LMAO, I need to clear up this myth. There is NO SUCH THING as DUAL CHANNEL RAM. Period.. Not saying anything against you Snow, you know I love you!
Actually, dual channel can work for any DDR ram, but it is all in the motherboard pathways, has nothing to do with the RAM. So if he was to order some of that OVERPRICED dual channel crap, he would be wasting his money.
To really speed up the PC, you need to get high speed, LOW CAS and ROW RECHARGE/BURST Latency RAM (those are the timings read like this. ex. 2-2-2-5, 2.5-4-4-6, etc etc) It needs to be at least 400MHz, DDR400 PC3200 or better. I recommend Crucial or OCZ as a choice company, as they are unrivalled because of their mircon based structure and OCing abilities and stability.