Rambus (RMBS) - Eagle or Penguin Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : Rambus (RMBS) - Eagle or Penguin

RMBS 88.13

+1.0%

Nov 21 9:30 AM EST

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: tinkershaw who wrote (75225)	7/1/2001 10:40:02 PM
From: Dan3	Read Replies (1) of 93625

Re: There is nothing of objective truth in the vast majority of the posts I am receiving Look here: samsungelectronics.com Then look here: samsungelectronics.com Note the time it takes to get a byte of information out of Rambus RDRAM 800: 45 or 53.3 nanoseconds (there are two speeds available) Now look at the time it takes to get a byte of information out of DDR 266: It comes in two speeds, 7.5 nanoseconds and 10 nanoseconds. There is a 2 cycle delay (CL2) or a 2.5 cycle delay (CL2.5) your choice, depending on the part you order. The slowest DDR266 is 2.5 times 7.5 + 7.5 nanoseconds to read or 26.25 nanoseconds to deliver data in response to a read request. The fastest RDRAM is 45 nanoseconds - it takes significantly longer to perform a short read from the fastest RDRAM 800 than it does from the slowest DDR 266. RDRAM is slower because it's slower. I don't know what simpler language to use for you. RDRAM 800 has a 1.6GB/sec data rate while DDR 2100 has a 2.1GB/sec data rate. Because it's slower, RDRAM is never used with fewer than 2 channels, whereas DDR is almost always used as only a single channel. The cost of implementing an RDRAM channel is as high or higher than the cost of implementing a DDR channel because the RDRAM specification is a very tight one and the extra pins needed by DDR are very cheap (the low cost of pins is the result of technology developed after RDRAM was conceived - and surprised just about everybody, most of all Intel). Rambus wasn't intended to be fast, it was intended to be cheap, which was to allow more channels to be used, which was expected to inexpensively provide something almost as good as fast memory. Read the datasheets. READ THE DATASHEETS! The memory in rambus is slow, the per pin speed is high, the bandwidth per channel is a little slower than DDR but almost all RDRAM motherboards use double the number of channels to make up for RDRAM being so slow, and the result is high bandwidth through the use of dual channels - not the use of fast memory. Available dual channel Rambus motherboards have a higher data throughput than available single channel DDR motherboards. Which is why they are generally more expensive (though with sales having been below plan quarter after quarter, surplus boards can often be found cheap). Rambus is slower. It's slower. Deal with it.

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next