Quote from: mchu168 on January 28, 2014, 04:52:43 PM

Quote from: Guava on January 28, 2014, 03:17:01 PM

Quote from: mchu168 on January 28, 2014, 03:13:15 PM

Quote from: mtnminer on January 28, 2014, 03:10:53 PM

If it is the factory power supplies like mine, they are getting weak on output. I reduce my frequency to 1300 and this seems to solve the problem. I am giving up a little speed, but gaining over all. I am about to order some new upgraded power supplies!

Mtnminer

Quote from: mchu168 on January 28, 2014, 01:03:05 PM

I've managed to get both of my units hashing at 200Gh/s+, however occasionally the hash rate will drop to 35-40Gh/s without warning with very high HW error rate. A reboot fixes the problem, but I'm forced to reboot the machines 2-3 times a day (and lose valuable mining time!). This happens on both miners.

Any thoughts?

Interesting - I've been running at 1500Mhz using 2 Corsair CX750s per box. If the hash rate drops keep occurring, I may try to take it down to 1400Mhz. Thanks!

What firmware are you using?
If the latest firmware doesnt solve it use crontab to restart cgminer automatically.

In System -> Schedule Tasks

Copy and paste to last line

0 */4 * * * /etc/init.d/cgminer restart
0 20 * * * /sbin/reboot

This will restart cgminer every 4hr and reboot miner every 20hr.

Awesome tip - I will definitely look at getting the latest firmware and possible setting up a scheduled reboot. Again, this forum rocks!

Also, I think I now know why some of my Avalon modules are hashing at half speed. In bridging the blown FUSE1's, I am almost certain that I probably fried/shorted/desoldered components on the adjacent modules. This is likely completely a result of my own ham-fisted soldering skills. Fortunately, I only messed up 3 of the 32 total modules between my two miners, so I'm still getting decent hash rate.

Just a warning to those dealing with blown FUSE1's - be very careful when you desolder and bridge those pads. Make sure you don't desolder or leave excess solder or flux around any of the microscopic resistors/etc on the adjacent PCB.

If I ever do something like this again, I will invest in a good magnifying glass...