2GB of RAM advice

I want to upgrade my ram to 2GB by adding another 2x512MB sticks of same type. Since I have San Diego chip do you think I can run all of the 2GB at 400Mhz and dual channel. Of course at 1T timing.
Any advice appreciated.

Running 2 gigs (4x512) at 2T 400 speed with San Diego as shown below.  Bios default settings work for that WITHOUT having to overclock.  Could run 2 gigs at 1T 400 Speed with two 1 gig sticks and proper bios.  The user manual is not up to date for Venice and later processors.

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