[gmx-users] Performance of NVIDIA GTX980 in PCI-e 3.0 x8 or x16 slots ?

[David McGiven]

Hey Mirco,

Your 1-3% claim is based on the webpage you linked ?

Is it reliable to compare GPU performances for gromacs with those of 3D
videogames ?

Thanks!

2015-06-11 13:21 GMT+02:00 Mirco Wahab <mirco.wahab at chemie.tu-freiberg.de>:

> On 11.06.2015 13:08, David McGiven wrote:
>
>> We're finally buying some Intel E52650 servers + NVIDIA GTX980 cards.
>> However, there's some servers that come with only PCI-e 3.0 x8 slots and
>> others with x16 slots.
>> Do you think this is relevant for gromacs performance ? And if so, how
>> much
>> relevant ?
>>
>
> It's more important to select PCIe 3.0 mode. Then, the difference
> between 16x and 8x is imho very low (1-3%).
>
> M.
>
>
> P.S.:
> http://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-Express_Scaling/
>
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