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Not seeing increase in speed with dual GTX880m (16GB in SLi)- Premier CS6 or CC

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-I've enabled the "hack" so CUDA is recognized in Premier CS6 and CC but I don't see any difference in speed between software and CUDA. Machine: OEN17-SLI i7 4810mq 2.8ghz 32gb Hyperx 1600 Dual GTX880m in Sli 512gb SSD in raid0 thoughts on this?

-I've enabled the "hack" so CUDA is recognized in Premier CS6 and CC but I don't see any difference in speed between software and CUDA.
Machine: OEN17-SLI
i7 4810mq 2.8ghz
32gb Hyperx 1600
Dual GTX880m in Sli
512gb SSD in raid0
thoughts on this?

The replay answer
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In a laptop I am wondering if they really can support two PCIe X16 lanes.  I would suggest that you download GPU-Z and look at this
This when the GPU is working hard this is what you should see, when not working it throttles back to  "@x16 2.0"  or to @x16 1.1" .  But at least it is running with x16 lanes of the PCIe bus.  In desktop systems when you install two GPU's it is not uncommon to see one or both fall back to x8.  GPU-Z can run multiple instances so you can have two of these screens running and set one to each GPU.  If this shows a throttling problem I doubt that there is any way around it.
Next lesson for the day is to then look at the Sensors TAB on the top of each and this is what you will see:
Notice the GPU Load item where we have 99% usage.  So for this case my GTX 765M is being fully utilized.
If you also notice in both screens I have overclocked the GPU memory by 50% and achieved much better results but the GPU temperature is a very safe 56°C.  In laptops they of course stress battery life, they achieve this ultra conservative operation by severe performance reduction.

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