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Ddr Ram Question


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#1 Demon Cleaner

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Posted 10 May 2007 - 06:44 PM

hi.my mum has 512 ddr pc3200 ram in her pc.i have been given 256 pc2700. my two questions are does it matter that there not the same speed and does it matter that there not the same size.ie mb's. i have heard that ddr likes to be installed in pairs!

hope that makes sense :thumbsup:

cheers arny

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#2 oldf@rt

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Posted 10 May 2007 - 09:10 PM

Arny

Unless the board needs dual channel ram, you dont need to install in pairs.

PC2700 and PC 3200 DDR support different timing. CAS 2.5 vs CAS 3.0. If the board supports both speeds, you can install the mismatched speeds, and the board will time to the higher CAS of 3.0. What system do you have?

Edited by oldf@rt, 10 May 2007 - 09:11 PM.

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#3 Demon Cleaner

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Posted 10 May 2007 - 09:40 PM

hi oldf@rt

.i dont know the specifics of the pc i just know that its got pc3200 already.i can swap out this 2700 for a 3200 256mb stick.was just wondering wether it should have another 512 or if 256 would be alright.its just to speed it up slightly cos xp needs 512 to operate properly doesn't it?!

cheers arny

#4 oldf@rt

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Posted 10 May 2007 - 10:15 PM

I always go by whatever M$ says, multiply by four ie, 128 really means 512. You can try the PC 2700 along with the 3200, but without knowing the mainboard model, I have no way of telling if the ram should work. More is always better. I would swap to a 3200 Dimm. 256 more would be better, but if you can add 512 to the 512 already in the computer would be better.
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#5 Demon Cleaner

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Posted 10 May 2007 - 10:17 PM

:thumbsup:

#6 dc3

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Posted 11 May 2007 - 10:58 AM

When mixing RAM of different speeds the modules will only run at the slowest module. If you mix PC3200 and PC2700 the RAM will only run as fast as the PC2700 module.

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#7 usasma

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Posted 12 May 2007 - 06:41 AM

It's likely that you won't notice the difference between PC3200 and PC2700. Also, while XP does run on 512 mB of RAM - over time it'll become "lodgy" and you'll need to clean it out. 768 mb or 1 gB will delay this point for quite a while.
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