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Increasing speed by increasing RAM?

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Increasing speed by increasing RAM?

I have an older laptop TOSHIBA Satellite L25 S1216 circa early 2006 with 1.25 GB of RAM (DDR2). I would like to increase speed. One of my goals is to increase the speed at which I can move to different pages in a PDF document during an online WebEx document sharing interview. It currently takes time (about 8 seconds) to "load" when I move to a different page. This time can add up over the course of an interview. Even the rate at which typed characters appear on my screen is slow sometimes.

QUESTION:
I am thinking of moving up to 2GB of RAM by replacing the factory 0.25 GB (250MB) RAM chip with a 1GB RAM chip that matches (in terms of clock speed 667MHz) the 1GB I previously added (years ago) to the factory 0.25GB. Would this likely help?

The TOSHIBA specs for the laptop say that dual-channel support requires two memory modules of same capacity and clock speed. The capacities of the two current memory chips differ (1GB & 0.25GB) and I think the clock speeds may differ too (667MHz & I think the 0.25GB is 533MHz)

Thank you,

CCT (Bob)

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