Originally Posted by Brett VanKirk
The link below contains benchmarks that were done to prove that DDR2-533 gives higher memory bandwidth then DDR2-400 in an Inspiron 6000. This person compares DDR2-400 vs. DDR2-533 in dual channel configurations, and non dual channel configurations.http://forum.notebookreview.com/showthread.php?t=13314
Yes, I remember reading this thread a while back. This is the most important observation: 1xDDR2-533 = 2xDDR2-533 = 2xDDR2-400 > 1xDDR2-400
As long as one is using Dual-Channel mode, the bus is fully saturated with either PC2-4200 or PC2-3200, so 533MHz memory is no faster in this case.
However, when only ONE stick of RAM is present, the PC2-4200 will give ~10% increase over PC2-3200.
So for the person who originally started the thread, you can get either PC2-4200 or PC2-3200 memory to supplement the memory you already have. Once dual-channel mode is activated, your laptop will have maximum memory performance.
For those of us who have 2xPC2-3200 memory, there is absolutely no benefit in swapping for 2xPC2-4200 memory.