Well DDRAM was devloped because there was a huge need for faster and better memory data processing, see CPU speeds went through the roof and once they managed to get past the 1GHZ barrier a year or so ago I thinka little more even, they realized that SDRAM and EDO and all these other types of RAM were unable to process the data as fast as the processor would "handle" it.
Basically Registered DDR uses the Read command differently and only registers data upon request, its ideal memory for Servers and High end machines that need alot of ram very fast.
So registered is better.
The use of "hacker" to mean "security breaker" is a confusion on the part of the mass media. We hackers refuse to recognize that meaning, and continue using the word to mean, "Someone who loves to program and enjoys being clever about it."
"Its not a bug, its a feature" (Epic Games)