[GUIDE] BitFury Miner Support/Tuning

[GH]

Can you guess the noncerate of the card within +-1GH/s ?

38 GH .. ?

right on

Nice! But still inside the specs of the DC/DC Converter? Hard to belive for me, assumed that cooling alone does not produce more nonces 

[darkfriend77]

yep ... you might post ... your modifications ... ^^

[darkfriend77]

added ...

6. Bad & Dead Chips

You might have dead chips (marked as A) on your board that want go anywhere else then 0, ... and autotune ("a") will even be turn of on them and you might have bad chips which autotune will probably tune down to 0 clockspeed, but still autotune ("A") will be turned on (marked as B).



For dead chips there is no solution from software side that I know off. There might be some Hardware possibilities ... I don't know.

For bad chips there is!

First you need to turn of autotune "A" to "a" so that they wont be turned down to 0, because right know as long as they produce to many errors, they will be turned down until 0.

To start of set there clockspeed to 55 on the bad chip and let him run for 10-15 min. Check again. If he is performing better or not ... find a good rate between good and error. You might go down to 54 or 53 ... just check again, where the bad chip is performing at his max. potential ... at the end it might look like this one ...

* a bad one but still more then a stick

It might even be that bad chips get again running fine after running for hours (>24h) ... some users mentioned that bitfury chips have an integrated selfhealing mechanisme ... :-)

plz ... feel free to correct me or give some suggestions ...

[Aajo]

plz ... feel free to correct me or give some suggestions ...

I dont think you are talking about a real bad chip here, look at my chip 9 for example it only does errors ever, no point in turning it on at all.

Code:

1       aIfDSo  52      1.346   1.289   94      0       0       0       122     [8:0]   0       6 6 6 6 6 6 6 6 6 6 5 5 6 6 6 6         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2       aIfDSo  52      1.160   1.311   81      2       0       0       124     [8:1]   36      5 6 6 5 5 4 5 5 5 5 5 5 5 5 5 5         0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0
3       aIfDSo  52      1.274   1.321   89      3       0       0       125     [8:2]   0       6 6 5 5 6 6 6 6 5 6 6 6 5 5 5 5         0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0
4       aIfDSo  52      1.374   1.216   96      0       0       0       115     [8:3]   0       6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
5       aIfDSo  52      1.160   1.004   81      0       0       0       95      [8:4]   15      5 5 5 5 5 6 5 5 5 5 5 5 5 5 5 5         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
6       aIfDSo  52      1.174   1.374   82      0       0       2       130     [8:5]   36      5 6 6 5 5 5 5 5 5 5 5 5 5 5 5 5         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
7       aIfDSo  52      1.346   1.332   94      1       1       0       126     [8:6]   0       6 6 5 6 6 6 6 6 6 6 6 6 6 6 5 6         0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
8       aIfDSo  52      1.503   1.300   105     3       0       0       123     [8:7]   1       6 5 6 7 7 7 7 7 7 7 7 7 6 6 7 6         0 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0
9       aIfDSo  0       0.000   0.285   0       2208    0       6       27      [8:8]   756     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 315 316 316 0 316 315 0 0 0 0 0 0 0 315 315
10      aIfDSo  52      1.389   1.226   97      4       0       4       116     [8:9]   10      6 6 6 6 5 5 5 6 5 7 7 7 6 7 7 6         0 0 0 0 1 2 1 0 0 0 0 0 0 0 0 0
11      aIfDSo  0       0.000   0.888   0       85      0       7       84      [8:A]   495     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         5 5 5 5 5 6 6 6 6 6 5 5 5 5 5 5
12      aIfDSo  52      0.000   1.247   0       92      0       4       118     [8:B]   23      0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         6 6 6 6 5 6 7 6 5 4 6 6 6 6 5 6
13      aIfDSo  52      0.000   1.237   0       75      0       1       117     [8:C]   147     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         4 4 5 5 5 5 5 5 5 5 4 4 5 5 4 5
14      aIfDSo  52      0.000   1.226   0       0       0       0       116     [8:D]   13      0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
15      aIfDSo  52      1.088   1.332   76      5       0       2       126     [8:E]   0       4 5 4 5 6 3 5 5 6 6 6 5 5 4 4 3         1 0 1 0 0 1 1 0 0 0 0 0 0 1 0 0
16      aIfDSo  52      0.129   0.285   9       1       0       7       27      [8:F]   53      0 0 1 1 0 0 1 1 1 1 1 1 1 0 0 0         0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
17      aIfDSo  52      0.000   0.190   0       0       0       0       18      [C:0]   194     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
18      aIfDSo  52      1.303   1.374   91      1       0       0       130     [C:1]   0       4 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5         1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
19      aIfDSo  52      1.016   1.279   71      1       0       0       121     [C:2]   0       4 4 5 5 5 4 5 5 5 5 4 4 4 4 4 4         0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
20      aIfDSo  52      1.589   1.342   111     0       0       0       127     [C:3]   0       7 7 7 7 6 7 7 7 7 7 7 7 7 7 7 7         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
21      aIfDSo  52      0.873   1.321   61      0       0       0       125     [C:4]   0       4 4 4 4 4 4 4 4 4 4 4 4 4 3 3 3         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
22      aIfDSo  52      0.000   1.205   0       88      0       24      114     [C:5]   15      0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         6 5 6 6 5 6 6 5 5 6 6 5 5 5 5 6
23      aIfDSo  0       0.000   0.000   0       0       0       0       0       [C:6]   573     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
24      aIfDSo  52      0.000   0.000   0       0       0       0       0       [C:7]   294     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
25      aIfDSo  52      0.000   0.000   0       0       0       0       0       [C:8]   216     0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
26      aIfDSo  52      0.000   0.000   0       0       0       0       0       [C:9]   49      0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
27      aIfDSo  0       0.029   0.095   2       8       0       0       9       [C:A]   665     0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0         0 0 0 0 0 1 1 1 1 1 1 0 1 0 1 0
28      aIfDSo  52      1.374   1.279   96      2       0       0       121     [C:B]   10      5 7 6 5 4 6 6 7 7 7 6 6 5 7 6 6         0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0
29      aIfDSo  52      0.601   1.247   42      0       0       0       118     [C:C]   4       3 2 2 2 3 2 3 3 3 3 3 3 3 2 2 3         0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
30      aIfDSo  52      1.260   1.226   88      6       0       0       116     [C:D]   2       5 5 5 5 5 5 6 6 6 6 5 6 6 6 6 5         1 2 0 0 1 0 0 0 0 0 1 0 0 0 0 1
31      aIfDSo  52      0.959   1.184   67      2       0       1       112     [C:E]   1       5 4 4 5 4 4 4 4 3 4 4 4 5 4 4 5         0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0
32      aIfDSo  52      1.102   1.300   77      4       0       0       123     [C:F]   0       4 5 5 6 5 4 4 4 6 6 6 6 4 4 3 5         0 1 1 0 0 1 0 1 0 0 0 0 0 0 0 0
speed:1456 noncerate[GH/s]:23.050 (0.720/chip) hashrate[GH/s]:30.916 good:1610 errors:2591 spi-errors:1 miso-errors:58 jobs:376 (record[GH/s]:28.862)
8:      728     12.942  17.873  904     2479    1       33
C:      728     10.107  13.043  706     112     0       25

after chip #9 every coming chips go bad too, so I think I have to use the soldering jumpers - but I dont know how. Also it seems someone already used the soldering jumper on my chip #9 (if it is nr. 9). Can someone advice me here?

[-Redacted-]

That is chip 2, and that jumper should not be closed.  This could be the problem with your board. The chips are numbered U40, U41, ..., so chip 9 would be U48.

[Aajo]

That is chip 2, and the jumper should not be closed.  This could be the problem with your board. The chips are numbered U40, U41, ..., so chip 9 would be U48.

thank you!

*edit*
removing the solder from SJ50 helped alot, miso-errors on other chips are gone and hashrate doubled 

[cet]

What's the solution when you see lots of MISO errors?

by lots I mean:

Code:

Last login: Sat Sep 14 17:51:00 2013 from 192.168.1.2
{ "stats":
 {"speed": 880, "noncerate": 21.589, "noncerateperchip":1.349, "hashrate":28.678
, "good":568, "errors":138, "spi-errors":0, "miso-errors":126, "jobs":140, "record":0.000
,"boards": [
{ "slot": "0", "speed": 880, "noncerate":21.589, "hashrate": 28.678, "good": 568
, "errors": 138, "spi-errors": 0, "miso-errors":[b]126[/b] }
]
  } }

/cet

[dani]

Can you guess the noncerate of the card within +-1GH/s ?

38 GH .. ?

right on
https://i.imgur.com/AyQsg77.png

now how did you manage that? Crazy. Due to better cooling or mostly due to massive overclocking, pencil mod it down to .. 1k? 1,05k? Of course fine tuning in the end.. but.. 38? damn!

[goxed]

Here's How I did it:

a) Buy Copper VGA RAM Heatsinks. Usually ships in sets of 8, so 2 packs per h-board.

a.1) I bought these:  http://www.ebay.com/itm/161102078777?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

b) Affix each piece of VGA RAM Heatsink to the back of each BitFury chip on the H-Board. The RAM heatsinks come with thermal adhesives affixed.

c) Cut a 2 inch strip of DDR3 / DDR2 RAM heatskink for cooling the regulator area. Affix the heatsink to the back of board near the regulator with either thermally conductive glue or use some kind of thermal paste and small dabs of superglue / epoxy at the edges

d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.

e) Cool the boards with 120mm or bigger cooling fans.

f) Play around with best.cnf (I first changed of all the chip speeds to 54, and measured nonce rate after 10mins of hashing, then changed to 55 and again measured nonce rates. Compared the differences on a excel spreadsheet, and chose 54 or 55 depending on which produced higher hash rates for the chip.)

g) I Use only one pool for mining

h) renice the miner proxy process to -14 or lower

Code:

 2100 root        6 -14 33196 18864  4064 R 81.0  3.8 36h27:30 python ./mining_proxy.py -o us3.eclipsemc.com -p 3333 -cu XXXXXXXXXXX -cp XXXX -gp 8332 -v

h.1) I use htop to do it
h.1.1) sudo apt-get install htop
h.1.2) pi@bitfury / $ sudo htop
h.1.3) Press F7 repeatedly to reduce nice.
        

[goxed]

For your reference

Code:

1	aIfDSo	55	2.119	2.642	148	30	0	0	250	[0:0]	42	11 10 10 8 9 8 10 8 11 10 8 7 10 9 10 9 	0 1 1 3 2 3 1 3 0 1 3 4 1 2 2 3 
2	aIfDSo	55	2.663	2.526	186	5	0	0	239	[0:1]	1	11 12 8 12 12 12 12 12 11 12 12 12 12 12 12 12 	1 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 
3	aIfDSo	55	2.534	2.484	177	3	0	0	235	[0:2]	0	11 11 12 12 12 12 11 11 11 11 11 10 11 9 11 11 	0 0 0 0 0 0 0 0 0 0 0 1 0 2 0 0 
4	aIfDSo	55	2.749	2.664	192	26	0	0	252	[0:3]	21	9 11 12 10 12 10 13 12 14 14 11 13 12 12 13 14 	4 2 1 3 1 3 1 2 0 0 3 1 2 2 1 0 
5	aIfDSo	55	2.548	2.600	178	25	0	0	246	[0:4]	42	12 8 12 12 9 13 11 11 10 11 11 11 11 11 13 12 	1 5 1 1 4 0 1 1 2 1 1 2 2 2 0 1 
6	aIfDSo	55	2.305	2.547	161	14	0	0	241	[0:5]	21	10 11 6 9 11 11 10 9 10 10 11 10 11 11 11 10 	1 0 5 2 0 0 1 1 1 1 0 1 0 0 0 1 
7	aIfDSo	55	2.047	2.547	143	15	0	0	241	[0:6]	56	9 9 6 10 9 9 8 10 10 10 8 8 9 9 9 10 	1 0 3 0 1 1 2 0 0 0 2 2 1 1 1 0 
8	aIfDSo	54	2.262	2.505	158	6	0	0	237	[0:7]	0	10 9 10 10 10 10 10 10 9 10 11 11 9 10 10 9 	0 1 0 0 0 0 0 0 1 1 0 0 2 0 0 1 
9	aIfDSo	55	2.362	2.685	165	24	0	0	254	[0:8]	21	12 9 11 10 11 9 11 9 11 12 9 10 11 11 9 10 	0 3 1 1 0 2 1 3 1 0 3 2 1 1 3 2 
10	aIfDSo	55	2.620	2.558	183	13	0	0	242	[0:9]	0	12 11 12 12 11 11 13 11 12 9 11 12 11 12 11 12 	0 1 0 0 2 2 0 1 0 3 1 0 1 0 2 0 
11	aIfDSo	55	2.248	2.600	157	10	0	0	246	[0:A]	42	9 8 10 9 10 10 10 9 9 11 11 10 11 10 11 9 	1 2 0 1 0 0 0 1 2 0 0 1 0 1 0 1 
12	aIfDSo	55	2.763	2.653	193	21	0	0	251	[0:B]	21	12 12 12 13 12 13 14 11 11 14 12 12 11 12 13 9 	1 1 1 0 1 1 0 3 3 0 2 1 2 1 0 4 
13	aIfDSo	55	2.749	2.568	192	8	0	0	243	[0:C]	0	13 13 12 11 12 11 12 12 11 11 12 12 13 13 12 12 	0 0 1 2 0 1 0 0 1 1 0 0 0 0 1 1 
14	AIfDSo	55	1.489	2.568	104	73	0	0	243	[0:D]	288	7 5 7 6 5 8 8 8 5 7 7 7 4 6 8 6 	4 6 4 5 6 3 3 4 6 4 4 4 7 5 3 5 
15	aIfDSo	55	2.305	2.463	161	4	0	0	233	[0:E]	0	10 9 11 11 10 10 10 10 10 9 10 10 10 10 10 11 	1 2 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
16	aIfDSo	55	2.334	2.748	163	30	0	0	260	[0:F]	63	13 10 8 11 11 8 11 10 8 8 12 11 10 11 10 11 	0 2 4 1 1 4 1 2 4 4 0 1 2 1 2 1 
17	aIfDSo	55	2.692	2.537	188	4	0	0	240	[1:0]	0	12 12 12 12 11 11 11 11 12 12 12 12 12 12 12 12 	0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 
18	aIfDSo	55	2.405	2.484	168	19	0	0	235	[1:1]	59	11 10 7 11 10 10 11 10 10 11 10 11 11 12 12 11 	0 1 4 0 1 2 1 2 2 1 2 1 1 0 0 1 
19	aIfDSo	55	2.004	2.241	140	6	0	0	212	[1:2]	36	9 9 9 8 8 8 8 8 8 9 9 9 9 10 10 9 	0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 
20	aIfDSo	55	2.147	2.410	150	2	0	0	228	[1:3]	36	9 9 9 8 9 9 10 10 10 10 9 10 10 10 9 9 	0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 
21	aIfDSo	55	2.305	2.473	161	11	0	0	234	[1:4]	0	9 11 10 10 10 9 10 10 9 11 10 11 11 9 10 11 	2 0 1 1 0 1 0 0 2 0 1 0 0 2 1 0 
22	aIfDSo	55	2.090	2.516	146	20	0	0	238	[1:5]	54	8 8 7 10 8 10 8 8 11 10 11 10 11 8 10 8 	2 2 3 0 2 0 2 2 0 1 0 1 0 3 0 2 
23	aIfDSo	55	2.334	2.621	163	9	0	0	248	[1:6]	0	10 8 11 9 11 11 10 10 10 10 11 11 9 11 10 11 	1 3 0 2 0 0 0 0 0 0 0 0 2 0 1 0 
24	aIfDSo	55	2.147	2.346	150	8	0	0	222	[1:7]	37	10 10 10 10 10 8 8 9 9 9 9 10 10 9 10 9 	0 0 0 0 0 2 2 1 0 0 1 0 0 1 0 1 
25	aIfDSo	55	2.577	2.368	180	5	0	0	224	[1:8]	0	10 11 11 11 12 12 12 12 12 12 11 11 11 11 11 10 	1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 
26	aIfDSo	55	2.305	2.346	161	2	0	0	222	[1:9]	0	10 10 10 10 10 11 10 11 10 10 9 10 10 10 10 10 	0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 
27	aIfDSo	55	2.076	2.368	145	10	0	0	224	[1:A]	0	10 8 9 9 9 9 9 8 9 9 8 9 10 9 10 10 	0 1 0 0 0 0 1 2 1 1 2 1 0 1 0 0 
28	aIfDSo	55	1.961	2.336	137	5	0	0	221	[1:B]	0	9 9 7 8 9 9 9 8 9 9 9 9 8 8 8 9 	0 0 2 1 0 0 0 1 0 0 0 0 0 0 1 0 
29	aIfDSo	55	2.248	2.399	157	11	0	0	227	[1:C]	41	10 8 9 9 9 10 11 10 11 11 11 11 10 8 9 10 	0 2 1 1 1 1 0 1 0 0 0 0 1 2 1 0 
30	aIfDSo	55	2.477	2.505	173	18	0	0	237	[1:D]	12	10 11 9 11 12 11 10 10 11 11 12 11 12 11 12 9 	2 1 3 1 0 1 2 2 1 1 0 1 0 1 0 2 
31	aIfDSo	55	2.505	2.674	175	5	0	0	253	[1:E]	0	11 10 11 11 11 11 9 10 12 11 12 12 11 11 11 11 	0 1 0 0 0 0 2 1 0 1 0 0 0 0 0 0 
32	aIfDSo	55	2.291	2.759	160	9	0	0	261	[1:F]	21	10 10 11 10 11 10 10 8 9 10 10 10 10 10 10 11 	1 1 0 1 0 1 1 2 1 0 0 0 0 0 1 0 
33	aIfDSo	55	2.634	2.611	184	7	0	0	247	[2:0]	0	11 12 12 12 12 11 12 11 11 11 12 11 11 12 12 11 	1 0 0 0 0 1 0 1 1 1 0 1 0 0 0 1 
34	aIfDSo	55	2.205	2.505	154	21	0	0	237	[2:1]	0	9 11 8 10 11 11 10 8 10 9 10 9 11 10 8 9 	2 0 3 1 0 0 1 2 1 2 1 2 0 1 3 2 
35	aIfDSo	55	2.563	2.537	179	4	0	0	240	[2:2]	20	11 11 11 11 9 12 12 12 12 12 11 11 11 11 11 11 	0 0 0 1 3 0 0 0 0 0 0 0 0 0 0 0 
36	aIfDSo	55	2.434	2.653	170	5	0	0	251	[2:3]	21	11 11 11 11 9 10 10 11 11 10 11 11 11 11 11 10 	0 0 0 0 2 1 1 0 0 0 0 0 0 0 0 1 
37	aIfDSo	55	2.334	2.706	163	28	0	0	256	[2:4]	80	11 9 9 10 9 10 8 11 11 10 11 11 11 11 11 10 	1 3 2 2 3 2 4 1 1 2 1 1 1 1 1 2 
38	aIfDSo	55	2.520	2.674	176	15	0	0	253	[2:5]	21	10 11 11 12 12 12 10 11 11 12 12 11 10 10 10 11 	2 1 1 0 0 0 1 1 1 0 0 1 2 2 2 1 
39	aIfDSo	55	2.147	2.674	150	41	0	0	253	[2:6]	63	9 9 10 11 11 10 11 10 9 8 6 8 9 9 9 11 	3 3 2 1 1 2 0 2 3 4 6 4 3 3 3 1 
40	aIfDSo	55	2.291	2.653	160	17	0	0	251	[2:7]	40	10 9 10 11 11 7 11 10 11 9 10 10 10 10 10 11 	1 2 1 0 0 4 0 1 0 2 2 1 1 1 1 0 
41	aIfDSo	55	2.649	2.579	185	14	0	0	244	[2:8]	21	10 11 11 10 12 12 12 13 11 12 12 12 13 13 10 11 	2 1 1 2 0 0 0 0 2 1 1 1 0 0 2 1 
42	aIfDSo	55	2.706	2.611	189	9	0	0	247	[2:9]	36	12 13 13 11 12 12 11 10 11 11 12 12 12 12 12 13 	1 0 0 2 1 0 1 2 1 1 0 0 0 0 0 0 
43	aIfDSo	55	2.190	2.632	153	25	0	0	249	[2:A]	42	11 11 9 9 11 11 10 9 7 9 9 10 10 10 9 8 	0 0 2 2 1 1 1 2 4 2 2 1 1 1 2 3 
44	aIfDSo	55	2.677	2.685	187	7	0	0	254	[2:B]	21	12 11 11 12 12 11 13 13 12 10 12 12 12 10 12 12 	0 1 1 0 0 1 0 0 0 2 0 0 0 2 0 0 
45	aIfDSo	55	2.391	2.664	167	14	0	0	252	[2:C]	56	9 10 10 10 11 12 12 11 10 9 11 11 10 11 10 10 	2 1 2 2 1 0 0 0 1 2 0 0 1 0 1 1 
46	aIfDSo	55	2.377	2.695	166	32	0	0	255	[2:D]	25	9 9 11 9 10 8 9 12 13 13 9 11 11 11 11 10 	3 3 1 3 3 5 4 1 0 0 3 1 1 1 1 2 

[mr_rulezzz]

d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.

how many is it in ohm on resistor?

[goxed]

d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.

how many is it in ohm on resistor?

i usually donot measure ohms, I measure the output voltage of the regulator. But I think it should be between 1.05 to 1.08K on the mounted resistor.

[mr_rulezzz]

d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.

how many is it in ohm on resistor?

i usually donot measure ohms, I measure the output voltage of the regulator. But I think it should be between 1.05 to 1.08K on the mounted resistor.

what about the area around the chip? you think this copper heatsinks are enough for dropping temp? ... how high is temp actualy? =)
sorry my english soo bad^^

[darkfriend77]

d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.

how many is it in ohm on resistor?

i usually donot measure ohms, I measure the output voltage of the regulator. But I think it should be between 1.05 to 1.08K on the mounted resistor.

thanx a lot for your report ... :-)

gona add it as .. hardcore moding version ...

[darkfriend77]

Added:

HC Hardware Tuning:

Here's How I did it:

a) Buy Copper VGA RAM Heatsinks. Usually ships in sets of 8, so 2 packs per h-board.

a.1) I bought these:  http://www.ebay.com/itm/161102078777?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

b) Affix each piece of VGA RAM Heatsink to the back of each BitFury chip on the H-Board. The RAM heatsinks come with thermal adhesives affixed.

c) Cut a 2 inch strip of DDR3 / DDR2 RAM heatskink for cooling the regulator area. Affix the heatsink to the back of board near the regulator with either thermally conductive glue or use some kind of thermal paste and small dabs of superglue / epoxy at the edges

d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.

e) Cool the boards with 120mm or bigger cooling fans.

f) Play around with best.cnf (I first changed of all the chip speeds to 54, and measured nonce rate after 10mins of hashing, then changed to 55 and again measured nonce rates. Compared the differences on a excel spreadsheet, and chose 54 or 55 depending on which produced higher hash rates for the chip.)

g) I Use only one pool for mining

h) renice the miner process to -14 or lower

Code:

 2100 root        6 -14 33196 18864  4064 R 81.0  3.8 36h27:30 python ./mining_proxy.py -o us3.eclipsemc.com -p 3333 -cu XXXXXXXXXXX -cp XXXX -gp 8332 -v

h.1) I use htop to do it
h.1.1) sudo apt-get install htop
h.1.2) pi@bitfury / $ htop
h.1.3) Press F7 repeatedly to reduce nice.

[Cablez]

Two quick questions on the goxxed info.  1) What points are you using exactly to measure the altered voltage?   I am leery to probe around the board while powered up for fear of shorting something.
                                                        2) What exactly is reniceing and why is it important to reduce?  This is the first time I have seen this term used in the bitfury threads.

Thanks very much and awesome work! 

[juhakall]

Two quick questions on the goxxed info.  1) What points are you using exactly to measure the altered voltage?   I am leery to probe around the board while powered up for fear of shorting something.
                                                        2) What exactly is reniceing and why is it important to reduce?  This is the first time I have seen this term used in the bitfury threads.

Thanks very much and awesome work!  

I'm really curious about 1) too.

Reniceing is just the linux way to set processing priority for a task. You might want the miner process to have a high priority. I'd expect this to not matter much, or be set by default. Maybe it really helps, I'm trying on mine now.

[darkfriend77]

Two quick questions on the goxxed info.  1) What points are you using exactly to measure the altered voltage?   I am leery to probe around the board while powered up for fear of shorting something.
                                                        2) What exactly is reniceing and why is it important to reduce?  This is the first time I have seen this term used in the bitfury threads.

Thanks very much and awesome work!  

I'm really curious about 1) too.

Reniceing is just the linux way to set processing priority for a task. You might want the miner process to have a high priority. I'd expect this to not matter much, or be set by default. Maybe it really helps, I'm trying on mine now.

:-) jep, maybee a small picture ... where and how to ... measure the altered voltage would help ... us ... .-)

[-Redacted-]

"Nice" is a term used to describe the priority of a process running under UNIX. The nicer a task is, the more it "yields" to others and the lower the priority that it runs at.  "Renice" - means changing the nice value, typically increasing the nice value and lowering the priority of a task.  Since interrupts are pre-emptive, tasks don't really "yield" - something with a higher nice value gets preempted (interrupted) more often.

The root user can lower the nice value of a process, increasing its priority and lengthing the interval between preempts - making it "less nice".  It is possible to lower a task's nice value to the point where it has more priority than the kernel, thereby guaranteeing that your Unix system will crash if your code makes a system call of any kind.  On a system that is not very busy, raising or lowering the nice value doesn't have much of an effect.    

[Cablez]

Thanks for the info on niceing guys.  As you may have guessed I am not a big 'nix guy....learning.  Looks like I do this on windows a lot for demanding processes so its just a matter of vocabulary. 

Has there been info given yet about increasing the priority of the mining process yielding better hash results?