I have about 8 ASIC USB Block erupters which I ordered from BTC guild over time. I have a plugable USB powered 10-port Hub to which I've hooked up these 8 ASICs. I'm mining bitcoins from Slush's pool, but it shows that I only have a hash rate of 1370 MH/s instead of the expected 2640 MH/s.
The power ratings on my hub's adapter are as follows.
Input 200-240 V, 50/60 Hz 0.5 A
Output 5V, 2.5 A
I'm not sure if this will help, but these are the parameters I use with
BFG Miner.
-G -S all --icarus-options 115200:1:1 --icarus-timing 3.0=100
All devices' LEDs are blinking as they should and all 8 devices are recognized by BFGminer. All 8 devices show the hashrate they should, on BFG miner.
So, does the problem lie with my devices or the pool? Am I mining the right amount of bitcoins?