Confused about upgrading memory

[Aeneran]

Hi, i wish to upgrade my memory from 512mb to 1024mb. However after reading posts from other forums i am now confused. I used CPU-Z to find out my current memory. I have taken a screenshot of this and inserted it as a attachement. It says i have DDR-SDRAM (this type is crap right?) So do you think i would be able to remove this and install two sticks of 512mb DDR (this is better right?) Also how do i know what type i need because when i look on ebuyer for memory theres all this techical stuff ie:Crucial CT6464Z40B 512MB DDR 400MHz PC3200 CL=3 Memory Module. What does this mean?
I hope you can understand this.

 

[DJ-CHRIS]

You just need another stick of PC2700 or PC3200 DDR memory.

It's full name is DDR-SDRAM

 

[Aeneran]

Ok baisically at the moment i have 4 sticks of 128mb. So im going to remove these and insert 2 sticks of 512mb. So is DDR short for DDR-SDRAM? So could i buy 2 stick of these?

 

[DJ-CHRIS]

Since you have 4 sticks of 128, yeah I would recomend ditching all the cheap sticks.

DDR is short for DDR-SDRAM as well.

And yes, those kingston ram sticks should work very well.

 

[Aeneran]

Ok thanks for that, you have helped me clear a few things up.
One other thing i read somewhere that you have to match the pins up to youre motherboard or something like that. Because you can buy 184 pin memory etc. Is this true?

 

[DJ-CHRIS]

Yeah, and all DDR memory *excluding a few HP systems* are 184 pin and the pin's in the same place

 

[Aeneran]

Ok thanks. I will be ordering that memory very soon.