On Tue, 22 Apr 2008, amjad ali wrote: > > The othe CPU side - its balanced by FSB1600 => > > Bandwidth = 1600MHz * 8(bytes bus)* 2(CPU-chips) = 25.6GByte/se > > > > So generally all the 3 things you've listed has to *match* correctly. > > [Some CPUs and chipsets support multiple FSB frequencies - so have to > > check what freq is set for the machine you are buying.] > > Currently I am making a gigabit ethernet cluster of 4 compute nodes > (totaling 8 cores), with each node having > One Processor: Intel Core2Duo E6750 2.66 GHz Processor, FSB 1333MHz, 4MB L2. > Motherboard: Intel Entry Server Board Intel S3200SHV with intel 3200 Chipset > supporting 1333/1066/800 MHz FSB . > RAM: 2GB DDR2 800MHz ECC System Memory. > > What memory-bandwidth/CPU-core will be there for this system? > Any other comment/remark? > My area work deals in sparse matrices. > I near future I would like to add 12 similar compute nodes in the cluster.
http://www.intel.com/cd/products/services/emea/eng/chipsets/374398.htm It says 12.8 GB/s for DDR2-800. I think the CPU with 1333 => 10.7GB/s It would be unbalanced - and I don't know how this will affect things.. [Perhaps it will perform better than DDR2-677 RAM] > On such a cluster what if I relapce "C2D 2.66 GHz FSB1333 processor" with > "Intel Xeon 3070/3075 2.66 GHz FSB1066/1333 processor"? Would there be any > significant improvement in performance? I doubt it will make a difference. But this is unproven speculation. Satish
