VarDiff, math and network load

[digicoin]

Hi all,

I am new to BTC mining. I see some pools that say they support VarDiff (50BTC, BitMiner ...) or list VarDiff as an important feature of their pools. However, I don't understand this concept as well as mathematical background of it.

As a newbie, how can I determine what user-defined difficulty is to suit my hardware capacity.

50BTC says that if I can process less than 1000MHs I should set user-defined diff to 2. However, they say nothing about what happens if I lower it down or raise it up in in term of my hashrate, share per minutes/days or network loads, energy consumption or the similar ...

Can anyone kindly explain it?

Thanks

[digicoin]

Anyone?

[8kmode]

AFAIK Less shares will be submitted the higher the difficulty, but the price per share is higher. Think it works out roughly the same but saves on bandwidth. If I am wrong I am sure someone will correct me though.

[digicoin]

Thanks.

Slower to submit shares can be translated to higher possibility to submit invalid shares. Is that correct?

[8kmode]

I wouldn't think so, but I am not 100%.

[evilscoop]

this might help a bit
https://bitcointalk.org/index.php?topic=112277.0

[digicoin]

Thanks. I just bumped my share difficulty to 4 from 2 and found 5 invalid shares per hour. Now I decreases it again to 2.