Thanks, Joshua. It's quite helpful. Hope someone can give some idea whether the Hz or the QPI is relatively important in computing.
Huang On Thu, Aug 27, 2009 at 4:41 PM, Joshua Wiley <jwiley.ps...@gmail.com>wrote: > Dear Huang, > > I do not know how either of these run R in particular. However, the price > difference is because the E5540 is a newer line of chip architecture than > the W3540. One of the differences is the speed that data can be transferred > to and from the chip (Intel now calls it the QPI, it used to be called the > front side bus or just FSB). > > E5540's QPI speed is 5.8 gigatransfers per second > W3540's QPI speed is 4.6 gigatransfers per second. > > You might also be interested in how much power they take. > > E5540 uses a maximum 80 watts > W3540 uses a maximum 130 watts > > They both handle the same type (DDR3) and speed (1066) of RAM. > > If you want more details about them google > > "Gainsetown" the E5540 architecture codename > "Bloomfield" the W3540 architecture codename > > I doubt you would see a big performance difference either way, but I cannot > say that for certain. > > I hope that at least gives you a bit more information about them. Sorry I > cannot give a straightforward answer. > > Best, > > Joshua > > On Thu, Aug 27, 2009 at 1:00 AM, huang min <minhua...@gmail.com> wrote: > >> Dear All, >> >> I am considering to buy a workstation. For the CPUs, I wonder whether >> anybody have the experience in choosing one for the R. >> >> >> Intel Xeon W3540 2.93 8MB/1066 QC CPU is much cheaper as compared with the >> Intel Xeon E5540 2.53 8MB/1066 QC CPU. However, its Hz 2.93 is bigger than >> 2.53. I wonder which one would run R quicker. Thank you. >> >> >> >> Huang >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > Joshua Wiley > Senior in Psychology > University of California, Riverside > http://www.joshuawiley.com/ > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
