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Technology Stocks : Rambus (RMBS) - Eagle or Penguin
RMBS 88.13+1.0%Nov 21 9:30 AM EST

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To: Bilow who wrote (40093)5/22/2000 2:43:00 AM
From: Bilow  Read Replies (4) of 93625
 
Hi all; So much for RDRAM running cooler than SDRAM. Anandtech took temperature measurements as follows:

PC133: 93.2
PC800: 98.6

anandtech.com

Compare the above to the sham engineering calculations posted at dramreview:

SDRAM: 6.5 Watts
DDR: 6.2 Watts
RDRAM: 4.1 Watts

dramreview.com

Technical note: The surface area of the RDRAM heat sink is much larger than the combined area of the SDRAM chips, and so its thermal resistance to ambient is certain to be smaller. In addition, the PC133 temperature is being measured at the chip, while the RDRAM temperature is measured at the heat sink. Since there is thermal resistance between the heatsink and the RDRAM chips, it is clear that the RDRAM chips are actually hotter than the above measurement would indicate. Both these corrections will increase the temperature (and power) consumption differences between the two memory types, not decrease them. Anand didn't realize that these temperature differences are significant, in terms of indications of power consumption, but they are quite significant.

Anand didn't mention his ambient (i.e. room air) temperature. If we guess 72 F, then the SDRAM chips were 21.2 F over ambient while the RDRAM were 26.6. That means that the RDRAM was consuming at least 25% more power, quite a bit more if the technical notes of the previous paragraph are taken into account.

Conclusion: RDRAM IS A POWER HOG!!!, something the longs around here have just been unable to accept due to sham engineering calculations released by Rambus.

Dramreview should be totally ashamed that they were suggesting that RDRAM used 1/3 the power of SDRAM. But the bald faced |:@~& won't say a thing, I predict. PUMP SITE

Now even the rabid longs have to understand why it is that they don't see any mobile usage of RDRAM. (Even from Dell.)

-- Carl

Note that I already showed that the dramreview site is closely connected to RMBS former management in this post:

Rambus' Fake website?
Here's where you'll find informed analysis on where to turn and who to trust. #reply-13405397

Now you have to wonder. Why did someone so high up in RMBS management give figures reversing the power consumption mubers for SDRAM and RDRAM? Do you suppose that Rambus management might be watching their stock price just a little more carefully than their engineering?

Does anyone suspect that any of the other claims of Rambus are also totally incorrect? Or is this really the only blotch on their virgin pure reputation? Do you guys really trust Rambus?
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