For the mount -> https://www.thingiverse.com/thing:4947599
And use any "print and send" service.



Do not buy the fans from Bitcoinmerch. They are really cheap and shit fans.
Out of the box 2 out of 6 didn't work well and were really noisy (high-pitched sound). And after some time the others failed.



Noctua makes 5V 40mm fans -> https://www.amazon.com/dp/B071W6JZV8/
I bought those with FAN to USB cables -> https://www.amazon.com/dp/B09BQ82B6F/
That lets me power the fan from USB.
Same result as your solution, but no need to buy a Step-Up cable.

It seems the miner only outputs 12v, with no control on the voltage.
You could use the Noctua NA-FC1 (link) to control a PWM fan.

I didn't play with the fan speed, because with the Noctua NF-A8 PWM, and at 525MHz, the heatsink is at 55°c; you can barely keep your finger on it. You need the fan at full blast to cool it properly.
You'll probably need to lower the frequency, to be able to lower the fan speed.

Yes, I confirm I bought the PWM model. The PWM part isn't important for the R909, but it is the 80mm Noctua model that has the most airflow.

You won't regret the fan change. Even less noise, and less vibration as the Noctua fans have anti-vibration pads on each corner.

To get more performance, you could turn the voltage knob clockwise, giving it more voltage. The hashrate should increase.
Here's pictures of the knob on mine (before/stock, and after) : https://imgur.com/a/F1V84qf

Didn't know Linux worked that way. My original post was updated.


You're welcome. I hope it can help a lot of other people also. It can be applied for those that use Compac F, replace "--gekko-r909-freq 525" by "--gekko-compacf-freq 525".
Also, I use "525" frequency in my setup, but I recommend starting with 400, and gradually going up. To see if there's a point where it overheats (I have an infrared thermometer) and/or gets a lot of hardware errors.


I barely turned it. It must have been 1/8. I took pictures before turning it. I'll post "before" and "after" pictures, but I don't have access to it now, to take an "after" picture.
I'll be using the Compac F's
Edit: Here are the before and after pictures https://imgur.com/a/F1V84qf

For the power supply, I'm using a +10 year old Corsair TX650 (650w, 80Plus Bronze). It won't be the most efficient power supply, because of it's age.
Also power supplies are the most efficient when you use 50% of their total rated output power. But hard to find (impossible?) a 200w 80Plus Platinum computer power supply. And I didn't want to buy a new one, to only save ~1$ per month of electricity.
It is kept on, with a "jump start" adapter, like these : https://i.imgur.com/ERai2HX.jpg
And I use the 6-pin PCIe connector on the R909. In theory that plug is rated for 75watts (link). But I don't worry about that. Just check it's well plugged in.

For the configuration and installation of the Raspberry Pi, I've got an old model, so I went with the command line OS, no fancy interface or desktop.
To "flash" the SD card, I used Raspberry Pi Imager (link), selected Raspberry Pi OS Lite, and in the advance options activated "Enable SSH" giving a username and password. I'm using a SSH connection to connect to the Raspberry Pi.

Once everything is copied, put the SD card in the Raspberry, and turn it on.
Connect the Raspberry to the network. You'll need it's IP address to connect to it. You can find it on the router, or with a program like Advance IP Scanner (link).
Once you found the IP address, you can connect to it with the program Putty (link).
It will ask for the username and password you entered earlier.

For the installation of CGMiner, I used Kano's website : https://kano.is/gekko.php
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install -y build-essential autoconf automake libtool pkg-config libcurl4-openssl-dev libudev-dev libusb-1.0-0-dev libncurses5-dev zlib1g-dev git
cd
git clone https://github.com/kanoi/cgminer.git
cd cgminer
CFLAGS="-O2 -march=native -fcommon" ./autogen.sh --enable-gekko --enable-icarus
make
sudo apt-get install -y openjdk-8-jre-headless

To run CGminer, and start mining, I go in the CGminer folder (cd CGMiner), and enter this command :
sudo ./cgminer -o mining pool -u btc address -p x --gekko-start-freq 400 --gekko-r909-freq 525
I saw somewhere that you should be able to enter that command without "sudo". But if I don't enter "sudo", it can't access the USB peripherals. I'm too lazy to find the fix.

I use "Screen" to be able to run multiple programs in the terminal (CGMiner and HTop) : https://raspi.tv/2012/using-screen-with-raspberry-pi-to-avoid-leaving-ssh-sessions-open
I use "HTop" to see the CPU and RAM usage : https://linuxhint.com/raspberry-pi-cpu-usage-monitoring/




I'm happy with it also. I ordered six Compac F, before the announcement of the R909. I ended up not using the Compac F, as the R909 is much easier to power, is compact, and needs only one fan to cool down (compared to the Compac F that needs one fan each, plus the USB Hub that has a fan also).




For my question what numbers should I look at for the "rejected shares" and "hardware errors", if I looked up correctly, these are the calculation to get the "rejected shares" and "hardware errors" percentage :

Number taken from my earlier screen capture. You need to take the values that are at the top
rejected shares percentage  =  R * 100 / (R+A+HW)  =  6944 * 100 / (6944+14955024+7616)  =  0.046%
hardware errors percentage  =  HW * 100 / (R+A+HW)  =  7616 * 100 / (6944+14955024+7616)  =  0.051%

If these calculation are correct, I think I have some headroom to lower the voltage, and watt usage. 2Th/s was my goal, I don't want to push it more.
On graphic cards, I'm happy when these values are bellow 1%.

Got my R909 unit yesterday.

It was equipped with an Artic F8 fan, that has a good airflow : 52.7 m³/h at 22.5 dB
Replaced by a Noctua NF-A8 PWM : 55.5 m³/h at 17.7 dB

Plugged it to a Raspberry Pi 3 Model B, Quad Core CPU 1.2 GHz, 1 GB, with Raspberry Pi OS Lite.
It's using around 38~40% of the CPU. Edit: The CPU percentage goes to 400% on my model. See Kano's explanation here (link).



I've turned the voltage knob clockwise, to add voltage.
It's running at around 2.061 Th/s for 99 watts at the plug (including power supply, Raspberry Pi and R909).
The heatsink of the mining chips are around 43°c.
I'm not used to be running CGMiner, what numbers should I look at for the "rejected shares" and "hardware errors" ?

"Red Fox Crypto" testing live on Youtube : https://www.youtube.com/watch?v=ykMhELRWh9U

https://www.nicehash.com/blog/post/100-lhr-unlock-at-nicehash-its-here


I can't test myself, as my rig doesn't run Windows and isn't physically near me.
I'm curious if it really works, and with which cards.

ETH 13.66 MH/s @ 57watts
Source : https://twitter.com/wxnod/status/1484529707148517379

Run with the coins and live a nice life.

$69,100

Reason : Numbers in relation to my mining warehouse address.

Newegg Insider lists AMD Radeon RX 6000 series specifications
Source : https://videocardz.com/newz/newegg-insider-lists-amd-radeon-rx-6000-series-specifications

Source : https://www.youtube.com/watch?v=MLXXVpaWkz4

Hashrate isn't really impressive
Ratio hashrate/price is almost the same as the AMD RX5700.

New announcement from AMD.
First post updated.

@300 watts

RX5700 can do 50 Mh/s at 100watts.

Edit :

Source : https://twitter.com/AMD/status/1303727083747766274




Original post :

Source : https://twitter.com/RedPandaMining/status/1301935848493993984