Quote from: muto on February 12, 2014, 05:18:10 PM

Quote from: Dunkelheit667 on February 12, 2014, 08:48:07 AM

muto, do you know, how many A your 450W PSU can deliver on the 5V rail? With this mod, each U1 will draw at least 1A for 2.6 GHash/s as MansenP measured here.

This means your PSU should deliver at least 16A on the 5V rail, would personally feel comfortable with 20A.

40A @5V and 20A @ 12V (as far as I know the switch uses 12V), actually I saw that it is 550W PSU

Quote from: Dunkelheit667 on February 12, 2014, 08:48:07 AM

Would test again with 10 Antminer's plugged into the Hub and check if they are running stable or not. In case they do, plug in additional Ants one by one, to check the critical mass for your PSU.

Just a thought.

It is the same problem even with one or two Sticks.

With 40A, the PSU should be fine. As far as I know these 49 port hubs using the 5V rail, but I could be wrong. Wink

Having the same issue with one or two Ants might be a sign the current limitation is actually on the hub. Something like mentioned here. With other words, you will not be able to fix it without soldering (the hub).

You might try to get one of your Ants above 2.2 GHash/s on a single usb port on a PC / with a different powered hub, just to double check.