Over 100% efficiency

[cakey]

I’m new to all of this; I only took an interest in bitcoin four days ago and started mining the same day.  I Joined a pool though (bitcoinpool.com) and noticed that some members have above 100% effecincy one guy over 1,000%. I don’t completely understand all the mechanisms behind bitcoin, how is it possible to have such a high efficiency?  I am currently using Phoenix miner 1.7.5 and am averaging 730 Mhash (on my end) with about 82% efficiency.

[Lauda]

what do you mean by efficiency, energy spent per MH/s or?
He could have the new avalon asic device.

[cakey]

The pool i'm mining in describes it as...

"Efficiency. The percentage of getworks you've submitted answers for vs. the number of getworks you've requested. The higher the number, the more efficient you are. The lower the number, the worse your miner is. You can get a more efficient miner by downloading Phoenix Miner

Efficiency % = (Number of Submitted Shares) / (Number of Getworks Requested) * 100"

[AlphaWolf]

Because there is a "newish" protocol called "GetBlockTemplate" that allows miners to create new work without having to request it from the pool server constantly.  They are likely using GBT, and likely have very fast hardware (like ASIC).

Also, perhaps the pool allows requesting higher difficulty work... in which case each difficulty X share returned would be the equivalent of submitting X number of difficulty 1 shares.  By default, miners request difficulty 1 shares, so every share returned = 1 share.

[cakey]

if i wanted to increase my efficiency and i assume the number of shares i was acquiring how would i incorporate this GBT into my operation?

[🏰 TradeFortress 🏰]

You'd only really get a benefit if you had an Avalon ASIC.

[AlphaWolf]

Increasing your efficiency doesn't increase your number of shares.  It is just a measure of how much you're producing vs. how much overhead you're creating.  But if you want to increase your efficiency... use a miner that supports GBT, (like BFGminer, and some others), and point it at whichever port the pool has setup for GBT.

To increase the difficulty of your shares, BFGminer has a flag (I think it is --request-diff) that you can set to request higher difficulty work.  Be aware, that this can increase your variance, as you will no longer submit difficulty 1 shares... You will only submit difficulty "X" shares, but they will count as X number of difficulty 1 shares... I hope that makes sense.

[cakey]

Thank you for the info AlphaWolf.  I'm still shaky when it comes to flags, code and terminology but i'll look into it and give it a try.