06-29-2019, 05:58 AM
The Tesla K40 is an abysmally slow card by today's standards, especially in hashcat, and coming in at 235W TDP per card, you would be FAR better served getting basically any GPU from the current generation than trying to run those cards. Even the 149$ MSRP GTX 1650 will come in at something like 3 or 4x faster than a K40 and only consume 75W. Wont even need supplemental power for it. If that's out of budget, pretty much anything from the 900 Series and beyond will still be a better choice, simply because the architecture includes instructions that give a crucial boost in speed over the Kepler(700) series cards and previous.