Re: Links - the more you try to state your position without referring to links
I know, but I've posted the links here to the various mfgr. web sites several times and none of the rambus proponents seem interested in such things. The news about intel waffling on rambus has been posted by others, with links, daily for the past several days. I've also tried to get some idea of what, if any, application improvement is expected from rambus to justify its higher price - that is treated as irrelevant by most of the rambus proponents.
I agree with them that, on paper, putting interleaved memory on a chip to increase bandwidth, then pumping the data across a high speed serial bus sounds great - and that the 300/600 should have soundly outperformed PC100 - but it evidently didn't, and the details of just how bad it was are kept up in the attic with the other bad news. Was there actually some improvement over PC100, just not enough? What's the big secret?
Rambus 800 is a third faster than rambus 600, but otherwise the same. ES DRAM, VC DRAM, and DDR DRAM are also set to run a third faster than PC100, plus they have significant architectural enhancements that substantially increase that performance improvement beyond a simple clock speed increase.
These are some benchmarks comparisons:
necel.com
Here is another complete analysis:
www3.sharkyextreme.com
Here are some from micron:
micron.com
Showing 400/800 still at 40, 45, and 50ns for both 356/700 and 400/800 drdram
Now here is PC166:
micron.com
Showing latency as low as 8ns - the micron datasheet shows these parts support cas 1 !
Here is newest generation PC100 / PC133 - this is what is between 1/4 and 2/3 the price of rambus:
micron.com
it is listed as supporting cas 2 at PC100/PC133 and cas 3 up to 143
Here is Samsung's site - they are the one company that ships true rambus 800:
usa.samsungsemi.com
Here is Toshiba - data available soon for rambus - doesn't exist yet - maybe there will someday be two companies making computer grade rambus : - )
toshiba.com
These are LG Semicon / Hyundai sites:
hea.com
lgsemicon.co.kr
I've seem some move to dropping the 50ns 800 parts, whether that's due to production improvements or total rejection by the marketplace I don't know.
With everyone so afraid to allow any trace of performance information out, I can't say.
Dan |
