Topic: ANTMINER S4 Discussion and Support Thread - page 142. (Read 301481 times)

I too am seeing nowhere near the advertised hash rate poolside, even though the web ui is reporting close to 2100 average.  I am seeing about 1.67 TH poolside average after several hours.

Tom I believe your problem is... those three little bitty x's in that sea of o's (under the "ASIC Status" section in the Antminer web ui screenie you posted).  Good news about that, though!  I had a few too, but they went away.  I also had the miner claiming > 2TH/s in the web UI (and on the LED display) but slush saying (after 3 hours) it was only doing about 1600H/S.

I "fixed it" (basically, by acicdent) just by messing with it, trying all of the levers and dials -- I overclocked and undervolted.  I may have tried every combination of clock speed (over 193Mhz) with both 0725 and 0720 volts.  Lowering the voltage to 0720 got rid of my x's, though it didn't help my hash rate, and since then I've been upping the clock frequency every few hours and not getting x's and getting better and better hash rates, well over the guaranteed 2GH.

So yeah, I recommend throwing caution to the wind and just trying everything to see how it affects you EFFECTIVE hash rate (not the rate you see in the web ui and LED).  Remember to physically power cycle he device whenever you change the voltage (dont just press reboot through the web UI.  That just restarts linux, it doesnt physically cycle the power and reset the hardware).

BTW I got my 16A power cord today, and a Kill A Watt, and a BIG fan to suck all the hot air out of the back of my S4 (and two S3's) through a clothes-dryer type exhaust hose and outside, through the basement wall, using an old dryer exhaust hose, some custom cardboard duct work, aluminum foil tape to hold it all together, and an existing hole in the wall where an old unsused washer dryer hookup used to be.

Once we start getting some more colder days like we did last week (I'm in Pennsylvania) I will turn that 4" inline fan around to pull in cold air from outside, and direct the hot exhaust out of the closet into the basement proper(which is finished, like a family room) for the heat!

good luck turning your x's into o's!

thanks,

-dave

At least the S2's worked.......once you'd re-assembled them.......sort of........

Same here. I have never had an issue with any of my old S1's or current S3's. Something about Bitmain making big miners seems to mess everything up.

I held back because of price but that looks as if it is the least of the S4's problems. Hope for Bitmain these are just isolated incidents,

Well that's not good. Sounds like they pushed the chips too hard. Maybe should have increased the number of chips and reduced W/GH. I'm going to wait for AM's Prism. Lower cost per GH with about the same efficiency.

Doesn't look right for S4 ...pretty "shitty" hashrate...like 4-5% of 2T...

Something is wrong on S4 side...Did you try another pool...like BTCGuild...

ZiG

http://s11.postimg.org/b4ex2e9v7/miners.jpg
http://s29.postimg.org/8s0rivup3/workers.jpg
http://s11.postimg.org/xnvrejuk3/hashrate.jpg

Oh dear, this is not looking good at all.

Looks like p2pool is out of the question then.......time to sell my S4 coupons.

Hello I have 2 S4's and prefer to use Eligius, but I'm also having tons of trouble with that combo.  I don't have any solutions, but wanted to provide data from my equipment for confirmation of the problem.

TESTING:
      Run the miners on separate pools for 5 minute increments and compare results.  I also have 2 S3 Upgrades running in the same 5 min increment for comparison.  All 4 miners are restarted together then when they read 5 min of uptime i took a screenshot of MultiMiner, which shows all the details.

Below is a link to 2 screenshots of the S4s running on Eligius vs Eclipse.  Note the accepted shares and "Effective Hashrate"

http://1drv.ms/1E6MPRV

If the link doesn't treat u well, here is the data.

THE 5 MINUTE HASH    (sounds like breakfast)            
ACCEPTED SHARES            
   S3A   S3B   S4A   S4B
Eclipse   145   144   328   272
Eligius   149   187   48   57
            
EFFECTIVE HASHRATE            
   S3A   S3B   S4A   S4B
Eclipse   525GH/s   428GH/s   1650GH/s   1610GH/s
Eligius   407GH/s   426GH/s   89GH/s   106GH/s

pictures? I see you have no prior posts on the site, interested in your setup

Hi, I have very bad experience with Antminer S4 B1. I ordered 10 psc of S4. Yesterday I received the shipment. I have prepared new electricity (3x 240V 32Amps) and new wiring for more power. Unfortunately, one of them immediately after turning on started stink and smoke. I turned it off. I tried to turn it on one more time but it happened again. I wrote Bitmain but still I have no answer.

Than I started to set up other nine miners. Some miners had set up DHCP some Static IP 192.168.1.99, but it was no problem. When I set up all nine miners I checked hashrate on displays and all miners have hashrate >2TH/s. After one hour I checked hashrate on ELIGIUS pool and I expected higher hashrate then 18TH/s. But I saw only 11TH/s in peak and after next hour the hashrate was only 7TH/s.

I moved miners to Slush pool, create one worker per miner and finally hashrates was from 50GH to 1600GH.

The second issiu that I am not very happy are letters (x) in ASIC status. Six of nine miners have 3-5 (x) in ASIC status. Miners are with basic setting, no overclock with temperatures from 41 to 45°C.

I red that more people have the same problem. Can you help me? Do you have any idea to solve the problem? ...or Bitmains want to be rich quickly and produce low-quality devices.

I am very disgusted with this situation.

My S3's came from Shenzhen straight to Anchorage and never went through Hong Kong. I think they are located in Beijing, China.

Hi,

Are you still planning to ship your miners via Hong Kong?  How would the demonstration in HK affect your logistics?

Hmmmm, could someone tell me what version of cgminer these come with?

Also, if someone wouldn't mind telling me how they fair on p2pool - that would be cool. Even better, point one at my node for 10 mins using a wallet addy as your username:

stratum+tcp://iyftech.zapto.org:9332

.....just so I can see how they perform with p2pool & weather I should get one or not....

Thanks in advance 

Hey guys, changed my difficulty setting on BTC guild and saw a drop in my stales

https://i.imgur.com/7m8JrLB.jpg?1

https://i.imgur.com/zzBidsC.jpg?1

https://i.imgur.com/3dYmurM.jpg?1

I also have this underperforming problem with an S4.
Although the "Mining Status" shows 2000+GH/s I only get ~100GH/s @ghash.io and about 200GH/s at eligius.st.
I am using a 10A power cord since we have 220V here (1400W / 220V = ~6,4A) and do not expect that this is the problem.

I would recommend any suggestions on the performance, thanks.

is there doing to be a comprehensive tech thread ? I would like to know things like "replacement PSU" , photos of parts ext like with products past .

you'll be good to go with the S4 if that is your own worry… I have owned both .

Only pools working properly for me are Btcguild and Ghash.io. Even then, Ghash.io sometimes needs the S4 to be powered down and restarted to work properly. Use Btcguild until firmware fixes these issues.