Ninjastic
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Board Mining support
Re: [GUIDE] GridSeed GC3355 5 Chip Setup/power/windows/linux/rpi by UnicornHasher
by
pjcltd
on 09/04/2014, 00:53:06 UTC
Quote from: suchmoon on April 09, 2014, 12:34:46 AM
Quote from: Ranma13 on April 08, 2014, 11:23:28 PM
Quote from: pjcltd on April 06, 2014, 02:02:21 PM
Quote from: Ranma13 on April 06, 2014, 11:45:43 AM
Quote from: pjcltd on April 06, 2014, 11:39:06 AM

I think you will find the HUB dose not have enough power to run 24 gridseeds

what size is the PSU?


This is the Monoprice 24-port USB hub. I don't have it in front of me right now, but I think the power adapter for it is 12V at 4A = 48W. The Gridseeds are powered using 12V at 7A = 84W power bricks. Each one powers 8 Gridseeds each, and the Gridseeds run in scrypt only mode. I purchased the 20x Gridseed kit from Zoomhash, 4 of them.

i'm not sure but i dint think thats enough power on the 5v Line to power all the gridseeds.



I've tried 4 different USB hubs and it looks like the max number of Gridseeds I can get running at the same time is around 7-9. This is using the Raspberry Pi across 3 different distros (Hashra, Scripta, Zoomhash). The hubs were:

4-port USB hub - 5V @ 1 A adapter, all 4 Gridseeds working
10-port USB hub - 5V @ 1 A adapter, 8 Gridseeds working
10-port USB hub - 5V @ 2.5A adapter, 8 Gridseeds working in Scripta, 9 Gridseeds working in Hashra.
Monoprice 24-port USB hub - 5V @ 4A adapter, 7 Gridseeds working in Scripta.

So I don't think it's related to the power.

I've had 20 working for about a month on two 10-port hubs, each with a 5A adapter.

I also had 26 working for a few days on two 13-port hubs, which came with 2.5A (I think) adapters, but I used an ATX PSU to feed 5V to them, so not sure how many amps that was.

I couldn't get the Monoprice hub to work either, at most I think I got 18 Gridseeds on it.

I also found that USB cables matter too. Cheap thin cables wasted me a lot of time with random drop outs and freezes.

I had my first 20 grid seeds working on a 49 port hub
and on Monday i got 30 more in
now i can not put more that 25 grid seeds on the 49 port hub if i do then all the grid seeds stop mining.
i have changed the PSU with one that has a 25amp 5v rail but its still the same
now I'm looking for a different usb hub to use.

had anyone got any of the 10 port hubs that come in the grid seed accessory pac they are not using and want to sell ?