Will try sending an e-mail too but they are still taking 7+ days to respond
Last few days I have notice one single (running 808 FW) has been reporting much lower U (shares per minute) then the two other singles on the same firmware -- NOTE BFL2 - below.
cgminer version 2.5.0 - Started: [2012-07-08 09:47:51]
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(5s):6820.5 (avg):7213.5 Mh/s | Q:64532 A:60760 R:130 HW:0 E:94% U:98.9/m
TQ: 12 ST: 12 SS: 0 DW: 839 NB: 68 LW: 0 GF: 6 RF: 17
Connected to http://NOYB:8332 with LP as user XXXX
Block: 000008c59a807b37fe8bfba3dc140a52... Started: [20:00:12]
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[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0: 69.0C 2886RPM | 585.1/590.6Mh/s | A:5070 R:18 HW:0 U: 8.25/m I:11
GPU 1: 68.0C 2892RPM | 631.5/626.5Mh/s | A:5481 R:14 HW:0 U: 8.92/m I:11
GPU 2: 68.0C 2893RPM | 582.2/590.3Mh/s | A:4997 R:14 HW:0 U: 8.13/m I:11
GPU 3: 69.0C 2690RPM | 626.8/625.9Mh/s | A:5406 R:11 HW:0 U: 8.80/m I:11
BFL 0: 50.2C | 804.2/795.8Mh/s | A:6714 R:12 HW:0 U: 10.93/m
BFL 1: 52.0C | 804.2/795.2Mh/s | A:6865 R:17 HW:0 U: 11.17/m
BFL 2: 56.9C | 804.1/795.6Mh/s | A:6023 R:10 HW:0 U: 9.80/m
BFL 3: 51.6C | 796.7/787.6Mh/s | A:6759 R:13 HW:0 U: 11.00/m
BFL 4: 51.8C | 764.1/755.7Mh/s | A:6223 R:11 HW:0 U: 10.13/m
BFL 5: 52.5C | 857.4/850.2Mh/s | A:7222 R:10 HW:0 U: 11.75/m
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This was after almost 12 hours - so long enough to rule out short-term "luck".
I removed the single from this linux rig and ran the auto-tune on it on a windows rig. 832 was the selected FW (higher than what I had been running) but it might be a tad cooler in my office. When I started mining (tried BFGminer as well to ensure it wasn't a CGminer issue) the "nonce light" that is visible on the right side of the unit would occasionally turn off (not just blip at each new nonce). This seems to be completely random and will last from .5 to 12 seconds. This appears to be the equivalent of the device turning off - hence the lower U. The weird part is why the Hash Rate still shows fairly high.
I have since flashed to the lowest firmware (768) and it is still happening (nonce light turning off).
RMA is probably not worth it as I will lose more income in not miningg than I would gain from a properly functioning unit?!?
PS - While typing his message the light has turned off 5+ times...
PPS - BFL crew - any suggestions?!?
Dear JWU42,
Three things might be happening:
1) If occasionnaly the nonce-led (the ones that are inside the box, not the one LED that is exposed via a lense) starts blinking,
remains blinking for 15 seconds and then remains ON and the nonce LEDs start working again, then the unit is throttling.
This is unlikely however, since you've mentioned that you had the same situation with a 768 MH/s firmware; Unless the unit was
moved or is receiving hot-air from exhaust of other units/PSUs or for some other reason, the air around the intake is warm.
2) The pool is not providing job fast enough. If the front LED remains on, but the nonce leds inside the box remain off for like a
second or two from time to time, this means the unit remains idle some times (not receiving jobs fast enough).
This is usually a Pool/Network/Software issue. If you're running on Linux, then linux kernel or driver can have a role in it as well.
3) USB Hub issues. Please check the USB connection, and try connecting the unit directly to the computer to see if it changes.
Please let us know how it goes.
Regards,
BF Labs Inc.
