With OpenCL + FPGA what you do is basically instantiate a GPU architecture inside an FPGA and then execute the OpenCL algorithm into that. I think that's cool

With OpenCL + FPGA what you do is basically instantiate a GPU architecture inside an FPGA and then execute the OpenCL algorithm into that. I think that's cool but you aren't getting a better throughput than what you would get with a GPU. The better solution would be to do your custom optimised control/data path for the FPGA architecture you are currently using (VHDL/Verilog).