Re: DIY FPGA Mining rig for any algorithm with fast ROI

I doubt that FPGA performance/perwatt,same 28nm, FPGA can only get 5x lower power，14nm GPU is more efficient，so it can be 4x

The VU9P FPGA is a 16nm device, not 28nm.

Yes of course. I thought LTCMAXMYR compares 1080ti with 28 nm FPGA.

i have some parameters，2015 some FPGA miner mine MAXCOIN （as you see, my nick name have a MAX)
keccak 2 core ,@200MHz，may run 300Mhz,but Limited by chip specification and board 1.0V DC/DC power.
28nm kintex 325t, 400M, 25W , ~2.1A @12V, so 16M/W
same time GeForceGTX970 got 400M @125W , 3.2M/W

xilinx report 16nm 2x improvment
https://www.xilinx.com/products/technology/power.html
16nm XCVU9P may get 32M/W

16nm GTX1080ti ,1200M, 150W ，8M/W

that is about 4x

14nm GPU will be more efficient，so it can be lower than 4x

I dont understand.You says OP says 650MH on phi with 150W which is 4.3Mh/W
1080ti makes 30mh with 150W which is 0.2Mh/W which is x20 more efficient.

which is it x4 times more or x20 times more efficient?

it is keccak algo for maxcoin

so yours calculation x4 times more efficient than 1080ti is applicable only for keccak?