In a different forum, somedone didn't believe that there are BOINC-projects that can't be mapped to GPU-resources but fit with CPU-SIMD-instruction-sets. I've read about such different restrictions that result in this a longer time ago when I was active with some BOINC-projects (I've quitted BOINC because of the power-consumption).
So can you please enumerate some projects that use CPU-SIMD but that can't be mapped to GPU-SIMD?