ANTMINER C1 Discussion and Support Thread

[tbolt]

The large tank pump has arrived from China but the other two pumps have been moving water with no loss for quite some time so I won't disturb the setup.  My two C1's are running at 37/39/37/38° & 36/40/38/40° so I like water cooling.  These board are the same as the S3+'s if I'm not mistaken but well cooled so capable of higher hashrate?  I'm running my C1's 243.75M/00675v/981GH/s for lower current on the line.  One S3+ is running at 42/39° and the other with a single board is 39°.  The one with the single board had started to heat up so I removed a cheesecloth filter dropping the temps down from mid-50° to the 40°'s but perhaps the damage had already been done.  The next day one of its boards had failed.  The higher temp meant higher current due to increased inefficiency and some damage occurred.  So, I like the water cooling.  I'd like to put water blocks in the S3+'s.

You can buy the Water blocks..
http://shop.syscooling.com/goods.php?id=47

but, remember the C1 also has the Air Cooled Heatsinks
email syscooling, I bet they make those also..

[1714607428]

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[1714607428]

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[1714607428]

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[soy]

The large tank pump has arrived from China but the other two pumps have been moving water with no loss for quite some time so I won't disturb the setup.  My two C1's are running at 37/39/37/38° & 36/40/38/40° so I like water cooling.  These board are the same as the S3+'s if I'm not mistaken but well cooled so capable of higher hashrate?  I'm running my C1's 243.75M/00675v/981GH/s for lower current on the line.  One S3+ is running at 42/39° and the other with a single board is 39°.  The one with the single board had started to heat up so I removed a cheesecloth filter dropping the temps down from mid-50° to the 40°'s but perhaps the damage had already been done.  The next day one of its boards had failed.  The higher temp meant higher current due to increased inefficiency and some damage occurred.  So, I like the water cooling.  I'd like to put water blocks in the S3+'s.

You can buy the Water blocks..
http://shop.syscooling.com/goods.php?id=47

but, remember the C1 also has the Air Cooled Heatsinks
email syscooling, I bet they make those also..

Nice.  Thanks.

I see the ribbon cables will conflict if both board are orientated top up.  Or one could buy two water blocks and only put a single board on each so as to have the distance.

[tbolt]

The large tank pump has arrived from China but the other two pumps have been moving water with no loss for quite some time so I won't disturb the setup.  My two C1's are running at 37/39/37/38° & 36/40/38/40° so I like water cooling.  These board are the same as the S3+'s if I'm not mistaken but well cooled so capable of higher hashrate?  I'm running my C1's 243.75M/00675v/981GH/s for lower current on the line.  One S3+ is running at 42/39° and the other with a single board is 39°.  The one with the single board had started to heat up so I removed a cheesecloth filter dropping the temps down from mid-50° to the 40°'s but perhaps the damage had already been done.  The next day one of its boards had failed.  The higher temp meant higher current due to increased inefficiency and some damage occurred.  So, I like the water cooling.  I'd like to put water blocks in the S3+'s.

You can buy the Water blocks..
http://shop.syscooling.com/goods.php?id=47

but, remember the C1 also has the Air Cooled Heatsinks
email syscooling, I bet they make those also..

Nice.  Thanks.

I see the ribbon cables will conflict if both board are orientated top up.  Or one could buy two water blocks and only put a single board on each so as to have the distance.

Right, the cables would be a consideration.

Also, some earlier revision S3 boards have the data cable connector mounted
on the back side of the board.

The C1 boards are delivered with ribbon connectors all on the component side of the board.
Makes it easier to plug in ribbon cable if you have back to back boards mounted on a water block situation.

It's possible to twist the cable and squeeze it in between two boards on a C1 if you
have an older rev hashing board.. if, the cable will reach.

[mavericklm]

no more c1???
yesterday or Sunday it was still available...
 

[tbolt]

Batch 4?

C2 (with the higher density chips) ?

[notlist3d]

Batch 4?

C2 (with the higher density chips) ?

Is the bitmain website down for anyone else? *it is up now for me.

The C1 is not a option now to buy.

[dunand]

Batch 4?

C2 (with the higher density chips) ?

I would be so happy if they make a C2. Or an upgrade kit for the C1.

[Ecnad]

Love my C1 as noise is an issue for me. a C2 would be on my buy list for sure.

[thedreamer]

Love my C1 as noise is an issue for me. a C2 would be on my buy list for sure.

I agree. If they'd hash more efficiently, they'd be a win win.

[notlist3d]

Love my C1 as noise is an issue for me. a C2 would be on my buy list for sure.

I agree. If they'd hash more efficiently, they'd be a win win.

If they do I just beg of them not to team up with syscooling.  Please Bitmain find a new partner on water cooling side if you do a C2.

[soy]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

[pekatete]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

That may be due to heat paste decay. BTW, not sure whether that term actually exists, but it is one that I relate to gradual loss of abilities in heat dissipation, either due to a rise in ambient temps or heat paste losing it's conductive properties. I coined that from my laptop repair days where a clean out of heat paste from the CPU )and GPU) coupled with an application of new paste cured most random shutdowns. I have to say I upgraded all my antminers to heatpads (good quality ones).

[soy]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

That may be due to heat paste decay. BTW, not sure whether that term actually exists, but it is one that I relate to gradual loss of abilities in heat dissipation, either due to a rise in ambient temps or heat paste losing it's conductive properties. I coined that from my laptop repair days where a clean out of heat paste from the CPU )and GPU) coupled with an application of new paste cured most random shutdowns. I have to say I upgraded all my antminers to heatpads (good quality ones).

I haven't ripped down a C1 yet.  Started but quit.  You use paste on the side to the waterblock?

[notlist3d]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

Some act better then others.  It seems that each one has it's own personality.  I have one it could run a month without touching it.  No issues at all.

Other a few times a week it likes a power off/on. I have not looked at paste, redoing it might fix the problem.  But I have taken easy route so far.

[soy]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

That may be due to heat paste decay. BTW, not sure whether that term actually exists, but it is one that I relate to gradual loss of abilities in heat dissipation, either due to a rise in ambient temps or heat paste losing it's conductive properties. I coined that from my laptop repair days where a clean out of heat paste from the CPU )and GPU) coupled with an application of new paste cured most random shutdowns. I have to say I upgraded all my antminers to heatpads (good quality ones).

Seems to be dropping again.  Down to 930GH/s.  May have to rip it apart.  The good C1 has temps 34,35,34,35 while this is 32,35,38,35.  It's running  hotter.  Cooler water going in but higher temps.  That 38 board is what I see.

[notlist3d]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

That may be due to heat paste decay. BTW, not sure whether that term actually exists, but it is one that I relate to gradual loss of abilities in heat dissipation, either due to a rise in ambient temps or heat paste losing it's conductive properties. I coined that from my laptop repair days where a clean out of heat paste from the CPU )and GPU) coupled with an application of new paste cured most random shutdowns. I have to say I upgraded all my antminers to heatpads (good quality ones).

Seems to be dropping again.  Down to 930GH/s.  May have to rip it apart.

If you happen to please document it.  Share it and tell us results.  I have one myself I'm not sure that it might benefit from it.

[MyRig]

Please let us know what you found out!!! 

[pekatete]

I haven't ripped down a C1 yet.  Started but quit.  You use paste on the side to the waterblock?

Yep, the pads are only on the chips and paste remains on the block side, though if it needs a retouch / top-up do that as well.
If you decide to re-do the chip-top paste (or replace with pads), have some paste remover / cleaner, a fine bristle brush and compressed air at the ready (the latter two optional but handy).

[soy]

Odd.  I've been running my two C1's at 243.75/0675,960-985GH/s so they'd last longer.  One has dropped a hundred GH/s to 848GH/s repeatedly the last few days.  Raised the voltage from 0675 to 0700 and again have 977.44GH/s(avg) after an hour.  It had been running so well at 0675 and the only change was that I moved the miner from the bottom shelf of a 4 shelf cart to the top.  Dust buildup rate while on the bottom shelf was too much to ask.  Low pressure air cleaning of internal dust while it was shut down didn't return it to its former rate at 0675.

That may be due to heat paste decay. BTW, not sure whether that term actually exists, but it is one that I relate to gradual loss of abilities in heat dissipation, either due to a rise in ambient temps or heat paste losing it's conductive properties. I coined that from my laptop repair days where a clean out of heat paste from the CPU )and GPU) coupled with an application of new paste cured most random shutdowns. I have to say I upgraded all my antminers to heatpads (good quality ones).

Seems to be dropping again.  Down to 930GH/s.  May have to rip it apart.

If you happen to please document it.  Share it and tell us results.  I have one myself I'm not sure that it might benefit from it.

It's Saturday morning and last night I had decided to rip it apart and repaste.  I decided this because an S3+ board ran hot a couple of days and then even tho I belatedly improved its cooling, the board went belly up - entirely.  But I got up earlier than usual.  I turned the C1 off but then decided to go back to bed and deal with it after breakfast so turned it back on.  The third chain had been running hot.  Before turning it back on I rearranged the cabling somewhat.  Now, during breakfast I glance over and it's been back up for well over 2 hours and not only has the hashrate remained good but temperature on chain 3 is just right.  So, I suspect a connector, cable or supply.  Each of the 4 supplies, one to each board and each supply having two cables, has its own DVM at the supply.  So the problem isn't the supply for that board not providing properly I think but maybe a crack at the solder joint on the board or bad connector.  I make my own cables and the last batch of PCIE-6 connectors I got in were a mixed batch - two different quality, gauge, wires.  I've been splicing these to 14 gauge, 15 amp wire.  I have some doubts about placing the DVMs on the supplies next to the voltage adjustment pot.  I may move them to the PCIE-6 end or splice in a thin wire pair at the PCIE-6 and run it back to the supply leaving the DVM on the supply but reading the voltage at the PCIE-6.  I might do better extracting the pins from the connectors and affixing pins directly on the 14 gauge.  But for now, if my having disturbed the wiring before turning it back on has corrected the problem and that chain 3 doesn't heat, then I'll leave it be until it goes bad and go about getting pins for the connectors.

[soy]

I haven't ripped down a C1 yet.  Started but quit.  You use paste on the side to the waterblock?

Yep, the pads are only on the chips and paste remains on the block side, though if it needs a retouch / top-up do that as well.
If you decide to re-do the chip-top paste (or replace with pads), have some paste remover / cleaner, a fine bristle brush and compressed air at the ready (the latter two optional but handy).

I like your idea.  I have cleaned the ASICs using a 1" soft bristle paint brush cut off at 3/4" and acetone.  I sometimes use auto brake cleaner.  I do use compressed air to blow off the liquified paste. 

I like your idea because thermal conductive pads on the ASICs don't mess up the pins or provide a material dust in the air flowing by can adhere to.