Trying to add more memory ... but look at this warning

[LuckyTaxi]

The following note was from pcboost.com's website. I am trying to add an additional 128MB to a system with
256MB. I only have one more slot available. There are three slots, with two already filled up with 128MB each.
I'm lost ... can I add the extra 128?!

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SOME OLDER PENTIUM II / III BASED SYSTEMS CAN NOT TAKE THE CURRENT 128MB MEMORY MODULES. IF YOUR SYSTEM CAN ONLY ACCEPT 128MB PER SLOT MAXIMUM - A TOTAL MAXIMUM MEMORY OF 256MB (2 MEMORY SLOTS) OR 384MB (3 MEMORY SLOTS) NONE OF THE CURRENT GENERATION 128MB MODULES WILL FUNCTION PROPERLY. FOR THESE SYSTEMS WE RECOMMEND YOU CONTACT THE SYSTEM MANUFACTURER DIRECTLY FOR MEMORY UPGRADES

 

[AndyHui]

Please read the AnandTech FAQ: What is High Density SDRAM, and does it have problems with BX motherboards?

 

[LuckyTaxi]

Still lost ... so I have a MB that can hold 384, but yet I can't use the whole 384?

 

[AndyHui]

What you need to do is make sure you purchase a low density DIMM, as described in my FAQ. Most of the PC133 SDRAM available today is high density stuff, meaning that it cannot all be addressed by older boards. Use Crucial's RAM selection system to check what DIMMs you can buy.

 

[LuckyTaxi]

ahhh ... i have a PC100 ... it should be ok?

On the website it says :

168pin, 128MB PC100, 100MHz SDRAM, 16x64
Lifetime warranty

 

[AndyHui]

PC100 is generally low density stuff.