https://bugs.winehq.org/show_bug.cgi?id=36031
--- Comment #2 from Henri Verbeet hverbeet@gmail.com --- That's essentially the same GPU, though probably clocked differently, etc. (See also http://nouveau.freedesktop.org/wiki/CodeNames/) Just to verify though, glxinfo does report that as "NV96", right?
I doubt the slight difference in the reported card is causing this issue though, it's more likely that the GL driver doesn't implement some feature that we need to implement some D3D feature, and WoW warns because of that. I.e., I think it's more likely that this is about the reported D3D device caps than about the name.
Common issues there are missing support for floating point textures or S3TC texture compression, although I can't say if that's the case in this specific instance. Does the application create any kind of log file with more detailed information about what it thinks is missing? If not, perhaps the first 1000 or so lines of a WINEDEBUG="+tid,+d3d" log could be helpful.