What RAM specification are important when adding RAM

[Lao Tzu]

I have a laptop with 512MB DDR2 RAM. What all specs need to match if I buy another stick? I know I need PC4200-DDR2, laptop and DDR2-533 (I assume 533 Mhz).

These are the specs given by crucial after a system scan.


DDR2 PC2-4200 • CL=4 • UNBUFFERED • NON-ECC • DDR2-533 • 1.8V • 64Meg x 64


If I buy a stick of 512MB on ebay for $30, what all do I need to match up to get it to work and what all is automatically matched up? Would a stick of SODIMM PC4200-DDR2 at 533 Mhz automatically work in my system and is all ram NON-ECC & unbuffered? I don't know what several of these terms mean so you know. I just want to know what all specs I need to match up when buying ram on ebay.

 

[WODIN]

has to be the same mhz cycle and DDR class

 

[Dial_tone]

if you are not positive what you need I would avoid ebay. Go to crucial.com and use their wizard thing to find what you need. Their prices are pretty good too.

 

[all the whey]

 

[WODIN]

if you are not positive what you need I would avoid ebay. Go to crucial.com and use their wizard thing to find what you need. Their prices are pretty good too.

Yep crucial rocks.

 

[jestro]

I have a laptop with 512MB DDR2 RAM. What all specs need to match if I buy another stick? I know I need PC4200-DDR2, laptop and DDR2-533 (I assume 533 Mhz).

You also need to know how many pin it is. On desktops you do anyway. Mine is 184-pin. Thats the shape of the stick.
Look in here:
http://www.memorystore.com/upgrades_system.asp?cboSystem=29895
Thats my system.

 

[Lao Tzu]

if you are not positive what you need I would avoid ebay. Go to crucial.com and use their wizard thing to find what you need. Their prices are pretty good too.

I did, but their ram is $50 a stick. But I did get the specs they were offering from them.

http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=111E9A99A5CA7304

DDR2 PC2-4200 • CL=4 • UNBUFFERED • NON-ECC • DDR2-533 • 1.8V • 64Meg x 64, 200-pin SODIMM