To: Steve Lee who wrote (76538 ) 2/25/2000 12:01:00 PM From: Michael Bakunin Read Replies (1) | Respond to
Steve, did you not notice #reply-12967869 -- if not, some highlights
(follow the links -- have you got any good ones for us?) were:
"Correction: DDR-DRAM is much faster then Rambus. 100MHz DDR-DRAM
has bandwidth of 1.6GB/s, same as Rambus. 133MHz DDR-DRAM has a
bandwidth of 2.1 GB/s (that's giga *bytes*, btw, not bits).
DDR-DRAM, as well as regular SDRAM, also have a significantly
lower latency."
"There's a lot of noise made about the various merits of memory
types - my personal take on it is that it's mostly a wash, RamBus
drams do have some advantages - but for main memory systems they
are more in the future (and revolve around how many chips it
takes to make a minimum memory sized system as memory continues
to move down the memory density curve.."
Another good reality check for you may be here:
realworldtech.com ;
"The bad aspect of Direct Rambus is latency. Rambus Inc. likes to
say that its fastest DRDRAMs have the same 20 ns page access
latency as the fastest PC100 SDRAMs. This is technically true
when you consider the memory chip in isolation. But DRDRAM-based
memory systems differ from SDRAM-based systems in several
significant ways in how the chips are wired together and
communicate with the memory controller ASIC which add tens of ns
to the effective latency."
Then there's these:
inqst.com and inqst.com --->
"10-30% performance advantage for DDR over Rambus" and "When it comes to end-to-end bandwidth between processor and memory, Virtual Channel
SDRAM wins among memory types"
Need any more links? have you got any for us -- any
that are not from Intel, Rambus & Cie.? -mb
