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goxed

legendary

Activity: 1946

Merit: 1006

Bitcoin / Crypto mining Hardware.

Quote from: Soros Shorts on November 06, 2013, 05:50:29 AM

Quote from: goxed on November 06, 2013, 04:52:42 AM

Add sinks ... and reduce STRESS in your life Wink

.

I don't know about that ... sticking on $400 worth of tiny heatsinks per rig was a pretty stressful and time consuming experience for me. I wish somebody would make custom heatsinks for these.

It's a one time exercise, and then peace of mind.

$400 :O They usually sell for $40 good for 4 cards. Actually, I realized after sometime that heatsinking only the bottom 2 rows is sufficient to keep the regulator cool.
I see that heat-sinks you used are a different that the VGA RAM sinks.

Soros Shorts

donator

Activity: 1617

Merit: 1012

Quote from: goxed on November 06, 2013, 04:52:42 AM

Add sinks ... and reduce STRESS in your life Wink

.

I don't know about that ... sticking on $400 worth of tiny heatsinks per rig was a pretty stressful and time consuming experience for me. I wish somebody would make custom heatsinks for these.

Doff

sr. member

Activity: 327

Merit: 250

Quote from: goxed on November 06, 2013, 04:55:49 AM

Quote from: Doff on November 06, 2013, 04:50:21 AM

I bought a Multimeter to be able to check the voltage, however I do not know where on the board you would test that. If someone could make a screenshot of that I would really appreciate it, or maybe it already exists?

I have tried all sorts of fans and none seem to keep the regulator cool enough to keep them from cycling. Mine just turn off as well, and do not come back up.

Check voltage on top of the inductor (grey box with PULSE printed on it and any of the GND pin from the PCIE power supply)

Ahh, that's how you do it. Thank you.

Doff

sr. member

Activity: 327

Merit: 250

I did that actually, but I am still having issues with it. It made them stay up a tad longer before they started dropping off.

goxed

legendary

Activity: 1946

Merit: 1006

Bitcoin / Crypto mining Hardware.

Quote from: Doff on November 06, 2013, 04:50:21 AM

I bought a Multimeter to be able to check the voltage, however I do not know where on the board you would test that. If someone could make a screenshot of that I would really appreciate it, or maybe it already exists?

I have tried all sorts of fans and none seem to keep the regulator cool enough to keep them from cycling. Mine just turn off as well, and do not come back up.

Check voltage on top of the inductor (grey box with PULSE printed on it and any of the GND pin from the PCIE power supply)

goxed

legendary

Activity: 1946

Merit: 1006

Bitcoin / Crypto mining Hardware.

If you donot add heatsinks to the regulator area, cards will cycle. The real point of adding heatsinks to the ASIC is to keep the regulator cool. Add sinks to the regulator and atleast the bottom 2 rows of ASICS and reduce STRESS in your life Wink

.
BTW, I also did another mod, but I will not advise anyone to do that unless they know what they are doing. It's obvious if you look at my H-card very carefully.

Doff

sr. member

Activity: 327

Merit: 250

I bought a Multimeter to be able to check the voltage, however I do not know where on the board you would test that. If someone could make a screenshot of that I would really appreciate it, or maybe it already exists?

I have tried all sorts of fans and none seem to keep the regulator cool enough to keep them from cycling. Mine just turn off as well, and do not come back up.

Soros Shorts

donator

Activity: 1617

Merit: 1012

Quote from: achimsmile on November 06, 2013, 01:51:13 AM

Quote from: tacotime on November 05, 2013, 10:55:46 PM

Yeah so that one board is still bad. Keeps shutting itself off even if I downclock it so the onboard temps are only 30-40C. I guess I'll have to talk to dave about RMAing it. This happens no matter what slot it's in.

Same thing happened to me, chips were cool enough. Turned out that the power regulator was too hot, despite heatsinks (I measured 90°C with IR-Thermometer). I moved the 3 fans from the top to the side of the regulator, which helped a lot. Now my 10 Boards are stable at 345-355 GH/s.

Aren't these new H-cards supposed to have trim pots that would allow you to reduce the voltage output of the regulator? The voltage preset at the factory may just be a little too high for your operating environment. This symptom was common with the August H-cards if you "over pencil mod" them. I have yet to receive my Oct kits, but if this were to happen to mine I would try reducing the voltage a little on those cards that were shutting down.

achimsmile

legendary

Activity: 1225

Merit: 1000

Quote from: tacotime on November 05, 2013, 10:55:46 PM

Yeah so that one board is still bad. Keeps shutting itself off even if I downclock it so the onboard temps are only 30-40C. I guess I'll have to talk to dave about RMAing it. This happens no matter what slot it's in.

Same thing happened to me, chips were cool enough. Turned out that the power regulator was too hot, despite heatsinks (I measured 90°C with IR-Thermometer). I moved the 3 fans from the top to the side of the regulator, which helped a lot. Now my 10 Boards are stable at 345-355 GH/s.

Keefe

hero member

Activity: 681

Merit: 500

I just powered up my new full rig, v3.0 M-board, 16 v2.2 H-boards. No heatsinks, 3 fans side by side (120mm, 148 cfm each). Getting 575 GH/s without tweaking. Using 622W at the wall, plus 30W for the fans (PSU is 86% efficient). Very nice!

The v3.0 M-board has two 6-pin PCIe power sockets and also the screw terminals like the v1.0 M-boards. Using an extra adapter from an older kit, I'm able to plug 4 cables from my PSU into the M-board. This should solve my concerns about pulling alot of current through just two cables.

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: tacotime on November 05, 2013, 10:55:46 PM

Yeah so that one board is still bad. Keeps shutting itself off even if I downclock it so the onboard temps are only 30-40C. I guess I'll have to talk to dave about RMAing it. This happens no matter what slot it's in.

if you are mixing capacitor and no-capacitor boards, try putting ones with caps behind those without. In theory, this may have a stabilizing effect on the bank depending just how the m-board circuit is laid out. Of course a bad board is a possibility too, but they are very simply designed so there are not many failure modes available (bad chip, broken component, bad solder, etc)

make sure heatsinks are on the backside of the PCB, and put a heatsink on the thermal vias opposite the small volatge regulator. putting a heatsink on the inductor may help as well, as these components are both near thier capable limits at 30A across cards doing >35GH. keeping thier temp down may help

tacotime

legendary

Activity: 1484

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Yeah so that one board is still bad. Keeps shutting itself off even if I downclock it so the onboard temps are only 30-40C. I guess I'll have to talk to dave about RMAing it. This happens no matter what slot it's in.

tacotime

legendary

Activity: 1484

Merit: 1005

Quote from: tom99 on November 05, 2013, 10:21:50 PM

Quote from: tacotime on November 05, 2013, 09:36:50 PM

Code:

bad      off     per chip        good cores
0:      848     35.892  37.522  2507    76      4       0       0       16     00       (2.243/chip)    34%
1:      848     36.307  37.491  2536    15      0       0       0       16     00       (2.269/chip)    35%
2:      848     27.431  27.946  1916    134     16      5       2       16     00       (1.714/chip)    30%
4:      848     35.720  36.708  2495    68      2       0       0       16     00       (2.232/chip)    34%
5:      848     37.180  37.152  2597    14      1       0       0       16     00       (2.324/chip)    35%
6:      848     38.898  38.917  2717    8       2       0       0       16     00       (2.431/chip)    36%
8:      848     33.000  34.309  2305    82      4       0       0       16     00       (2.062/chip)    32%
9:      848     33.529  36.698  2342    82      1       0       0       16     00       (2.096/chip)    32%
A:      848     0.000   0.000   0       0       0       0       0       16     00       (0.000/chip)    9%      speed down
C:      848     35.648  36.793  2490    16      1       0       0       16     00       (2.228/chip)    34%

So, yeah, I have 1 bad H-board it appears. It throttles down for about 15 minutes and then just goes to 0 GH/s

Uh, are these still covered under warranty if I heatsinked the back, Dave?

Edit: This is interesting, a second board just did the same thing. :|

Your Hboard maybe overheat that why Hboard shutdown and you need better cooling.

Thermal diode reports chips are 51 C VRM is 54 C :|

I swapped the cards into different slots and now they're both no longer throwing lots of errors or shutting down

Clearly H-boards are delicate flowers

Most recent stats:

Code:

board-2 speed   nrate   hrate   good    errors  spi-err miso-er duplic  good   bad      off     per chip        good cores
0:      848     36.851  37.195  2574    75      0       1       0       16     00       (2.303/chip)    19%
1:      848     35.419  37.290  2474    9       1       0       0       16     00       (2.214/chip)    18%
2:      848     37.452  38.685  2616    18      1       0       0       16     00       (2.341/chip)    19%
4:      848     35.262  36.434  2463    60      2       0       0       16     00       (2.204/chip)    18%
5:      848     36.035  36.846  2517    18      1       0       0       16     00       (2.252/chip)    19%
6:      848     37.982  38.600  2653    8       0       0       0       16     00       (2.374/chip)    20%
8:      848     31.668  34.045  2212    77      1       0       0       16     00       (1.979/chip)    17%
9:      848     34.847  36.550  2434    69      0       0       0       16     00       (2.178/chip)    18%
C:      848     35.777  36.518  2499    30      2       0       0       16     00       (2.236/chip)    19%
D:      848     32.885  31.941  2297    13      1       2       0       16     00       (2.055/chip)    17%

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: tom99 on November 05, 2013, 10:21:50 PM

Quote from: tacotime on November 05, 2013, 09:36:50 PM

Code:

bad      off     per chip        good cores
0:      848     35.892  37.522  2507    76      4       0       0       16     00       (2.243/chip)    34%
1:      848     36.307  37.491  2536    15      0       0       0       16     00       (2.269/chip)    35%
2:      848     27.431  27.946  1916    134     16      5       2       16     00       (1.714/chip)    30%
4:      848     35.720  36.708  2495    68      2       0       0       16     00       (2.232/chip)    34%
5:      848     37.180  37.152  2597    14      1       0       0       16     00       (2.324/chip)    35%
6:      848     38.898  38.917  2717    8       2       0       0       16     00       (2.431/chip)    36%
8:      848     33.000  34.309  2305    82      4       0       0       16     00       (2.062/chip)    32%
9:      848     33.529  36.698  2342    82      1       0       0       16     00       (2.096/chip)    32%
A:      848     0.000   0.000   0       0       0       0       0       16     00       (0.000/chip)    9%      speed down
C:      848     35.648  36.793  2490    16      1       0       0       16     00       (2.228/chip)    34%

So, yeah, I have 1 bad H-board it appears. It throttles down for about 15 minutes and then just goes to 0 GH/s

Uh, are these still covered under warranty if I heatsinked the back, Dave?

Edit: This is interesting, a second board just did the same thing. :|

Your Hboard maybe overheat that why Hboard shutdown and you need better cooling.

this. When i pencil mod my 2-card rig, the maximum i can run stable is about 38.5-39GH per card. If i run higher than that, they become sensitive to the changes in ambient temperature (my apartment always gets hot in the evening) and would do what youve seen, where chips drop to zero and either restart again a few minutes later or require me to stop/start miner.

you either need better cooling to the card, or slightly tune back its performance. whats with your card 2 btw? 27Gh and lots of errors - is that also cycling between 36->27->36? if so it needs better cooling also and it will be stable

tom99

sr. member

Activity: 420

Merit: 250

Quote from: tacotime on November 05, 2013, 09:36:50 PM

Code:

bad off per chip good cores
0: 848 35.892 37.522 2507 76 4 0 0 16 00 (2.243/chip) 34%
1: 848 36.307 37.491 2536 15 0 0 0 16 00 (2.269/chip) 35%
2: 848 27.431 27.946 1916 134 16 5 2 16 00 (1.714/chip) 30%
4: 848 35.720 36.708 2495 68 2 0 0 16 00 (2.232/chip) 34%
5: 848 37.180 37.152 2597 14 1 0 0 16 00 (2.324/chip) 35%
6: 848 38.898 38.917 2717 8 2 0 0 16 00 (2.431/chip) 36%
8: 848 33.000 34.309 2305 82 4 0 0 16 00 (2.062/chip) 32%
9: 848 33.529 36.698 2342 82 1 0 0 16 00 (2.096/chip) 32%
A: 848 0.000 0.000 0 0 0 0 0 16 00 (0.000/chip) 9% speed down
C: 848 35.648 36.793 2490 16 1 0 0 16 00 (2.228/chip) 34%

So, yeah, I have 1 bad H-board it appears. It throttles down for about 15 minutes and then just goes to 0 GH/s

Uh, are these still covered under warranty if I heatsinked the back, Dave?

Edit: This is interesting, a second board just did the same thing. :|

Your Hboard maybe overheat that why Hboard shutdown and you need better cooling.

GandalfG

sr. member

Activity: 259

Merit: 250

Dig your freedom

Quote from: tacotime on November 05, 2013, 09:53:44 PM

Okay, this is interesting. There are two problem boards, and they keep shutting off as if they're thermocycling or something (go up to 36 GH/s, slowly go to zero, then suddenly go back to full speed). The chips on these boards are fine by temperatures, all less than 60 C.

In the first slots try to keep the best cards. These problems in the past.
Move from slot A to last - C ?

tacotime

legendary

Activity: 1484

Merit: 1005

Okay, this is interesting. There are two problem boards, and they keep shutting off as if they're thermocycling or something (go up to 36 GH/s, slowly go to zero, then suddenly go back to full speed). The chips on these boards are fine by temperatures, all less than 60 C.

tacotime

legendary

Activity: 1484

Merit: 1005

Code:

bad off per chip good cores
0: 848 35.892 37.522 2507 76 4 0 0 16 00 (2.243/chip) 34%
1: 848 36.307 37.491 2536 15 0 0 0 16 00 (2.269/chip) 35%
2: 848 27.431 27.946 1916 134 16 5 2 16 00 (1.714/chip) 30%
4: 848 35.720 36.708 2495 68 2 0 0 16 00 (2.232/chip) 34%
5: 848 37.180 37.152 2597 14 1 0 0 16 00 (2.324/chip) 35%
6: 848 38.898 38.917 2717 8 2 0 0 16 00 (2.431/chip) 36%
8: 848 33.000 34.309 2305 82 4 0 0 16 00 (2.062/chip) 32%
9: 848 33.529 36.698 2342 82 1 0 0 16 00 (2.096/chip) 32%
A: 848 0.000 0.000 0 0 0 0 0 16 00 (0.000/chip) 9% speed down
C: 848 35.648 36.793 2490 16 1 0 0 16 00 (2.228/chip) 34%

So, yeah, I have 1 bad H-board it appears. It throttles down for about 15 minutes and then just goes to 0 GH/s

Uh, are these still covered under warranty if I heatsinked the back, Dave?

Edit: This is interesting, a second board just did the same thing. :|

tacotime

legendary

Activity: 1484

Merit: 1005

Quote from: tom99 on November 05, 2013, 09:05:20 PM

Quote from: tacotime on November 05, 2013, 08:56:03 PM

The slots are no longer labeled "A1 A2" etc, rather now they are just 0 1 2 3 .. E F

My bad performing card is in slot 7 and I haven't tried to the other slots out yet

edit: Slot 7 card just died, I will move it to a new slot and see if it hashes any better there

2nd edit: Okay, there ARE banks, they just arent labeled on the PCB. Messing around with trying them in different banks now

Did you use fan on Hboards?

3x CM R4 @ 2k RPM, 120mm

Hboards are also heatsinked

tom99

sr. member

Activity: 420

Merit: 250

Quote from: tacotime on November 05, 2013, 08:56:03 PM

The slots are no longer labeled "A1 A2" etc, rather now they are just 0 1 2 3 .. E F

My bad performing card is in slot 7 and I haven't tried to the other slots out yet

edit: Slot 7 card just died, I will move it to a new slot and see if it hashes any better there

2nd edit: Okay, there ARE banks, they just arent labeled on the PCB. Messing around with trying them in different banks now

Did you use fan on Hboards?

Topic: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** - page 76. (Read 576787 times)

Topic: [ANN] US/North American Bitfury sales NEW STOCK NOW SHIPPING - page 76. (Read 576787 times)