Dual DDR400MHz question

[Cain_tommy]

I've got a A7N8X motherboard with an AMD 2100+ and TwinMOS PC3200 DDR-DIMM 256MB.

Having 256Mb RAM ain't cutting it so I need more. Not to mention that just one RAM doesn't fill the motherboards potential.

So I want more RAM and before I buy it I want to check with you guys.

I'm assuming that buying another TwinMOS PC3200 DDR-DIMM 256MB won't be a problem. (install it on slot 0 and 2 or just 0 and 1? - does it matter?).

BUT - what if I buy a TwinMOS PC3200 DDR-DIMM 512MB?
Will that work?

Thanks for any info!

 

[Prof133]

I'm assuming that buying another TwinMOS PC3200 DDR-DIMM 256MB won't be a problem. (install it on slot 0 and 2 or just 0 and 1? - does it matter?).

Not a problem. One memory module in the offset memory slot and the other in either of the two remaining slots. The result: 512MB in Dual DDR and 512MB of total memory capacity.

BUT - what if I buy a TwinMOS PC3200 DDR-DIMM 512MB?
Will that work?

It will work. However, you won't have the full amount in Dual DDR. You'll have 512MB in Dual DDR - the lowest common density across the two channels times two - and 256MB+512MB of total memory capacity.


<b><font color=blue>I agree with that solution ... because it is a logical one.</font color=blue></b>

 

[Cain_tommy]

I didn't quite understand your last comment.
If I buy a 512-module and activate the dual ddr in BIOS - will I only have 512Mb total then? (with a 256 and a 512 module).

Bonus question - How will three 256-modules work with dual ddr?

 

[Prof133]

If I buy a 512-module and activate the dual ddr in BIOS - will I only have 512Mb total then? (with a 256 and a 512 module).

* Dual DDR is automatically enabled. Cannot be enabled/disabled via BIOS.

* You'll have 768MB total but 512MB of it will be addressed in Dual DDR mode and 256MB of it will be addressed in normal mode.

Bonus question - How will three 256-modules work with dual ddr?

768MB total. 512MB in Dual DDR mode and 256MB in normal mode.

<b><font color=blue>I agree with that solution ... because it is a logical one.</font color=blue></b>