The 'GMA HD' GPUs in the i3/i5/i7M are better than the GMA 950 (or even the GMA 3000 & 4500 series as far as I know), but they're still massively inferior to the nVidia Geforce 320M or its predecessor, the 9400M. There aren't any OpenCL drivers for the Intel GMAs as far as I know, although to be honest I can't see an obvious technical reason for that in the GMA 4500 and HD. Maybe there's no point as using the CPU in the same die is just as fast. Or maybe it's because Intel are rubbish at developing decent GPU drivers - their OpenGL implementations are pretty poor.