U say what? RAM and Perfomance RAM? Unless you mean the normal consumer RAM and the Enthuasisast RAM. As for Lyst and all of that I dont understand what on earth that is.
Diffrences are latency timing and the expensive perfomance ones have been tested thouroughly so you dont end up with a dead one so better reliablility.
Her I will explain a few things:
DDR- Dual Data Rate. DDR is an improvment over SDRAM.
SDRAM reads once per cycle whilst DDR reads twice per cycle.
PC3200 etc refers to the bandwith.
DDR2- Essentially, it improves upon DDR by reading data at four times over a clock cycle. Other improvements include running at a lower voltage and hence a lower power, manufacturing at higher densities for larger memory capacities, and operating at higher clock speeds. This all sounds good, and it looks like a worthy successor, but it has this one downfall that pretty much defeats the speed gains: high latency. In order to achieve higher memory speeds, higher latency is introduced to provide a more stable operation (higher latency also occurs with larger chips). Latency specs are given as four numbers e.g. 4-4-4-12, and are given for a rated memory speed
Dual Channel- A technology developed soon after DDR was introduced, dual channel refers to increasing the bandwidth available even more by using pairs of DDR or DDR2 modules. Ideally, the two memory modules should be of the same brand and speed or basically the same everything (identical). Dual channel is actually a capability of the motherboard and not the RAM itself. Essentially, it doubles the available bus width, so the system accesses two channels at the same time versus one channel previously. As with all memory bandwidth, doubling it does not mean doubling performance. It only means that the bottleneck in the system is reduced i.e. there is more bandwidth available should the system activity require it.
Latency Timings- given as (this is an example) 4-4-4-12. Lower is better.
If FSB is say 800Mhz then DDR 400Mhz is the ideal RAM (actual clock speed is 200 Mhz)
Require- Unbuffered (Not registered)