grIDSEED-BLADE mining rig problem

[port1991]

Grettings all,

I started a mining rig grid seed-blade, I got a total of 6 units but for some reason sometimes 2 or 3 of them does not work I mean, the MH/S shows "0". while the others works fine. and then when I disconnect all and then only connect those one that did not work, then they work fine.  what should I do?

i got all conectes to a multi high speed port where I can connect different usb. maybe I need another group of usb port? maybe code is wrong?

no I sea what happen , this is my mining code:

bfgminer.exe --scrypt -o stratum+tcp://stratum.nicehash.com:3333 -u 1LZQDFquKUppvkbjUaXFQcA7T9hfGn7K16 -p x -d gridseed -S gridseed:all --set-device gridseed:clock=850


Any ideas?

[hexafraction]

If you are using a shared USB hub or port, you will have power issues. The hub can only supply about 500mA. While the device does appear to be externally powered (I am not familiar with this model), it is possible that the USB communication circuitry might be getting power from the USB hub instead of the device power. Even if it is not drawing power, it might be requesting a high power profile from the USB circuitry (as a result of lazy programming), which subsequently shuts down the hub for safety, even though all of that power is not being used.

Especially when clock rises, instability may occur (with inadequate external power and high clock exacerbating the issue).

You may consider using separate hubs or ports, or at least using powered hubs. Also try decreasing the clock speed somewhat.

[port1991]

thanks very much for fast answer, I will make arranges to my rig.