Not mentioned above is the fact that these modules are based on Samsung's infamous TCCD chips. These chips have a great track record and are highly sought after by overclockers and enthusiasts alike. EVP is the abbreviation for Extended Voltage Protection, under which OCZ offers a Lifetime Warranty for these modules all the way up to 3.0V ± 5%. ULN (Ultra Low Noise) technology uses various printed circuit board (PCB) techniques to reduce the amount of electrical noise that is present in all high-speed ICs. This results in faster and more stable memory.
Direct Link:
http://www.ocia.net/reviews/ocz4800/page1.shtml 
OCZ Technology Platinum Edition EL PC-4800 Dual Channel DDR
24th May 2005, 18:18
OCZ Technology Platinum Edition EL PC-4800 Dual Channel DDR 
