Why is it so low current effective hashrate?

lssbor

What does current effective hashrate depend on? Reported hashrate all the time 192.2 MH/s, effective hashrate is somewhere below:(
Valid shares 146, although usually 190

Xatos

Your valid shares are what determine your "effective" hashrate. You can hash away all day but it's all about shares found. Stale shares obviously cut into that.

Sometimes you'll get lucky and go above your actual rate, sometimes below. There's a little luck involved.