so it highly use in marketing.That apply only to Jedec ram.
[-peep-] french<P ID="edit"><FONT SIZE=-1><EM>Edited by juin on 05/09/03 02:34 PM.</EM></FONT></P>
basically you want the smallest numbers you can period, CAS latency is the most important hence why its often written in the name. Unless your really seriouse about knowing chances are thats al that matters.
CAS Latencies are alright but there are a lot of timing settings that can act just as important. Some configureations can't even run CAS 2 or even CAS 2.5. (The Intel 875P chipset for instance.) The CMD setting has a much harsher impact on a random acces than the CAS setting. So for gaming the with a CMD setting of 4T would kill a machine more than 2T no bank interleaving and normal latency settings.
The clock speed is more important too. Also there are the FSB speeds to the memory bus.
In essence there are a lot of timing setups. CPU, MB, and Memory configuration will determine what you can actually do.