Quote from: Deezil on January 03, 2016, 07:09:45 PM

I received my 10 sticks (in addition to the two I already had) and got them setup on Minera using the cgminer-gekko custom version. I've been slowly increasing the clockrate/voltage but seem to be maxed out at 275 MHz with the voltage set at 700mV (drops to about 685mV when they are running). Even cranking the voltage up to 800mV I cannot get the hashrate higher than 275MHz without significant HW errors or complete stick failure (according to cg-miner). When I was only running two stick I had no issues running 433MHz at 800mV on the pot. I'm no hardware guy and I don't know crap about electricity, but my current setup includes 3 sets of 4 sticks, each set of four sticks are on a 12V / 3A powered USB 3.0 hub. They are all connected to my Sony VAIO laptop running ubuntu and Minera (that's all it does). I'm thinking at 12V / 3A I should have about 9watts available to each of the 4 sticks, which should be plenty, but I have no idea if that's correct or not. I can't seem to figure out how to calculate a basic formula for the consumption based on hashrate, or the other way to calculate maximum hashrate based on supply power. COoling is not an issue I have two 80mm fans on each set of four hashers and they are warm but not hot and have been running for days.

Also, I seem to have issues with COMPC 9, as you can see in the Screenshot link below. I get lots of HW errors. This stick is setup identically to the other 11 sticks but it is the only one that gives trouble, even when I switch it around to different ports/hubs it's always the troublemaker.

I also haven't considered limitations of cgminer (if any) in regards to running so many sticks on one instance of the program. Any help / pointers / suggestions would be greatly appreciated as I am new to all this and eager to learn.

this is easy get a fourth hub..

here is why 3 amps x 12 volts = 36 watts / 4 sticks = 9 watts no wrong..

the 12 volts converts to 5 volts inside the hubs 5% loss at best so 36 x .95 = 34.2 watts at best. but you are running 24/7/365 so de rate by 80 percent so 34.2 x .8 =

27.36 watts at the absolute best. divide by 4 = if you are lucky a max of 6.84 watts per stick.

now that is one issue.

second issue is 6.84 watts is 1.368 amps per port

the hub may exceed that with 2 sticks even 3 stick but not 4 sticks.

Try running 3 sticks on each hub and see how high they go.

lastly all my windows 7 ,8 ,10 said fuck you when I raised my sticks over 7. and my hubs are studs. my 19 port hubs can do 16 sticks at 300freq.

my 49 port hub can so 20 sticks at 300 freq.

I use linux and can run 20 sticks at 300 easy.

I am down to 13 sticks and run at 250.