Have you tried the may 13th version of cgminer yet? Im asking again as I find it strange that it will hash with all the chips and drop the frequency slowly. Its very similar to the issue I had with the newpacs on my win10 pc. They would reduce hashrate no matter what I set it at and also keep resetting. Its a quirk with my machine which i never figured out but the testing I did for vh helped alleviate the problem in subsequent versions of his build. The best of which for me is the May 13th. Its worth a shot considering everything else you have tried. Have you got any other usb peripherals running at the same time?

Yes. You need to donit for all newpacs/606’s you have connected.

Since there have been at least one  other dud you may as well return it and wait for a replacement.

I had not realized one other was returned. It is likely enough yours is the second dud.

I cant wait either - even though I have to return my R606 - I was happy with how it performed when it was working so I can imagine that anything new coming will be just as good or better.

we have a handful available for immediate shipping but large scale orders are still in production.

First off,


Even as the manufacturer, I have no idea what this means.

Second, Windows 10 sucks. Don't use it. I mean not just for mining, but like for anything. Ever. In addition to just being terrible in general, it also does some weird stuff to USB packets that has caused issues with R606 hashrate and stability. Might be bumping into some of the same issues.

Third, have you adjusted voltages at all? I'm assuming you have at least on the 2Pacs in order to get the hashrate you have, since that's way above stock speed. NewPacs with top-shelf chips can run 600MHz at stock voltage but I only guarantee stock speed on every stick; getting more than that will require tuning. It's also entirely possible one stick is inferior. The chips we get are kind of a grab-bag for quality.

Sidehack nailed it.   If you are using a Windows Machine I would highly suggest switching it over to a Linux based machine or SBC (Raspberry Pi 4 as example of SBC).    I have 3 Raspberry Pi's in total lol, 2 are 4's and the 3rd one is a 3 b+.  I use the 3 b+ as a pihole server.  The 2nd Pi runs my mining hardware.  And the 3rd one I use as my everyday machine.   2 watts of power draw on normal operations (web surfing, email, videos etc) and 5 watts whenever it hits full load.  No complaints.   I use my windows machine mainly later at night if I am in a gaming mood.  As yup that one is a windows 10 machine with a Ryzen 2600, 32gb Trident rbg memory, multiple ssd/m.2hdd drives for storage and a MSI RTX 2080 gpu for 1440p gaming entertainment.   I have gotten where I use this machine less and less.

Anyway, onto the miners:

On my Raspberry Pi 4 I have 4x Newpacs and 2x Futurebit Moonlanders 2.   All 4 newpacs are clocked at 450Mhz.  The average on them are as follows:

1: 100.7 Gh/s
2: 102.0 Gh/s
3: 102.1 Gh/s
4: 102.2 Gh/s

However their 5 second hash rates range anywhere from 90.5Gh/s to 105 Gh/s.  I have the Gekko hub powered by a HP Server PSU since I'm also running 2x R606's off it.  The moonlanders I have those clocked at 700 Mhs and getting 3.98 Mh/s each.  So the power draw being used up on this gekko hub would be the same as 6 newpacs.   I have 2 Artic Breeze fans (one is the bendable usb fan and the other is usb driven as well but stationary as it has a base) on the newpacs and moonlanders.  Both USB fans are plugged into a 4 port additional USB hub that is in turn taking up the 7th port on the gekko hub    No power issues at all.  And plenty of air flow on my miners.  The room average temp in the day is typically 78 Degrees F.   And 68 - 72 Degrees F at night.  I live in mountain areas and often have a window up and desk top fans (and ceiling fans) running all day.  Don't need AC much with current temps.

If you just want to test and see.  Take at least a 16gb USB stick and load Linux on it and boot off the usb drive.  I did this for a while with Ubuntu on a GPU mining rig.  No hard drives or SSD.  Just a 32gb usb 3.1 stick as a drive     You can try that and see if you notice a difference.  And by then, you may like Linux well enough to remain on it.  I had to use 2 usb sticks to get this to work though.  I put the bootable flash on a 8gb usb stick.  And once I booted my machine up with that, I had it format and install the Linux OS over to my 32gb usb stick.  Then next time I rebooted, I had only the 32gb stick in and ran my os off that.

** Edit **
Also, if you are using only 1 fan on that hub then you possibly are not getting enough airflow on them and could also be a factor at hitting roughly 90% of your mark.  I have two of them blowing on my mining sticks from different angles to make sure all of them have proper amount of air.   I'd suggest getting another fan to add to that mix and possible one that is corded so that you can move it around for a better angle.

Yeah, I tweaked the voltages on the 2Pacs, but not the new. I guess I assumed there were different generations of NewPacs, since the chips are different colors. Evidently I was wrong. I'll swap over to a Pi4 then and see what results that yields.


Ah, that makes sense. I've seen the plateaus, yeah. And I've got them quite cool, don't have a temp laser but they're only slightly warm to the touch, average coffee is warmer.


I've got 2 fans on them, I'm confident it isn't a heat issue - one fan is top down, the other is angled in from the side. I love loading the OS off a flash drive, I'll give that a shot before I buy a pi

Thanks everyone.

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Update: after getting cgminer running for a full 24h on my Pi @ 400MHz for my NewPacs, one is doing 88.4GH/s (normal), the other two are 80 and 77.

I’m using Win7 so would the ‘cgminer -n’ command be used in the command line such as the following:


This has been my main issue and knowing how to create separate instances isolating devices.