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To: unclewest who wrote (27557)8/24/1999 10:08:00 AM
From: richard surckla  Respond to of 93625
 
MEMORY TRANSLATOR HUB (MTH)...

----------------------------------------------------------
PC133 SDRAM fills in Intel's
chipset gaps

By Jack Robertson
Electronic Buyers' News
(08/23/99, 02:19:26 PM EDT)

A shortage of Intel Corp.'s 440BX and 440ZX chipsets has
caused an upturn in demand for competing devices that
support PC133 SDRAM, industry executives said.

Via Technologies Inc., for one, has seen a sharp increase in
sales of its next-generation PC133 core-logic chipsets, said
Dean Hays, director of marketing for the Fremont,
Calif.-based company. ?It's made it an easy decision for
buyers to skip Intel and jump on the PC133 bandwagon,?
said Hays, whose company has openly waged war against
Intel.

Industry watchers agree that the Intel chipset shortage is
prompting some PC OEMs to take a closer look at PC133.
And some ?have simply become earlier adopters,? said
Semico Research Corp. analyst Bob Merritt, who is based in
Redwood City, Calif. ?As long as they were planning to
switch this fall anyway, they went ahead to order PC133
chipsets and boards now from the Taiwan independents,? he
said.

Intel has no PC133 chipset because it had planned to move
from 100-MHz SDRAM to the forthcoming Direct Rambus
DRAM. However, due to delays of Direct Rambus and Intel's
own Camino chipset, several OEMs have planned to add
PC133 memory to PCs this fall. Intel is now considering a
PC133 chipset of its own, but has yet to announce any
specific plans. Even if the Santa Clara, Calif.-based
microprocessor giant were to adapt one of its new chipsets
to support 133-MHz SDRAMs, the product wouldn't be
available until the first half of 2000, according to an Intel
spokesman.

Sources believed the short supply of BX and ZX chipsets
was partially caused by Intel's own production transition to
its next-generation 810, 810e, and 820 Camino chipsets.
And Merritt questioned whether Intel orchestrated the
production shift to pressure OEMs to move more quickly to
the new chipsets.

As it has turned out, however, some computer makers
appear to be doing the opposite, switching to the new
PC133 chipsets from Via, Acer Labs, and other
Taiwan-based suppliers.

Intel has said its 810e and Camino chipsets will support
SDRAM memory, but only 100-MHz chips. Jim Handy, an
analyst at Dataquest Inc., San Jose, said most OEMs would
just as soon use PC133 SDRAMs if a core logic chipset
were available. In fact, PC133 yields will increase to the
point that they become the predominant SDRAM available in
the market, he said.

With PC133 becoming prevalent in PCs this fall, Intel has
come up with a transition strategy to allow board makers to
use a common design that won't have to be changed in order
to shift to Direct Rambus RIMM modules. The strategy
involves use of what Intel calls a Memory Translator Hub
(MTH) to connect either SDRAM DIMMs or Direct Rambus
RIMMS to the Camino chipset.

However, MTH only supports 100-MHz SDRAMs. As OEMs
and motherboard makers adopt PC133 memory, somewhat
fueled by the Intel BX and ZX chipset shortage, interest
lessens for the MTH PC100-only board.

Even so, Taiwan motherboard makers are still building
product with as many of the 440BX and 440ZX chipsets as
they can get. Taiwan suppliers still expect the Intel chipsets
to comprise nearly half their motherboards in the second half
of 1999.

ebnews.com



To: unclewest who wrote (27557)8/24/1999 8:22:00 PM
From: Stuart Steele  Read Replies (5) | Respond to of 93625
 
RAMBUS INC
New short - 5,037,448 Old Short - 5,142,644 -2.0
I was dead wrong on the shorts this month.
Stuart



To: unclewest who wrote (27557)8/24/1999 11:42:00 PM
From: Dan3  Respond to of 93625
 
Re: here are some comparisons.

That puff paper has been on the samsung site for awhile. But it mixes and matches characteristics of PC100 and PC133 while ignoring VC, DDR, rambus 600, and rambus 700. A couple of issues:

>>>>The 133 MHz SDRAM interface, with its coarse timing granularity of 7.5 ns, incurs a mismatch with the timing of the memory core which increases the component latency significantly, to 45 ns.

That's incorrect, although all rambus core runs at 100MHZ, PC133 core runs at... 133MHZ, PC166 at 166MHZ etc. (There are a few parts available at 166 now, won't be a factor till next year)

VC DRAM, ESDRAM, and DDR DRAM improve on the latency, burst speed, or both over PC133, and they all do it a lower cost than rambus.

This leaves us a virtual tie between cas 3 PC133 75ns to transmit 32 bytes and the fastest speed grade of Rambus 800 (45ns) at 73 ns.

But VC DRAM saves one clock and fills the line in 68ns, DDR doubles the burst rate and so fills the line in 60ns, and VC DDR fills the line in 53ns.

VC and DDR also come without the fingernails on the blackboard requirement for royalties.

Regardless, for the past few days, at least, the market agrees with you, and disagrees with me.

Regards,

Dan