New Memory

[michaelsil1]

I have been away for awhile and was wondering if there is a new memory standard available. I've been hearing something about 4X DDR; what is it and is it available.

 

[bum_jcrules]

There is QDR - Quad Data Rate for SRAM and SDRAM. Is this what you are talking about?

<A HREF="http://www.qdrsram.com" target="_new">http://www.qdrsram.com</A> The site seems to be down right now.

Or are you talking about Rambus' Yellowstone? It is a supposed ODR - Octal Data Rate... This remains to be seen. Last I saw it looks like a high speed DDR signal.

<A HREF="http://www.rdram.com/products/yellowstone/odr/" target="_new">http://www.rdram.com/products/yellowstone/odr/</A>

Ass you can see in the diagram on this page it uses 4 cycles per one system clock signal wave. In essence it is four times faster than the system clock. Not a true ODR signal.

QDR uses a true 4 bits per signal cycle.


If it is something other than these please let me know what it is so I can learn about it.

<b><font color=red>Fredi</font color=red><font color=red>Fredi</font color=red> He's our man! If he can't do it no one can!</b><P ID="edit"><FONT SIZE=-1><EM>Edited by Bum_JCRules on 01/14/03 10:34 PM.</EM></FONT></P>

 

[michaelsil1]

It must be the Quad DDR that I heard of; is it available and is it twice as fast as DDR memory.

 

[bum_jcrules]

It is called QDR SDRAM or QDR SRAM. Not QDR DDR SDRAM.

It will provide twice the peak bandwidth at the same clock speed.

<b><font color=red>Fredi</font color=red> <font color=red>Fredi</font color=red> He's our man! If he can't do it no one can!</b><P ID="edit"><FONT SIZE=-1><EM>Edited by Bum_JCRules on 01/14/03 10:42 PM.</EM></FONT></P>

 

[juin]

odr qdr ddr it all marketing

Now what to do??

 

[Crashman]

QDR will eventually replace Dual Channel DDR, dual channel boards are just now becomming available, so you're talking at least a year. Dual Channel DDR gets the same bandwidth as QDR but uses two existing standard DDR DIMMS.

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