By the way, there was mentioned Xilinx VU9P FPGA board with the link to Amazon where it is possible to buy this board at the cheapest price, and there was mentioned that this board comes with a pretty bad cooling, so for a good job in mining you need to manually perform the required settings and improvements. Frankly speaking, I didn't used this FPGA board, because I'm not a miner, but simply I prefer reading articles of these guys, because they have a lot of information about mining, crytocurrency news and the thing I like the most reading articles from that site is that the authors of articles explain difficult themes in simple words
you are correct, the standard stock Xilinx VCU1525 do not have the VRM and cooling capacity to compete with BCU1525s, which have been beefed up considerably.
thay CAN be used, however not with locked (unsure if thats the term) bitstreams, and with reduced workload compared to the BCU and its variants.
you used to be able to get refurbished BCU1525s at fpga.land for ~$2,000 USD but they are sold out at the moment.
https://shop.fpga.guide/collections/all/products/refurbished-bcu1525?variant=29239864623197EDIT i have a bcu1525