What is the Difference between RDRAM and DRDRAM

[The Shovler]

I'm new to this computer stuff. Can someone help me.
What is the difference between RDRAM, and DRDRAM?
My current motherboard (IWILL DS133R) uses DRDRAM. The motherboard (Shuttle AT31) I would like to buy uses RDRAM.
Would that be compatible? With all the new ram, I get confused.

Thanks:mad:

[Weazel]

DRDRAM, RDRAM, RAMBUS, its all the same you shouldn't have any problems