Nvidia GTX 970 in MacPro 3,1 Poor performance ?

in Current Mac Hardware edited September 2015

Hi Everyone , I just put my new GTX 970 in my macpro early 2008 today !


Everything is working (my 3 screens via DVI (2X) and display port (1X).


I downloaded the latest webdriver and CUDA drivers.


BUT , When i run for exemple the cinebench test from MAXON I only have 35 FPS, which is

my previous score with my ATI Radeon 5870 1G memory... I saw a guy making the test on youtube he has 114 FPS !!!


I also tested premiere with CUDA but I didn't notice any gain in the workflows or on the effects CUDA is supposed to accelerate.

Same in adobe media Encoder , I did rendering with my old ATI : 25 Minutes and with the new gtx : 24:30  ???


Does someone have an idea about that or do I miss something ? I saw some people playing with <key>Kernel Flags</key>  

<string>nvda_drv=1</string> and things like this ??? but I didn't need that for the card to work...


Anyway, thank you very much to anyone with help because for now I'm very disappointed with my new GTX .



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