11.
Here's an interesting article comparing DDR / DDR2 / DDR3
http://www.lostcircuits.com/memory/ddr3/
-A few selected quotes from the article
"Whereas current DDR (I) is capable of running at 400 MHz data rate with one penalty cycle each for the Bank Activate (tRCD), the Read (CAS) delay and the Precharge Delay (tRP), that is, at 2:2:2 latency settings, DDR-II will incur three penalty cycles for each of the above mentioned parameters, and run at 4:4:4 at the same operating frequency."
"The numbers just mentioned only hold for Read accesses, on Writes, the situation is slightly worse. DDR (I) writes are executed at CL-1, that is, immediately after a write command is given and without any penalty cycles. In DDR-II, the Write CAS Delay is specified as Read latency minus 1, that is, a CL-4 module will run at a write latency of 3 clocks."
Opinion on seeing AMD giving the Athlon64 a DDR2 memory controller
http://www.overclockers.com/tips00701/
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Posted by: orangefsh
|
Date: 12/24/04 04:00:59 AM]
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