nvidia fermi doesn't support dforce

Padone

This is just for people who may be wondering why iray works fine but dforce doesn't.

If you have a fermi card then it's opencl 1.1 while dforce requires 1.2 so you need the cpu driver. While iray works fine with fermi at this stage until they'll pass to iray 2017.1.x. I feel to post this info because this is not mentioned in the 4.10 discussion. Hope this helps.

davegv

 Per NVIDIA:  ( Current Drivers Do Support 1.2 ) 

NVIDIA makes no statements about "not supporting" OpenCL, nor any forward-looking statements about what will be supported in the future. We support OpenCL, and currently our support is at the OpenCL 1.2 level.

NVIDIA was the first to have a workable system based on OpenCL 1.0, and I believe we may have been the first to offer OpenCL 1.1 support. Eventually OpenCL 1.2 was supported. These milestones have all been driven by business priorities.

Padone

davegv said:

 Per NVIDIA:  ( Current Drivers Do Support 1.2 ) 

Unfortunately not. They do support 1.2 only for Kepler and above. Fermi stills 1.1. So it is supported by iray but not by dforce. You can find technical details on the nvidia page. And also on the wikipedia page. And I can test and confirm it because I have a fermi card on my laptop.

From the 388.59 release notes http://www.nvidia.it/Download/index.aspx:

This release supports the following APIs:
 Open Computing Language (OpenCL TM software) 1.2 for NVIDIA ® Kepler TM , Maxwell TM , and Pascal TM GPUs
 OpenGL ® 4.6
 Vulkan ® 1.0
 DirectX 11
 DirectX 12 (Windows 10)

From the wikipedia page https://en.wikipedia.org/wiki/OpenCL:

April 13, 2015: Nvidia releases WHQL driver v350.12, which includes OpenCL 1.2 support for GPUs based on Kepler or later architectures.[98] Driver 340+ support OpenCL 1.1 for Tesla and Fermi.