[Wien] AMD or intel CPU

[Peter Blaha]

Intel I7 cpus are SIGNIFICANTLY faster than AMD.

Make sure it is an I7 (not I5,..), because they have the fastest memory 
access and run best with Lapack/Blas (because of the mkl-library) which 
is very important.

At the moment Intel offers:

i7-3820  300$, 130W, 4 cores, 3.6/3.8GHz, 10MB cache, 4 memory channels
                                                 and 51.2 GB/s bandwidth
i7-3930K 600$, 130W, 6 cores, 3.2/3.8     12        ,  as above

i7-3770K 340$,  77W, 4 cores, 3.5/3.9   ,  8MB      , 2 memory channels
                                                    !!!!  25.6 GB/s !!!

So I would go clearly for a i7-3820  (or if you have more money) for a 
i7-3930K processor.

The last one (3770K) is produced in the newest technology (power 
saving), but I guess its memory bus is much slower!

Am 27.06.2012 13:53, schrieb ali ghafari:
> Dear Profs. Blaha and users
> We want to buy new computer for Wien2k calculation. The question is
> which kind of platforms (AMD or inlet) are suitable for Wien2k package?
> Best Regards
> Ali
>
>
> _______________________________________________
> Wien mailing list
> Wien at zeus.theochem.tuwien.ac.at
> http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>

-- 
Peter Blaha
Inst.Materials Chemistry
TU Vienna
Getreidemarkt 9
A-1060 Vienna
Austria
+43-1-5880115671