[Wien] 2 XEON 5355 or 4 XEON 5150?

[Matyáš Novák]

Q Z napsal(a):
>
> Dear All,
>     We plan to buy a new computer for Wien2k calcualtion. There are 
> two choices, one is use 2 quad core CPU (Intel XEON 5355),the other is 
> use 4 dual core CPU (XEON 5150). Which one is better for parallel 
> calculation?  Somebody told me that the speed is slow down  if runing 
> a job in parallel using the 8 cores of  2 XEON 5355. Is it right?  
> Thanks in advance.
>
Dear QZ,
the intel xeon scale pretty good up to four cores on one FSB - so if you 
can choose bettwen two computers with 2x2cores and one with 2x4, the 
first choice is imho better.
Matyas Novak