[[What is the difference between PC2100 (DDR266), PC2700 (DDR333), and
PC3200 (DDR400)?
PC2100 (DDR266) memory, PC2700 (DDR333) memory, and PC3200 (DDR400) memory
are all types of Double Data Rate (DDR) SDRAM. The varying numbers refer to
the different speeds of memory your computer was designed for.
Let's take a look at PC2100 (DDR266) to break it down simply.
PC2100 refers to the bandwidth of the memory. A PC2100 module has the
bandwidth of 2.1GB/sec therefore it is referred to as PC2100.
DDR266 refers to the effective front-side bus speed of your system. While
your DDR system or motherboard may operate a 133MHz front-side bus, its
effective front-side bus speed is 266MHz because DDR effectively doubles the
amount of data transferred per cycle that a non-DDR system would.
The same holds true for PC2700 (DDR333) which has a bandwidth of 2.7GB/sec
and is designed for use in systems and motherboards which require a 166MHz
front-side bus, with an effective front-side bus speed of 333MHz.
PC3200 DDR (DDR400) has a bandwidth of 3.2GB/sec and is designed for use in
systems and motherboards which require a 200MHz front-side bus with an
effective front-side bus speed of 400MHz.
Though DDR memory was designed to be backward compatible (meaning you can
use PC3200 DDR in a computer designed to use PC2100 DDR or vice-versa), we
always recommend that you use the Crucial Memory Selector to find exactly
the right memory for your computer. ]]
FAQ
http://www.crucial.com/kb/answer.asp?qid=4003
--
Hope this helps. Let us know.
Wes
In
Joseph Smitgarten said:
Called PCBOOST this AM, and was told it was indeed shipped on Monday,
second day air. So, it should arrive today. I hope it is the correct
ram, as I have a stick of ram in my PC that on the label says PC3500,
but SiSandra rates it at PC2700. Plus, when my computer boots up, it
says 333mhz for the memory, even though I have it set to 200, which
should then show 400mhz. The sticker also says, "Warranty void if
removed", meaning the heat clamp. But if I removed the clamp, I am
sure I would see PC2700 marked on the chips. <sigh>
Wayne