I'm guessing that, since you're here and posting for help, you've already read through the first post of this thread with the setup info, and FAQs, and stuff involving hubs and power draws and how to get the right version of everything and run cgminer with your pool account info? And looked at any other advice that might have been offered since you posted about this yesterday?

The first post should have a pretty comprehensive instructions for installing cgminer, and then the same startup string will work.

If you think there's a problem with the device, you should contact the seller you bought it from.

40GH is not an overclock for the NewPac, as the stock speed is 45GH. Are you sure you're using a NewPac?

If cgminer fails to start with the --gekko-newpac-freq flag, are you sure you're using the correct build?

When you say "does not start", what's the actual error message you're seeing?

By the way, I was doing a bit of reading on 2Pac stuff today due to some activity in that support thread. Going back over one guy's attempt to separate the 5V line on a 2Pac so he could run the buck power section off a higher voltage reminded me, on the NewPac all 5V devices (this means LDOs, the LEDs, USB chip, everything) pull 5V from downstream of the 2.2ohm buffer resistor near the buck chip.

Which means if you want to split the rails and drive the power section off a higher voltage or separate power source, all you need to do is lift that 2R2 resistor to isolate the two sides of the stick's 5V power systems.

Just, you know, just in case anyone needs that info. For doing something stupid. Also don't forget the inductor is only rated for 17A, which makes it the weak link in the buck.

I'm pretty sure the main regulator on these sticks will handle 500MHz at the chips (with minimal tweaking out-of-spec of voltage adjustment parts to up around 1.8V from factory max 1.6V), if other parts don't start melting first. You'd be pushing at least 15W into each chip, which probably cannot be done with air cooling.

If you bought a hub said to be made for these sticks, it's likely the one I'm talking about and it should treat you well.

Thanks for them links, VH. I was not aware of a 400MHz attempt.

Actually you can, because there's a chart in the first post.

The fastest I've ever seen someone push a 2Pac was about 350MHz. I've never pushed one past 300MHz (hence why the chart cuts off there; it's my data). VH can tell you where the code stops supporting speeds, but it's probably upward of 500MHz (technically possible maybe with liquid immersion). That's a decent setup you have there, pretty sweet repurposed cooler.

If you ever feel like upgrading to NewPacs, they'll mount up exactly the same as the 2Pacs (screws in the same place and everything), but NewPacs overclock like a breeze. You can typically push them to three times the stock hashrate without adjusting voltage. Your setup could see upwards of 300GH, especially with ASICBoost enabled.

I don't know how feasible it'd be for you, but GekkoScience also makes a USB hub good for 3A per port. You'd be able to power both sticks and your Pi off it, using a single 12V brick to power the hub instead of multiple 5V adapters and alligator clips.

The 606 may not be made with Bitfury chips, but I'm still planning on orange.

You are exactly right about the reason. We are GekkoScience, after all.

"next" -> "finally"
Hub stuff is a long-overdue project Novak and I came up with sometime in 2015. Wish I'd gotten around to it long before now, with all the wrangle people have gone through trying to line up good hubs for my sticks for the last few years.

Additionally, I know a lot of folks are low on stock but the next batch of NewPacs started manufacture today so they'll be available from your favorite sellers before too much longer.

A slightly more advanced version (there'll be different levels of features on different models) will have similar capability so it might not be too hard to put that in there as well.

The fan pin is coming straight off the 12V input. On the newer version of the hub (which isn't shipping yet) it's backed by a 2A fuse just in case, but there's no voltage regulation anywhere on the fan pin.

If it's an issue of plugging them in in sequence, try plugging them all in and then kicking on power.

First off - huh? Please fix your formatting if you have something to say.

Second - U10?

I didn't say anything about the brick. Talking about the hub itself. There's only three regulators, so if you want to push past 10W per stick you need to only put two sticks per regulator, which means a max of 6 on the hub for the really high per-stick speeds.

Best is six sticks with 2 to each regulator, but you can do 4 if you want.

You won't be able to go too much higher speed unless you can drop the voltage. Remember one 6A regulator shares to three ports, so if you use all three you're limited to 10W per stick instead of 15W.

That's incredibly vague and therefore useless. Have you tested the mystery work source with anything else to verify it's configured correctly?

Please tell me your command line doesn't literally say "localhost:port".

What's the work source you have running on localhost? Make sure that's set up correctly, which won't be in the hardware section.

Not the ones who were already too broke to buy in!

Also yeah, GMO bailing out is not a surprise at all.

I think he means KNC's first ASIC offering, not that KNC had the first ASIC. If I remember right, ASICMiner had the first ASIC and Avalon had the first publicly sold ASIC.

The point was, those hardwares were among the few built on pre-order money but without completely screwing over the customers.