Sry, but i need some help from other users such as nubius
I'm here to save the day! Yes basically the Extreme Edition otherwise known as High Performance RAM has much faster latencies which means that it actually communicates faster with the CPU per clock cycle than Value RAM. Value RAM is rated usually at 3-3-3-8 timings whereas high performance RAM is around 2-3-2-6 depending on what kind you get, there are various forms of the high performance so even some of the high performance are faster than themselves meaning some have 2-2-2-5 timings or something of that nature. Not only that, but the RAM is actually built with quality and assurance in mind. Value RAM is more along the lines of quickly put together and yeah it'll work but we haven't put in a lot of time towards designing it for efficiency whereas high performance RAM they have. Also, RAM that comes in kits such as a 1gb kit which is 2 512mb sticks are tested in Dual Channel so they are certified to run in dual channel whereas if you bought one value ram stick now, and decided to get the same make and model down the road, theres a chance it could run in dual channel and theres a chance it might not, whereas like I said high performance is tested and guaranteed to run in dual channel as long as the motherboard and CPU support it. Hope this helps
EDIT: By the way all those timings are in terms of nanoseconds, so really as humans we don't notice it a CL of 3 compared to 2, it's like 10 nanoseconds quicker, but like I said the main thing is the fact they are specially designed and a lot more work goes into making those chips compared to Value RAM so really if you want a good gaming machine you should stick good RAM in there.