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ddr333 and ddr400


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#1 yethPC

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Posted 17 February 2010 - 07:51 PM

I would like to know whether it's possible to use ddr400 and ddr333 simultaneously on one board.Thanks

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#2 hamluis

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Posted 17 February 2010 - 08:33 PM

Sure...depends on what the board supports.

There's usually a range listed for the board...but I think all the basic DDR modules are backwards compatible. That is not to say that same is true for DDR2 or DDR3 or that you can mix either of those with DDR.

DDR333/PC2700 and DDR400/PC3200 when used together will run at the lower speed (PC2700).

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#3 yethPC

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Posted 18 February 2010 - 08:54 PM

Hi,
Thanks for your immediate reply.
I was wondering whether it could be possible to mix pc333 & pc400 on one board all at the same time.
My old asrock board couuld accept mixed modules but Im not sure with my new one.BTW,how would I know if my board supports mixed modules?
I tried to install 2 different 256mb ddr midules in two memory banks and what it all seemed to read off was just 256mb that would have been 512mb..Board can detect 256mb when installed one at a time so 256mb modules were ok.
I asked the mobo seller if it was possible and he just told me to modify bios setting to allow the board accept different modules but he didn't tell me which specific menu from the bios setup I would need to change.

Thanks

#4 hamluis

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Posted 18 February 2010 - 09:25 PM

Depends on if the board was a custom for someone like HP...or whether it's a retail board.

System manufacturer or motherboard manufacturer....and model?

Louis

#5 the_patriot11

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Posted 19 February 2010 - 08:19 PM

most boards will, however they will run at the slower speed. IF the board wasnt designed to run ddr400 its a moot point anyway, but if it was it both sticks will still run at 333 mhz.

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