Memory Recomedation?

[Mir96TA]

I need to get 1 Gig Dual DDR Kit.
I hoping to get with Low Latency like 2 Cascade or some thing.
It going to be going in Dell 400Sc Desktop Machine
I already have 1 Gig in Dual Mode with 2.5 Cascade
Chipset is P875
CPU is Prescott 3 Gig
So please tell what are some known Good Brand for the Value.
I do not want to over kill it or get Factory Over clocked.
So please advise me some good brand or kit

 

[Lemon law]

Since no one else is responding---short answer---some more of exactly what you have now---assuming you have a 4 memory slot motherboard---with 2 of the four slots now presently populated---anything faster will default to your existing slower speed---and anything slower will drag your existing ram down to its speed.

To eliminate any chance of memory incomparability problems---more of what you have now is the easy answer.

 

[Mir96TA]

This is what I have in two memory Bank out of four.
Pic
I always thought they run independently cause they are running it is on memory Channel ?
Please advise