Is it ok to use 1GB + 256MB RAM in Satellite P25-s607

Question

I have a Satellite P25-s607, and I wanted to know the following:
1) if it's ok to install only a single 1GB stick of RAM next to a 256MB stick? Will I lose any performance speed doing this versus 2 1GB sticks (assuming I use under 1GB of RAM at most times)? Sounds like it will not have a performance hit since this model doesn't support dual-channel memory (according to crucial.com)
2) I assume this is the correct (best) module to use: [1GB, 200-pin SODIMM, DDR PC2700|http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=3B53A794A5CA7304] with specs:
# Module Size: 1GB
# Package: 200-pin SODIMM
# Feature: DDR PC2700
# Specs: DDR PC2700 CL=2.5 Unbuffered NON-ECC DDR333 2.5V 128Meg x 64
3) Is there any reason to install BIOS 2.10? It is listed under the toshiba support site under P25-S607-related, but the only change it states is: "Added support for the Pentium 4 D1 stepping CPU"
4) Is it possible to install a better CPU? I assume not...
5) What about graphics card (it came with NVIDIA® GeForce? FX Go5200 graphics controller; 64MB DDR external video memory)? Also I assume not...
Thanks for any help!!

Answer 1

Hi
Regarding the question number:
1) The notebook can be upgraded up to 2GB RAM and therefore you can use one 1GB RAM and one 256MB module. But its always better if you would use the identical memory modules. Its better for performance but I doubt you will notice an performance boost.
2) Yes, you have to use the 200-pin SODIMM, DDR PC2700 modules
3) If your notebook runs trouble free then I dont see any reasons for a BIOS update
4) Usually its not advisable to upgrade the CPU due to a higher heat dissipation and overheating risks due to a higher CPU performance
5) No, this is definitely not possible because the GPU is fixed on the board
Greets