Quote from: ylpkm2 on March 06, 2018, 05:18:48 AM

So 2.50 a day profit or so, almost no power draw for $500 bucks.. at a ROI of more than 6 months, I would pass. At least I can reuse and sell gpus easily. A fpga that can lose its value quick due to competition would be a poor choice. Someone will use a cheaper board and make a faster one. I know a few programmers here that have made fpga miners. They could potentially make a better version pretty easily. Maybe if price was lower I would go for it..

thank you for your valuable inputs. I am a GPU miner myself and it would also be my no.1 concern of no resale value when buying those dedicated fpga/asic miners.
so what would make you buy a fpga miner? you mentioned the price, currently there are two designs in my mind but i don't know which one customers would prefer:

1. a "big" fpga board with 2 or 4 cores on it, the hash power can beat a graphic card, with only a quarter of its power consumption. priced around $400-$800 (depending on the number of cores), most efficient hash/power and better hash/cost perhaps.
2. a "tiny" fpga mining usb stick. It would look a usb flash drive with heatsink on it (as showed in the link below). it has only one fpga core on it, maybe only a quarter of the GPU miner hash power, but power consumption is tiny as well, as it is powered solely from the USB. priced around $100 (i haven't run through all the numbers yet, just rough one). potentially you can connect multiple of those sticks on a usb hub with good power source. you can also take it with you and plug in your laptop and mine anywhere you want! this would be less efficient in hash/power and hash/cost if you compare to the big one though.
https://www.amazon.com/GekkoScience-2-Pac-Compac-Bitcoin-BM1384x2/dp/B06XBWK2W5/

I agree with you there are so many talented fpga/asic programmers here, but the design, manufacture and validation cycles may cost time and money. during which time we can constantly improve our design to make it more competitive.