[gmx-users] some hardware questions

Mirco Wahab mirco.wahab at chemie.tu-freiberg.de
Wed May 2 18:13:04 CEST 2012

Hello Peter,

Am 02.05.2012 17:44, schrieb Peter C. Lai:

> You can wait for ivy bridge, then stick some Kepler GPUs (nvidia gtx
> 680) in it. That should max the performance. asm is pretty much stagnant
> for general purpose procs since core2 came out.

Is this true?

To my knowledge, the Fermi GPU (GF-110, eg. GTX-580) is
a 16 processor (streaming multiprocessor, SM) system, each
processor having 32 cores running at 1.5 GHz, and the
Kepler-1 (GK-104, eg. GTX-680) an 8 processor system
with 192 cores per processor at 1GHz.
Because on the Fermi each SM has more L1 cache than
each SM on the Kepler-1 and because it might be harder
to saturate 192 cores in a compute-scenario, I'd expect
the 580 (GF-110) to be significant(?) faster in the
next Gromacs (4.6). Maybe somebody tested this already.

(Here in Germany, I can by GTX-580/3GB for ~325€ + Tax.)



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