DDR ram is it backwards compatible

[Ravenit]

I have a moterboard that can run up to pc2700 / 333mhz ram, can I use a stick of pc3200 / 400 mhz ram ram? If yes can they be mixed together like say PC 100 and 133 on a 100 mhz bus.
Thanks

 

[pillage2001]

YEs.

 

[AndyHui]

You can mix DDR SDRAM with other DDR SDRAM and DDR SDRAM speeds.

You cannot mix DDR SDRAM with SDR SDRAM. Different voltages, different number of pins.

 

[Deeko]

sure can.

 

[Ravenit]

Thankyou