GPU "core" is equivalent to scalar component of SIMD units like SSE / AVX. You may have 4-8 of them for every hyperthread. So in x86 CPU with 8 core and 2 hype

GPU "core" is equivalent to scalar component of SIMD units like SSE / AVX. You may have 4-8 of them for every hyperthread. So in x86 CPU with 8 core and 2 hyperthreads you may have 8 x 2 x 4 = 64 equivalents of GPU cores. In OpenCL terms it's called a PE (Processing Element). Also what AMD calls a "GPU core" is something smaller, than what NVIDA calls "GPU core".