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Discussion Starter #1
My laptop, Compaq Presario V2410CA came with 2 x 256MB DDR SoDimm PC2700 chips. Can I replace these with a 1GB DDR2 PC3200 chip? Is DDR2 the same as DDR?

Rob
 

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no, speed is different, and will not work in the computer, unless you get very lucky and the laptop can support both (very few, if any do)
 

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Discussion Starter #3
Can I use PC3200 DDR1 RAM? The laptop came with PC2700.

Anyone know where I can get a 1GB stick of this cheap??? Seems to be very expensive stuff.
 

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Ok, lets clear the air.

DDR2 is NOT compatible with PCs requiring DDR!!!

DDR modules are backward compatible with slower DDR modules in 99.99% of PCs, in otherwords you can use PC3200 in a machine that takes PC2100 or PC2700. The reverse is NOT true, PC2700 won't work in a machine needing PC3200. (it might, but the ram will clock down or it maybe unstable, usually the machine won't boot at all)

Some rare motherboards are PICKY, they only want the speed they originally came with. A notable case is the old Intel VX chipset, it HAS to have PC 66 RAM, PC 100 won't work. Another one is the old Gateways with 66MHz FSB PII CPUs, these need PC 66 and won't take PC100. It's been a LONG time since I've seen one of these picky boards.

Currenty, only the Intel platform with the latest chipsets like the Intel 9xx and Nvidia Nforce 4 Intel use DDR2 (VIA and others make a DDR2 chipset too). DDR2 modules are also backwards compatible, DDR2-800 can be used in amachine that uses DD2-533.

DDR modules have 184 pins for desktop modules or 200 for notebook modules, DDR2 has 240 pins. Notebook DDR2 has 200 pins, so check the label. (i'm not sure if they are keyed differently)
 
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