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I'm at about ~22GH/s per Xilinx VU9P UltraScale+ FPGA - at least 40GH/s is possible (for around 250W/device.)

The nonce alphabet being limited makes the whole thing quite a bit more expensive.

That's a beefy FPGA! Wish I had access to one to revive my 2009 era FPGA coursework knowledge but it seems the dev boards start at 5 figures which is too rich for a side project.

You can obtain them on capable boards on eBay for $600-1000 - https://www.ebay.com/itm/326181455270

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