http://www.via.com.tw/en/products/ch...series/p4m266/
It looks like the chipset supports both SDRAM (PC100 or PC133) and DDR.
Everest home edition (free from
http://www.lavalys.com/) can tell you
whether you have SDRAM or DDR, although I don't know whether it's completely
reliable for that.
Usually, the memory is run synchronized to the processor's FSB (front side
bus) frequency. A P4 with a 400 MHz FSB needs DDR200 (=PC1600) memory at a
minimum, and a 533 MHz FSB needs DDR266 (= PC2100) memory or faster.
However, DDR333 (=PC2700) and DDR400 (=PC3200) memory can usually be run at
the lower frequencies. (I don't recall whether I have ever seen PC1600 for
sale; don't bother looking for it.)
If you can identify the mainboard
(
http://www.viaarena.com/default.aspx?PageID=17&CID=36 ), you may wish to
visit
www.crucial.com. For example, if it's an ECS P4VMM, Crucial lists
PC2100, PC2700, and PC3200 DDR DIMMs for it, plus their high performance
Ballistix memory (expensive).
I'd expect generic non-ECC DDR DIMMs, PC2100 or better, to work. The ECS
board above can even take 1 GB DIMMs, if the expense is tolerable.
HTH.
Bob Knowlden
Address may be scrambled. Replace nkbob with bobkn.
<(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>I have a no-brand name computer with a Via P4M266-8233 mainboard, a
> ViaProSavageDDR P 4M266 chipset, and 256MB of RAM (as determined by a
> couple of utility programs (Belarc and Dr. Hardware).
>
> When I purchased the computer, it supposedly used DDR SDRAM. My
> question is which DDR SDRAM? DDR PC1600, PC2100, or PC2700. Is there
> an easy way to tell what kind of DDR SDRAM it is because I want to add
> 256MB or 512MB to the system?
>
> John
>