This is a multi-part Bitcoin mining tutorial targeting people new to Bitcoin. I wrote this back in 2014, but the same principals apply. The difficulty now is much much higher.
Part 1: What is difficulty and how does it affect mining gear?
Bitcoin mining tutorial
Network Difficulty is just a representation of how many shares it would take on average to find a Bitcoin block. Currently, Network Difficulty is 40 Billion. Simply, that means you need to complete 40 Billion Difficulty 1 shares to find a block on average.
Think of it as scratching lottery tickets. If one out of every 1,000 tickets is a winner on average. The first ticket you scratch might be a winner, or the 2,000 ticket might be. This is referred to in Bitcoin as mining luck.
What is a Difficulty 1 share?
Referred to as Diff1, it was/is the baseline pool mining used to define work accepted.
- 71.58 MH completes one Diff1 share on average every 60 seconds
- What is 71.58 MH? = That was about a low end AMD Graphics card from 2012
How do I calculate what my miner will make instead of having to rely on a calculator?
Network Difficulty / Diff1 shares = minutes to complete a block.
- Network Difficulty= 1 million
- Your miner = original ASICMINER USB at 333 MH
- (333/71.58) = 4.652 Diff1 shares per minute
- (1,000,000/4.652)= 214,961 minutes or 149 days on average to find a block.
- Network Difficulty = 13.46 Billion
- Your miner = KNC Neptune at 3.3 TH
- (3.3*1,000,000) / 71.58 = 46,100 Diff1 shares per minute
- (13,460,000,000/46,100) = 291,973 minutes or 202.75 days on average to find a block
Diff1 is no longer actively used by pools, because it is not practical to log 46,100 shares per minute for one miner. The reference to Diff1 is still used by everyone, just as multiples.
The pool you mine reports back that you submitted a Diff 1000 share. You did not send back all the shares less than Diff 1000, but when you submitted a Diff 1000 share, you get credit for 1000 shares.
So instead of submitting 46,100 shares per minute you would be submitting (46,100/1000) = 46.1 shares per minute. You still get the same amount of credit, and your miner did the same amount of work as before. You are just filtering shares below Diff 1000
This is the end of Bitcoin mining tutorial Part 1, I hope it makes sense.
I wrote this so average new miner could read it, not so it could be an exact mathematical formula.