I'm actually thinking of changing the algorithm. Any comments?
HEFTY1 (Heavycoin) is a good algorithm.
SB made a test of FPGA VS GPU ,get the result as follows:
1FPGA Scrypt =20pcs x R9 290
1FPGA MAX =120pcs xR9 290
1FPGA G =500pcs x R9 290
1FPGA x11 =300pcs x R9 290
1FPGA HEFTY1 =0.5pcs x R9 290