Re: 2CPU+1GPU vs 1CPU+2GPU

From: Ajasja Ljubetič (ajasja.ljubetic_at_gmail.com)
Date: Mon Feb 13 2012 - 09:08:30 CST

>
> One final thing. I've done some benchmarking with a AMD 6-core desktop
> and a GTX-570 and it ends up being about equal (slightly faster) than a
> 6-core xeon with an M2070. You can buy a 3GB GTX580 for a fraction of the
> price of a M series card, and an AMD CPU (particularly the 3 GHz 6-core
> Thubans) will be close to half the price of the intel. While I'm sure the
> intel chip is generally superior to the AMD one, it doesn't seem to be a
> factor when running NAMD. So I would say buy two desktops and save
> yourself money and also gain performance. I know there is the lack of ECC
> memory with the GTX series, but I'm really not convinced that is a big
> issue for MD (maybe someone on the list has a different opinion).
>
>
I'm running my simulations on several GTX 560 Ti for half a year now and
it works great! So I would back up this advice.

Best regards,
Ajasja

> ~Aron
>
>
>
>
>
> On Mon, Feb 13, 2012 at 6:44 AM, Nicholas M Glykos <glykos_at_mbg.duth.gr>wrote:
>
>>
>>
>> You will (hopefully) hear from Axel on this, but :
>>
>> > as it would give more speed for our NAMD based simulations
>>
>> Is this an assumption or the result of benchmarking the two hardware
>> configurations with your intended system sizes ? For small (atom-wise)
>> systems, you shouldn't expect much improvement by increasing the number of
>> GPUs (and for tiny systems the 1CPU+2GPU may not scale at all).
>>
>> My twocents,
>> Nicholas
>>
>>
>> --
>>
>>
>> Nicholas M. Glykos, Department of Molecular Biology
>> and Genetics, Democritus University of Thrace, University Campus,
>> Dragana, 68100 Alexandroupolis, Greece, Tel/Fax (office) +302551030620,
>> Ext.77620, Tel (lab) +302551030615, http://utopia.duth.gr/~glykos/
>>
>>
>
>
> --
> Aron Broom M.Sc
> PhD Student
> Department of Chemistry
> University of Waterloo
>
>

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