[TechSix]

Hello again guys,
I have 3GB of DDR2 RAM thats 2x 1GB and 2x 512MB.
I was wondering if it would be better to remove the 2x 512mb since they are running at 266mhz cause of my bios. I was able to get my 2x 1GB to run at 400mhz. Any thoughts?

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The difference in performance between 533Mhz and 800Mhz memory is noticeable if you benchmark the computer. In the real world it makes no noticeable difference.
That memory will only run at DDR2-800 if the processor supports it, if the board supports it and if the memory is DDR2-800 in the first place. If these factors are not all true the memory will run at an optimum speed.
All memory runs at the slowest link going, so while you can put 800 memory in alongside 533 memory, it will only run at 533.

[Neil Jones]

The difference in performance between 533Mhz and 800Mhz memory is noticeable if you benchmark the computer. In the real world it makes no noticeable difference.
That memory will only run at DDR2-800 if the processor supports it, if the board supports it and if the memory is DDR2-800 in the first place. If these factors are not all true the memory will run at an optimum speed.
All memory runs at the slowest link going, so while you can put 800 memory in alongside 533 memory, it will only run at 533.

[TechSix]

Thanks for your help.