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I'm very new to Ethereum/cryptocurrencies, I'm trying to understand how to rate the efficiency/profitability of GPU cards

Question

If I exclude power bills / hardware aquisition costs, am I correct that hashrate is pretty much the only thing that matters to calculate profitability, and that it depends on:

  1. GPU Card
  2. Hash algorithm

Story behind

So I found this post, where OP is enquiring about hashrate of the GTX 1060.

One of the posts gave these hashrate numbers:

Lyra2REv2 ==> 22.5 MH/s
blake2s ==> 1180 MH/s
LBRY ==> 175 MH/s

The hashrate difference between algorithm is huge, is this normal?

I found many conflicting hashrate numbers all over the Internet, but most comments I've read are talking about 20 MH/s, which makes the blake2s 1180 MH/s rate so extreme that I'm wondering if I'm missing something...

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    You are right, you're missing something ;) you can't compare hashrates on different algorithms. All you have to know is hashrate of your card, hashrate of the network and difficulty. However, that's why I just comment and not answering, I can't tell the exact formula. You can look an another post about this calculation : ethereum.stackexchange.com/q/11380/405 Feb 4, 2017 at 18:48
  • @NicolasMassart: thanks, so basically the GPU card's hashrate is the same regardless of the algorithm, is that correct?
    – TheDude
    Feb 4, 2017 at 18:55
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    No, it's different for each algorithms. If you have 20Mh/s on ETH, it could be 1234Mh/s on another coin. That's why you have to use each coins algorithm formula to calculate profitability. Feb 4, 2017 at 18:58
  • 1
    the algorithm is always the same for one crypto. Try to find some article about crypto mining, that should help. Feb 4, 2017 at 19:06

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