Please register or login. There are 0 registered and 901 anonymous users currently online. Current bandwidth usage: 326.30 kbit/s July 29 - 02:50pm EDT 
Hardware Analysis
      
Forums Product Prices
  Contents 
 
 

  Latest Topics 
 

More >>
 

    
 
 

  You Are Here: 
 
/ Forums / Rambus PC-1066 and PC-1200, Pushing the Envelope
 

  RDRAM DDR RAM i850 nForce and fair comparison 
 
 Author 
 Date Written 
 Tools 
Gianni Rodosi Nov 17, 2001, 12:29pm EST Reply - Quote - Report Abuse
Private Message - Add to Buddy List Replies: 0 - Views: 444
Well, I have found your article interesting and realistic. I think, though, that it would be fair to compare single channel solutions against single channel solutions an dual channel against dual channel.
It is very easy to improve speed by just putting two memory buses in parallel.

In practice the non optimal performance of DDR + P4 (a la Via or Intel 845D) depends mostly on the lower theoretical speed of 1 DDR channel against 2 RDR channels, implementation and the uneven divisor of a 400 Mhz system bus and a 266 Mhz memory.

In my opinion, it would be more correct to compare nForce based solutions for the P4 with dual channel DDR (existing but unavailable on the market because of legal reasons) to the i850's and i860's. And even then there would be the divisor factor and we should consider that the P4 couldn't anyway take advantage of all the bandwith of dual DDR with its bus clocked at standard fequency.

As far as the Athlon platform is concerned, it can't get a big advantage of the dual channel DDR system of nForce because of its system bus bottleneck (64 bits by 266 Mhz). But here we are speaking of two different architectures the extra bandwidth in that case is used mostly for the needs of the integrated graphics adapter.

BTW, it would be interesting to see how much an Athlon system could take advantage of higher available bandwitdth. In my opinion Athlons are more conservative in bus usage in respect to P4's to achieve similar performance but in the end they will anyway benefit from it at one point or another.

What do you think about ?



Write a Reply >>


 

    
 
 

  Topic Tools 
 
RSS UpdatesRSS Updates
 

  Related Articles 
 
 

  Newsletter 
 
A weekly newsletter featuring an editorial and a roundup of the latest articles, news and other interesting topics.

Please enter your email address below and click Subscribe.