Does mining power of different miners add up in mining pools? I have this doubt regarding bitcoin mining, assuming I have two miners of hashpower 500 H/s .


Can I add up my hashpower and make it work like a single processor of 1000H/s
OR
Both both miners would be acting independently?


According to what I have read, option 1 is how it takes place.


So this means a mining pool has combined power of all the associated miners and working on one block?
OR
All miner are working on different block of their own ??


According to what I have learnt, option 3 is how it takes place.

Now, referring to the attached chart by blockchain.info and assuming option 1 &amp; 3 for the questions
Only top 3-4 mining pools should be making profit. Relatively other miners have a very low probability with available hashpower to mine a block. And say for profit if all the miners decide to join big mining pools, eventually the network will become centralized.
Mining is a lottery, not a race.

The fastest miner doesn't always win. In general, if you have X% of the hashrate, you will find X% of the blocks.

This is because not just all pools, but every every, every chip, ... is attempting to solve a different block proposal. Every attempt has an independent chance of winning. There are an infinite number of potentially valid blocks, but they're still only a tiny fraction of all possible blocks. Everyone is not trying to find the next block - they're trying to find a next block.

So:


  
  Can I add up my hashpower and make it work like a single processor of 1000H/s
  


Yes. You can't distinguish the different processors - more hashpower just tries more block proposals at the same time.


  
  Both both miners would be acting independently?
  


Yes. Everything always acts independently.


  
  So this means a mining pool has combined power of all the associated miners and working on one block?
  


Yes.


  
  All miner are working on different block of their own ??
  


Yes.