From DXO's web site:
- OpenCl 1.2-capable graphic card with 1GB of video memory to handle OpenCL acceleration
- NVIDIA GTX™ 1060, AMD Radeon™ RX 580 or better recommended for DeepPRIME
My laptop only has a GTX 1050, DeepPRIME works, though there may be some penalties that I'm not aware of.
To me it seems that even ~10 year old graphic cards can manage the OpenCL acceleration. 1 GB+ is needed for minimum requirements for it.
1060 and up is recommended (not minimum) for DeepPRIME to get the load times Dxo thinks are meant for proper use.
Like I have said, I have Geforce 1050 Ti, 4 GB, and it just means mine works a bit slower.
Someone asked about Geforce 250, and it seems it has 2 GB. Of course GB's are not all that matters for a graphics card. Just like MP's are not for cameras.
This is just where I found what graphic cards have what OpenCL support:
"NVidia GPUs
NVidia supports OpenCL well on devices with Compute Capability 1.3 and up, which are the following:
- GeForce GTX 260 and up.
- GeForce GTX 400 series.
- GeForce GTX 500 series.
- Tesla C/S 1060 and up.
- Quadro FX 4800 and 5800
Older GPUs (with compute capability 1.0 to 1.2) won’t get really good speed-ups. It might be of interest when you have SLI. The GPUs not listed above from the following series have minimal support for OpenCL, but the list could have some mistakes due to generalisations:
- GeForce 100 series.
- GeForce 200 series.
- GeForce 8000 series.
- GeForce 9000 series.
- Tesla C/D/S 870.
- Quadro FX. Check this table if it mentions CUDA-cores."
https://streamhpc.com/blog/2011-12-29/opencl-hardware-support/