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Subject: Re: LATENCY for RAMBUS/DDR/SDRAM > Mr. Hyatt

Author: Aaron Gordon

Date: 01:17:14 04/19/03

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On April 18, 2003 at 23:57:45, Robert Hyatt wrote:

>On April 18, 2003 at 18:57:29, Joshua Haglund wrote:
>
>>>
>>>RAMBUS ram has a pretty good bandwidth number.  The problem with it is it also
>>>comes with a pretty bad latency number.
>>>
>>>I've run Crafty on most everything and I get the best performance on SDRAM.  DDR
>>>is next with RAMBUS in third place.
>>
>>What would those latency numbers be?
>>
>>Thanks in advance,
>>
>>Joshua
>
>
>Recent testing put registered DDR RAM at 150 ns on my dual xeon 2.8ghz
>Dell box.
>
>SDRAM was at 120ns.
>
>I don't have any RAMBUS boxes around that I can test on so I can't give
>real numbers there, hopefully someone else will run lmbench on a non-overclocked
>RAMBUS box and report a real number.  If not, I'll try to get one tested next
>week.

Don't forget an Nforce2 with 166mhz(333DDR) DDR ram was 100ns. No overclocking.



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