M,

You're reading his original e-mail wrong. He didn't say AMD GPUs had a 30-40% advantage over NVidia. He's asking IF people would switch to AMD if that were true.

Personally, I think it would have to be much more than 30-40%. The next NVidia card would probably provide that kind of improvement, so most NVidia owners would just wait for the next generation of NVidia product to come out instead of switching to another processor and port their code. How much better? I'd say at least 100%. You can't just have better performance, you need an overwhelming performance advantage to convince people who are already using CUDA to switch. 30-40% isn't going to do it.

If you can't do that, you have to go after new users who haven't started using CUDA yet, provide them with a value alternative to NVidia. Since a lot of public codes already support CUDA, you'd have to go after users writing their own code, preferably at the start of a project who haven't already invested in CUDA.

Prentice

On 03/04/2015 02:33 PM, Massimiliano Fatica wrote:
Looking at the list:
FirePro s9150 has a score of 2.89/2.99 while the K40c has a score of 2.98/3.15.
Where is the 30-40% advantage?

M

On Wed, Mar 4, 2015 at 11:26 AM, Michael Di Domenico <mdidomeni...@gmail.com <mailto:mdidomeni...@gmail.com>> wrote:

    On Wed, Mar 4, 2015 at 2:07 PM, C Bergström
    <cbergst...@pathscale.com <mailto:cbergst...@pathscale.com>> wrote:
    > Frankly, it's visible we still aren't the best performance on some
    > codes.. Those issues basically fall into two camps and we're working
    > on it.
    > -----------
    > Having said this..
    > Would anyone build an AMD GPU cluster if
    > 1) The GPU was 30-40% faster than a K40
    > 2) It cost less
    > 3) OpenACC/OpenMP4/CUDA programming models were high performance
    and supported
    > 4) More oncard ram
    > -----------

    if the AMD's showed a 30-40% increase in performance over a k40, i'd
    buy them.  but our lock in with CUDA would make it difficult...
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