[CentOS] Re: Opteron Mobo Suggestions

[Peter Arremann]

On Thursday 23 June 2005 17:54, Ed Clarke wrote:
> So what is the bottom line?  None of the common board makers such as
> Asus, Iwill, Tyan, Supermicro and Gigabit make a "good" board?  So
> what should the poor server builder do?
Lets be realistic here... all I/O on one CPU only makes a difference for the 
most IO intensive apps (talking several hundret MB/sec or more)... 
Memory on only one CPU is a bad thing though if you can avoid it. I ran a Tyan 
board though several benchmarks - anything from db2 to http... All tests were 
run with 2 GB - the difference was 4 modules attached to both cpus, or 2 
modules on just one... All DDR266 registered. The difference was between 0 
and 11% on DB2 ... With the data AMD provides I expected it to be much less 
than that but maybe IBM is doing something funky there... 

Anyway, long story short, try to avoid boards that attach all memory to one 
cpu - unless they cost so much less that you can add another gig or two in 
memory... I/O on the other hand, while not ideal, will have much lesser 
effect on your performance. 

Peter.