Mine works like a charm after upgrading to windows 10 pro....I did have to upgrade to the latest Nvidia drivers for my GTX 970 though..OpenCL is working fine...My CPU is an i3-4160 and I have 12mb ram...I'm going to post my Madvr and SVP settings soon, the latest tweaks I found to get the best optimum performance and quality!
I think it the GPU, maybe it's intel newest 10 drivers that I installed overriding the Surface's own drivers because I cannot stand the fluctuating brightness and the color restrictions. Anyway I will investigate some more before uninstalling SVP. Thanks Chainik