Quote from: cbutters on May 01, 2014, 07:05:44 PM

Hey everyone, Just wanted to report back on my 10 miners from gaw,
2/10 did not work out of the box,

1 had clamped the fan wires and shorted everything out when I plugged it in. - Fixed this by repairing the fan wires
1 hashed, but nothing got accepted - fixed this by reflowing the solder with a heat gun... hashing like a champ now.

I modded 4 with the 49.9K resistor, and was running them averaged 1225mhz stable / average 507 khash and found the heat and power consumption excessive - 29ish watts when pods were hot.
I now have modded all to with a 47K resistor and total mhz average after tuning is 1190mhz / 501

47K vs 49.9K Comparison:

Hashrate Ave. Watts MHz (ave after chip tuning) hash /Watt
47K 501.65 20-22 1190 22.8
49.9K 507.6 28-29 1225 17.5

My definitive Thoughts
-Use a 47K resistor - the extra heat / power management is not worth the minimal hashrate increase.
-use sandor111's cpuminer
-No HW errors does not mean your miner is running optimally, some gridseeds will run slowly at clocks that are unstable, but not throw HW errors.
-use autotune for debugging and testing max frequencies of chips, but lock them in manually in your config script.

Right, but keep in mind:
not all miners are the same hence your comparisons do not apply in general to all.
And, the watt/heat is not excessive w/49.9k. At least not with my pods.
I wonder what Gridseed has changed since the first mods were done on these things?
We know their quality control leaves quite a bit to be desired.
I'll be glad when I don't have to do diddly with my miners anymore. Just buy them, mine them, make them pay off ROI and profit from then on! BIG TIME! Grin