ANTMINER C1 Discussion and Support Thread

[soy]

Simple harness mod to control voltage for the radiator fans. The radiators fans makes too much noise on 12v. I want to run the pump on 12v and choose the voltage to power the fans between 12v, 8.7v, 7v and 5v!

I have a second batch harness with a 6-pin connector. I changed wires from the connectors with 4 18awg wires. The 4 wires are connected to 12v, 5v, 3.3v and ground from an aux connector on the power supply. I added a terminal strip to choose which voltage I want to use.  The best setting I found is to run the fans on 7v (12v-5v). At 7v I barely notice the noise and the temperature is only 1 or 2 degrees higher. At 5v I have to look to know if the fans are running but it is a little bit less efficient at cooling and the miner fan need to run faster to compensate.

How are you getting the 7vdc?

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[notlist3d]

For those looking for way to do fan (constant level) I still stand by this being best way I have found.

http://www.amazon.com/Phobya-4-Pin-3-Pin-Splitter-Connection/dp/B007S3T4O0/

Molex cable is not used by anything in most C1 installs so use one of those to this and you have 6 3 pin connectors.

[dogie]

Question for dogie or anyone else more electically inclined than me:

I had 2 S3+'s on a 1000W EVGA G2 80+ gold PSU, and the meter showed they were using 1050 w! I put them on a 1300w EVGA and they immediately metered at just under 800w (expected as the frequencies are bumped a bit).
I put the C1 on the same 1000W PSU and it meters at 816 and no problem.
Anyone have an idea of why the high watts with the S3's?

That..... doesn't particularly make any sense, S3s shouldn't get even near to that (like 300W-400W lower). As long as you're mining okay now is the important bit.

[dogie]

Simple harness mod to control voltage for the radiator fans. The radiators fans makes too much noise on 12v. I want to run the pump on 12v and choose the voltage to power the fans between 12v, 8.7v, 7v and 5v!

I have a second batch harness with a 6-pin connector. I changed wires from the connectors with 4 18awg wires. The 4 wires are connected to 12v, 5v, 3.3v and ground from an aux connector on the power supply. I added a terminal strip to choose which voltage I want to use.  The best setting I found is to run the fans on 7v (12v-5v). At 7v I barely notice the noise and the temperature is only 1 or 2 degrees higher. At 5v I have to look to know if the fans are running but it is a little bit less efficient at cooling and the miner fan need to run faster to compensate.

For any kids reading, tape up your open terminals

[dogie]

Hello

Opentoe, I know one person with the same problem with one C1 bath 1.

We configure the miners with standard voltage 0725, the chips to 256Mhz save and aply. Wait 1 minute for save and apply and turn off the miner 1 minutes. Turn on and wait 10 minutes. In the hash rate is less of 900Gh, we continue turn off, wait 1 minute and turn on again until the hast rate is near or 1Th.

Please, is important wait 1 minutes  between turn off and turn on.

Regards.
Antuam.

Really? This is actually a batch 2 unit, but anything to try I guess. The longer it runs, the lower the hashrate. So I'm thinking a buggy firmware with a memory leak that's killing it because when I power cycle it, jumps back up to 1005TH and then slowly starts dropping, real slow.

I'll try this "trick" once it gets back down to 900 again.

Thanks.

Which pool is it on? I don't think its the solution but worth a shot.

I tried Ghash and BTCGUILD. Both steadily dropped the hashing rate to 900 on two of thrm now. Regretting a little a bought 6 of them dince only two are performing at spec.

I don't have a solution for this unfortunately, although the only indication is that you have 4/6 units which degrade over time and its not a widely reported problem. Can you think of anything environmental that might be contributing? Circuits maxing out / getting warmer? I'm sure you're setup is good though.

[dunand]

How are you getting the 7vdc?

The red on 12v and the black on 5v. The difference in voltage is 7v. Google it.

For any kids reading, tape up your open terminals

I think it's not dangerous if I only touch the terminals with my fingers. But I better not short with something conductive. That part was overlooked in the project. I just wrap the whole thing with electrical tape?

[dunand]

http://www.amazon.com/Phobya-4-Pin-3-Pin-Splitter-Connection/dp/B007S3T4O0/

Molex cable is not used by anything in most C1 installs so use one of those to this and you have 6 3 pin connectors.

If you switch the pins on the molex connector that connect to this splitter you can obtain 12v, 7v or 5v. Thats another way to do my mod.

[soy]

How are you getting the 7vdc?

The red on 12v and the black on 5v. The difference in voltage is 7v. Google it.

For any kids reading, tape up your open terminals

I think it's not dangerous if I only touch the terminals with my fingers. But I better not short with something conductive. That part was overlooked in the project. I just wrap the whole thing with electrical tape?

Ah yes.  Happy it works for you.   Personally I'd be hesitant with switching supplies.

[dogie]

How are you getting the 7vdc?

The red on 12v and the black on 5v. The difference in voltage is 7v. Google it.

For any kids reading, tape up your open terminals

I think it's not dangerous if I only touch the terminals with my fingers. But I better not short with something conductive. That part was overlooked in the project. I just wrap the whole thing with electrical tape?

Its probably more dangerous for the supply than it is for you, but the same principles applies regardless of if its 0.1A or 10A. If the tape is decent quality then yeah you can just tape the hell out of it if you don't need access.

[grn]

BITMAIN

you are overwriting etc/cgminer.conf.factory, etc/init.d/bitmainer_setup.sh, etc/init.d/cgminer.sh, etc/rcS.d/S37bitmainer_setup.sh and etc/rcS.d/S70cgminer.sh on system start

where is the source of this? I want to disable

[mindtrip]

i think it would have been a better idea to power this off molex from the factory, powering this off one of the blades is just a poor design to begin with

[soy]

i think it would have been a better idea to power this off molex from the factory, powering this off one of the blades is just a poor design to begin with

My C1 should arrive tomorrow so I have to ask.  The present stock design allows the C1 including pump to be run from 8 PCI-E 8 pin power?  That's all 12vdc.

And alternative wiring schemes have been shown to produce an equal hashrate with a reduction of power at the wall?  Anyone have any numbers on this last?  Or are the alternative wiring schemes for fan noise reduction?

[dunand]

i think it would have been a better idea to power this off molex from the factory, powering this off one of the blades is just a poor design to begin with

My C1 should arrive tomorrow so I have to ask.  The present stock design allows the C1 including pump to be run from 8 PCI-E 8 pin power?  That's all 12vdc.

And alternative wiring schemes have been shown to produce an equal hashrate with a reduction of power at the wall?  Anyone have any numbers on this last?  Or are the alternative wiring schemes for fan noise reduction?

If you are refering to my mod. This is only for quieter operation if you live in a cold area. Now I'm running the fans on 8.7v instead of 12v.

[dogie]

i think it would have been a better idea to power this off molex from the factory, powering this off one of the blades is just a poor design to begin with

Its actually a very good idea. The old harness required you to undo the case which is annoying as hell as you also have to remove the 8 PCI-E, before replacing it all again. The V2 harness simply plugs in immediately with no problems. A molex based harness is okay for some but not okay for others as not all power supplies have molexes. No industrial PSU which quite a portion of people use only have PCI-E cables. They could add molex cables by cutting up some extenders, but then you're back to just the PCI-E harness.

[dogie]

i think it would have been a better idea to power this off molex from the factory, powering this off one of the blades is just a poor design to begin with

My C1 should arrive tomorrow so I have to ask.  The present stock design allows the C1 including pump to be run from 8 PCI-E 8 pin power?  That's all 12vdc.

And alternative wiring schemes have been shown to produce an equal hashrate with a reduction of power at the wall?  Anyone have any numbers on this last?  Or are the alternative wiring schemes for fan noise reduction?

Its 8x PCI-E 6 pin, which for a ~900W miner is overkill anyway. One of the PCI-E ports get take up with the standard harness, which powers the 3x radiator fans and the pump.

No other wiring arrangement will should do anything to power consumption unless you're slowing fans down.

[lovenlifelarge]

My pump died within 2 months of batch 2!

I've emailed bitmain for rma details...

Anyone else had this problem in batch 2??

[fresca]

My pump died within 2 months of batch 2!

I've emailed bitmain for rma details...

Anyone else had this problem in batch 2??

It's a painful process with syscooling.  They will want multiple videos of troubleshooting it with various tutorials that they forward to you.  It could take over two weeks.  My pump was DOA and after back and forth I bought a XSPC that is build much better.  Although at about 70 usd.

[notlist3d]

My pump died within 2 months of batch 2!

I've emailed bitmain for rma details...

Anyone else had this problem in batch 2??

It's a painful process with syscooling.  They will want multiple videos of troubleshooting it with various tutorials that they forward to you.  It could take over two weeks.  My pump was DOA and after back and forth I bought a XSPC that is build much better.  Although at about 70 usd.

I wont go into my story again on pumps.  But i bought 2 of these http://www.ebay.com/itm/380693788606 still working great. 

[dogie]

My pump died within 2 months of batch 2!

I've emailed bitmain for rma details...

Anyone else had this problem in batch 2??

It's a painful process with syscooling.  They will want multiple videos of troubleshooting it with various tutorials that they forward to you.  It could take over two weeks.  My pump was DOA and after back and forth I bought a XSPC that is build much better.  Although at about 70 usd.

Careful with those, I've had about 20 failed XSPC pumps over the years, at least. The good high quality pumps tend to cost an arm and a leg unfortunately, so XSPC always looks enticing.

[syscooling]

My pump died within 2 months of batch 2!

I've emailed bitmain for rma details...

Anyone else had this problem in batch 2??

Could you please kindly send emails to ysun@ysun.net?