DDR stands for ?double data rate? and is actually a type of SDRAM. For instance, for an older computer you may purchase PC100 SDRAM, while for a newer computer you may purchase PC3200 DDR SDRAM. There?s even newer types of RAM known as DDR2 SDRAM and DDR3 SDRAM, but that doesn?t apply here.
Now, some motherboards support both older and newer RAM, but only one type at a time. That means you could use older, slower PC100 SDRAM or the newer, faster PC3200 DDR SDRAM.I believe that is the case based on what you are describing. To be sure, though, we need to know the model of the motherboard. If you aren?t sure, you can click here to download a free program called Everest. Install/run it and then go Motherboard->Motherboard to find out the make and model, then post the results here. From that we can tell you exactly what type of RAM you can/should you, how much you can install at one time, and what the best deal is at this time.
Let us know.
I have a P-4 1.7Ghz PC. In the PC's motherboard there are 4 slots available for RAM's. 2 are for SDRAM and the other 2 are for DDR RAM. Now i am making some changes in it. Firstly which type of RAM should i opt for SDRAM or DDR-RAM? Are SDRAM and DDR-RAM compatible?