Avalon 741 low ouput

[Andy10]

I have an Avalon 741 and it is running at about 6 TH/s at present. It is supposed to be able to run at around 7.5 TH/s.

I was curious to know are there any settings in the controller I could tweak to get the output up a bit? I have been trying different voltage settings in the advanced options and it appears to run best on the -2 option (runs at about 6 TH/s on 02 and 2.5 TH/s for some reason on +1, I would have thought it would be the other way around), I was curious to know what the -2 options means and if there is an optimal setting(s) to get the unit to maximum output?

 

[the_electronrancher]

-2 is slowest.  No idea why it wigs out on +1, bad psu perhaps?

Try 0 or -1

[Andy10]

I've just switched it over to +1 again. I'm going to leave it a few hours and just make sure it's definitely going slow. Otherwise I will chuck it back down to 0.

I actually have a spare PSU here I can try if need be.

Would there be anything in the logging output that indicate the PSU was faulty that you know of?

[frodocooper]

From lightfoot's general troubleshooting thread:

Avalon has two types of miners still in use these days, the A6 series and the 721/741 series. Here are some thoughts:

• If the miner is running slow or not hashing at full speed, check the voltage at the power supplies. The 12 volt rail voltage is displayed in the interface, it should be around 12 volts. If it's 11.5, the miner will slow itself down to keep from burning the plugs. If it's 10.5 the miner will be a lot slower. Replace the supply or use two supplies (one per side).

...

Another item to check is fan direction: The fan should always blow air *out* of the miner (air comes from the fan). This is because pulling a fluid with a pump is always easier than trying to *push* the fluid. In this case the fluid is air, and trying to push it just creates pockets of turbulence that reduces cooling ability. So always make sure the fan is set to pull air through the miner and out the fan front.

[Steamtyme]

Can you provide more detailed information such as your PSU, what type circuit you are running on. How many Avalons are you running? What are your temperatures? How long have you let it run?

The more info the better including any error codes you might have in your API log, I'm not near mine but I believe they would be found by the heading ECHU, and ECMM

Also did you buy this new or used? Are you sure it's a 741 as the 721 model was a 6 TH/S miner