Quote from: poonasor on Today at 01:26:13 AM

Quote from: nullama on April 13, 2022, 05:54:58 AM

Quote from: poonasor on April 13, 2022, 04:52:56 AM

so i can't seem to get the sticks over 450 mhz

I have a gekkoscience usb hub, with 2 ports splitting 6 amps connected with a 200watt FutureBit power supply

I've put 3 into the hub and connected it to an old RaspberryPi3 got CGminer running no problem but no matter what i do i can't get them over 450mhz - according to the chart on page 3 i can go much higher than this

Did you use kano's suggestions? Try with a lower gekko-start-freq to start with and see when it starts to fail.

Ideally connect a USB power meter to see if the power is actually being delivered correctly from the hub.

Also, are you using a good fan?, it could be overheating and failing because of that.

In any case, it's working as expected though, since they're only ensuring 400MHz:

Quote from: https://bitcointalk.org/index.php?topic=5355470.msg58205667#msg58205667

Just as a note, all sticks are tested for a minimum of 12 hours at 400MHz and must average at least 220GH (80% speed) during this test to be cleared for shipping.

In that post are other things you can try as well:

Quote from: https://bitcointalk.org/index.php?topic=5355470.msg58205667#msg58205667

--gekko-compacf-freq 400 --gekko-start-freq 300 --gekko-tune-up 85
which means it targets 400MHz, starts ramping from 300MHz (instead of the default 200), and will step up when the measured hashrate breaks 85% of expected (instead of the default ...90-95%?)
If it doesn't level out above 300-400MHz, that's when adjusting the volt screw could start to make a difference.

yeah thanks for this, I've already tried this - im thinking it may be my raspberrypi 3 but i am going to try to add more cooling

Hey everyone. I am new here (and to the hobby mining scene). After lots of research and pouring through this forum I have gotten myself mining (currently pointed solo via CK Pool). I have gotten stuck on changing the mhz on my miners.

I am running the latest raspbian with CG Miner 4.12 mining with the Gekko CompacF and Newpacs. I am using the bitcoin merch 10 port usb hubs and plan to begin testing out actual power output soon. I may be making a dumb mistake in the cmd line so excuse me if I am.

Code:

sudo ./cgminer -o stratum+tcp://solo.ckpool.org:3333 -u 35e8N33Tj2bZ3wVQNMNiL8uFu7K5185bcX -p x --gekko-compacf-freq 200 --gekko-newpac-freq 150

When I change the freq in the code the program still runs properly without error but the miners continue target the standard rates of 200 MHz and 150 MHz or the two miners. At the moment I would ike to be able to overclock for testing purposes to determine power consumption needs, as well as if my cooling fans are enough to manage the heat.

Thanks in advance. BTW I know these usb miners may not be anything fancy/profitable in the mining world but they are certainly really fun and produce some impressive hash rates for a USB. This has also turned into a little side project for me to learn CMD line basics.