I have the Gigabyte 8KNXP Ultra-64 board and Prescott 3200 with 4-512MB Corsair XMS Pro 2-2-2-5 memory.
You can mix the lower latency with higher latency with no problem.
3 sticks won't work in dual channel, so get the matched pair.
I like the LED lites, of course I have a clear panel.
<pre><font color=red>°¤o,¸¸¸,o¤°`°¤o \\// o¤°`°¤o,¸¸¸,o¤°
And the sign says "You got to have a membership card to get inside" Huh
So I got me a pen and paper And I made up my own little sign</pre><p></font color=red>