most algos had been made FPGA, even crytptonite ,HEFTY1 and prime-series
a single FPGA chip,
for x11,X13,prime,FPGA is much faster then any GPU,
for memory-hard styles,such as scrypt,crytptonite,it is the same speed,but only 1/10 power,
currently,the only algo that fpga cannot fight back is HEFTY1,FPGA expert proved,it is only 158K per chip,but 290x is 28M, 980 is 40M
edit: you are probably talking about cryptonote