Topic: ANTMINER C1 Discussion and Support Thread - page 43. (Read 129188 times)

Interesting.  I may give your suggestion a test eventually.  One thing I did notice with my unnamed cheap adjustable power supplies, since I flipped my rad fans so I could have the ports and wires inside a window, and I note it was raining when I did the flip, my power at the wall has gone from 860 watts to 880 watts.  I check my voltage at the miner and it's 12.08vdc same as it had been when I set it up (setting the voltage at 12.15vdc no load), then I checked the wall voltage.  The wall voltage is at 118.1.  When I shut down the miner it comes back to 120.1vac.  The miner is on one of two lines I ran to the living room for AC and my treadmill.  I'm kicking myself for not running 12-2 Romex instead of 14-2.  These two lines run to to a pair of half size circuit breakers.  The room temperature has come up from mid-60's to high 70's.  Outside temperature has come up 20° since the low power days of 860 watts at the wall (includes the pump).  So, when it's raining and the indoor humidity is 56.5%, cooling is reduced (low mass air drawing away less heat) and efficiency drops.  Also perhaps my cheap power supplies efficiencies drop in a warmer room and high humidity.

I'm running the C1 on 4 PCI-E connectors.  I had ordered another 4 of the connectors late and they arrived at my post office box the other day and I'm about to run into town for those.  So, later today the C1 will be running on 8 PCI-E lines.  Presently the leads to the 4 connectors are warm, dropping voltage.  So, before I install the new leads I'll carefully check the power at the wall.  If it's as you indicate, the reduced voltage drop between my supplies and the miner should cause an increase in power consumption - unless the efficiency of my power supplies suffer as the miner improves - the supplies are running at ½ full load each.

Really wouldn't recommend it. Even if the chips can make it up there, you don't know about the other components on the board (which also aren't watercooled).

I am not sure if I didn't missed something, but did anyone do a real OC? I mean OVER 275MHz?

I am currently doing 1.2TH at 300MHz @ 0.775-0.815V, did anybody tried more? how is the GH/W?

C1 at 100-275MHz has following chart, it should be similar as on other devices based on BM1382 chips - S3, U3 and S4.

100MHz @ 0.625V
(ASICs do not work below this voltage)  :   192W =0.48W/GH
175MHz @ 0.650V                              :   356W =0.51W/GH
250MHz @ 0.720V                              :   650W =0.65W/GH
250MHz @ 0.760V                              :   662W =0.66W/GH
275MHz @ 0.760V                              :   809W =0.74W/GH
275MHz @ 0.800V                              :   900W =0.82W/GH
300MHz @ 0.815V                              :  1052W =0.88W/GH

Hope anyone is interested.

Please note that best W/GH ratio can be reached by lowering input 12V voltage, such as 9V, but highest eff. power supply can be done only at high voltages (12V and up) which can also dismiss conducting losses between PSU and miner.

This measurement was done at miner, not at the wall.
 

Considering it.  Just for practice today, since I have two S3+'s that work well tho one a little better than the other, I ripped apart the slightly slower S3+ and reworked the thermal paste.  There was a wealth of thermal paste there unlike my S3's which I reworked.  So my new thermal paste didn't make a great deal of difference.  It is still the slower of the two S3+'s but it's been producing more shares than the faster most of the afternoon and evening.  It may have just been the removal of accumulated dust on the controller board as much as the new thermal paste.

I plan to rip the C1 down and replace the thermal paste but I used most of what I had and just ordered more.

no i don't, could you please provide? (pm or email)

I never tried solo mining but about finding blocks: had a zTex, then USB Block Erupters, then a Blade, then my Jalapeno finally arrived, then I bought a Mercury.  When I got the Mercury hashing it found a Block very quickly.  That has been my only block in couple of years of mining.  That includes the S3's, the S3+'s and now my C1.  Seems to me finding a block is mysterious and rare.

I have multiple miners running.You couldn't only consider about temp.What I want to say about is water pressure.Connecting all miners and cooling system in series has more water pressure than in parallel with splitters in end where you filling with coolant.You will find it's hard to exhaust air.When you have a try you will understand what I said.

It was shipped on 30,December,by DHL.Do you have the tracking NO?

 Also, is it just on or is it connected to a pool and hashing?  If it's on but not hashing then it's not going to get hot.

SYSCOOLING

What is status of order 2014123011433?

I think problem might be there is gap between waterblock and hash board.You could have a try to open C1 and make sure whether every screw on board is tight.

One workaround in the meantime is to use a solo 'pool' like ckolivas's.

It appears as it is C1 does not work with the standard BTC node solo mining. I tried CG 4.61 by itself and it asks for “--btc-address” and would not connect to a server until supplied. I think this is the reason it is not functional.  I must have been seeing things when I thought it worked once.

This is the last response from bitmain after multiple low comprehension emails.
"Sorry to hear that.
there may be some incompatibles with solo mining for C1."

They keep telling me to use their pool and even told me I could user their "solo" setup which sounds like a complete joke...

"suggest you consider to mine with antpool directly. We're using solo mining and will distribute the payment once blocks are found.
stratum.antpool.com:3333, or solo.antpool.com:3333, solo.antpool.com:25 "

Is there a way to supply arguments to firmware containing CG to actually fix my issue? I really expect to be able to connect to the standard client as a server.. seems pretty fundamental for btc mining equipment to be able to do.

I understand everyone is very eager to say how stupid solo is.. I don't care, I am mostly using it to be involved / gambling and for heat...

Are u from Iran? or around that earth parallel?

Dew point is a combination between temperature, humidity and air pressure! if you get under dew point with your aircon, you will make water droplets inside your c1! water and electronics don't mix!

Depending on your air humidity you can look intro a swamp cooler like the farms located in China use.

How much do you pay for electricity?

You should make a thread for your cooling!

Read your post and figured a alternative solution by using the aircond compressor since it already comes with the huge cooling fan.. Since me and my friend are into this new Bitcoin mining and he as a electrical technician helped modify the aircond compressor. We also have a lot of old compressor to spare.. As for outsiders i think you can pick up a 1 HP or 2 HP old compressors at around 50-100USD or maybe free.. just need to topup the aircond gas... From where i'm from a aircond 24 hours a day probably cost me 20USD.. So the single compressor is enough to cool the water for 25 AntMiner Machine...

We are heading to customize a aquarium tomorrow so that it will accommodate 20 C1 AntMiner is a single rack... Once don't i grab a picture..

Why i'm doing this because where i come from all year out is summer... So the machine get really heated up.. so had to find a alternative method.. besides the electricity bills here are way cheaper...

About the "DEW point" at what temperature will create those ? That is why i'm not so sure so i keep it 30-35

It's a mini fridge but me and my friend who is a aircond technician has worked something else out... using the aircond compressor..

@Tukiisan:

Use the normal radiator and only after that cool the liquid for c1's! this way you don't dump all heat on the refrigeration unit.
Put isolation on that ''heat excanger'' also a top!
Put a fan on that fridge compressor! this are not made for non-stop operation
Look for a beer chiller
Check temperatures, humidity and be aware of dew point!

If you want more info i'm the man to ask for
gl hf!

I'm curious to see for how long the fridge compressor can survive. How much electricity is the fridge consuming?

There is no particular advantage to going cooler than that, or even 40-45C. Chips might run slightly more efficient (you can test that yourself with a killawat) but then it depends how much additional power you're spending on the cooling side. Hash rate is unlikely to change noticeably.

Total loop should have taken up about 700-800ml. Those temperatures aren't right at all, sounds like your pump isn't running. How and where is it plugged into?