Very strange.... I got it to work in a command prompt window running poclbm at the command line exactly ONCE today with Slush's pool.  Got 3 or 4 shares over several minutes.  Have tried both poclbm and Guiminer several times with both Slush's pool and BTC Guild with no success.  No shares accrued

In either case, the poclbm output reads:  8 MH/s (~0 MH/s) [Rejected: 0/0 (0.00%)]

Yeah, each machine has its own worker assigned, all pointed at  stratum.bitcoin.cz:3333

Just confusing that the 30 MH/s working was working fine until 3 days ago...  The two that aren't working probably have the same external IP, as they are part of a massive university network. GUIMiner shows them hashing, just not earning shares. How can it be that they connect to stratum but don't earn?

Hey all,

As the title suggests, I'm new to BTC and currently GPU mining until ASICs make it totally worthless.

I've got 3 total miners at 2 different locations working in Slush's pool.  2 of them were working fine as of a couple of days ago, but now only my main one is earning shares.

[1st IP]: ~250 MH/s, earning shares

[2nd IP]: ~30 MH/s, stopped earning shares; ~8 MH/s, never started earning shares.


I really wish I could get the miners at the 2nd site earning shares, as I'm losing out on about 10-15% earnings potential. Any advice welcome.

Happy mining!