I'm assuming there is no issue with stacking S4s? Or would running them vertical (PSU intake side up) be preferable?
They have rack mount ears--they are designed to be mounted in a DC horizontally. 
Topic: ANTMINER S4 Discussion and Support Thread - page 92. (Read 301481 times)
I'm assuming there is no issue with stacking S4s? Or would running them vertical (PSU intake side up) be preferable?
Sounds like the PWM signals are reversed, ie high is low, low is high between the two fans. Either way it doesn't matter, you're temps are so low that its overcooled if anything.
Actually, I think it's more due to the Delta being rated at about 2 x watt and amp usage than the stock S4 fan.
Could be. Although why does it get slower and not just sit at its max current draw?
I think you may be right the amp draw is a big difference on the Delta.
So anyone out there find a replacement. Bitmain is going to leave me hanging seems as usual nowadays.
I use one called "Decobel 10th". Its free, but ad driven.
btw - my electrical room, where I put two GAW Black Widows some time ago, was running 75DB - and that was after I did some minor mods to change the pitch from a whine to a roar. Put the S4 in there last night. About 78DB in that room now.
btw - my electrical room, where I put two GAW Black Widows some time ago, was running 75DB - and that was after I did some minor mods to change the pitch from a whine to a roar. Put the S4 in there last night. About 78DB in that room now.
Is there any app to measure the DB of Antminer S4, S3in Android?
Defining LOUD: (measurements per my iPhone DB app)
Room with a number of computers, including (2) S3s: 60 DB - fairly quiet, no problems hearing people on the phone
Add (1) S4 running at 100MHs: 65 DB - Even with headphones, they better be talking pretty clearly
Running at stock 200MHs: 70 DB - Eh? What? Can't hear you.
Would be a great test for noise cancelling headphones with a directional mic.
Room with a number of computers, including (2) S3s: 60 DB - fairly quiet, no problems hearing people on the phone
Add (1) S4 running at 100MHs: 65 DB - Even with headphones, they better be talking pretty clearly
Running at stock 200MHs: 70 DB - Eh? What? Can't hear you.
Would be a great test for noise cancelling headphones with a directional mic.
LOL! Now that's funny
Edit: Oh.. and I have ear plugs on.. if that tells you something. I feel like I'm working in a data center.
Defining LOUD: (measurements per my iPhone DB app)
Room with a number of computers, including (2) S3s: 60 DB - fairly quiet, no problems hearing people on the phone
Add (1) S4 running at 100MHs: 65 DB - Even with headphones, they better be talking pretty clearly
Running at stock 200MHs: 70 DB - Eh? What? Can't hear you.
Would be a great test for noise cancelling headphones with a directional mic.
Room with a number of computers, including (2) S3s: 60 DB - fairly quiet, no problems hearing people on the phone
Add (1) S4 running at 100MHs: 65 DB - Even with headphones, they better be talking pretty clearly
Running at stock 200MHs: 70 DB - Eh? What? Can't hear you.
Would be a great test for noise cancelling headphones with a directional mic.
anyone know where to get fan. Bitmain refuses to send one unless I buy another unit (hostage).
I tried a Delta 120 mm 5500 RPM PWM TFC1212DE but it slows down as the others speed up??
Besides terrible customer service, this S4 is a major screw up. I havew other problems but one at a time. Right now I need to get a Fan.,
I tried a Delta 120 mm 5500 RPM PWM TFC1212DE but it slows down as the others speed up??
Besides terrible customer service, this S4 is a major screw up. I havew other problems but one at a time. Right now I need to get a Fan.,
If you ever find a compatible fan on the web, tell me. I looked for one on Amazon, eBay, and a lot of sites but it's not like it's obvious. I almost bought the Delta you're talking about... good thing I didn't.
My S4 doesn't want to start hashing if fan1 is not connected or not working. I have to unplug one of my S1's fans and plug it on the S4 to "boot" it, and then unplug it to plug it back on my S1. At first I could just spin the defect fan manually so that the S4 "thinks" it's working... but this trick stopped working. Now my S4 shows 0C on all boards... but it's hashing. Sometimes it shows 80C on one board and then stops hashing.
Not sure I understand the pattern.
And for compensation of the lost mining time...
Speaking of which, has anyone actually received compensation in the form of BTC from bitmain?
I did, last week! For one s4. It was a nice surprise.
How much BTC did you receive from them?
Has anyone else been compensated? I'm still waiting on mine.
It was something around 0.29 BTC for one s4. Tell me when you get yours.
Would it even be able to go to 0.725v or 0.73v 
Yes. Mine came default with 0.725v, I've tried 0.73v but chip temp shoot right up. Not suitable for me as I live in sunny Singapore where the seasons are, hot, hotter and hottest....
you cant achieve 0.8V. S4's hardware voltage top limit is 0.75V
The PSU that comes with it cannot support 0.75V. I tried. LOL. Hash board won't power up and you can literally hear the PSU trying... but running like a toy rabbit that is out of juice.
Would it even be able to go to 0.725v or 0.73v
Ah, that makes sense. See that URL, the power consumption goes up in a hurry - they would have had to put a lot larger PSU into it to handle it.
you cant achieve 0.8V. S4's hardware voltage top limit is 0.75V
The PSU that comes with it cannot support 0.75V. I tried. LOL. Hash board won't power up and you can literally hear the PSU trying... but running like a toy rabbit that is out of juice.
Ok - was just reading from the previous posted chip spec.
Wow!
http://puu.sh/cWvE3/072f5ed8f1.png
Stock is 0.72V, at 0.85V the chip is pulling more than double the power for a 22% increase in performance. Presuming the GH/s is based on clock rate, that would be:
0.75V at 222MH
0.80V at 244MH
and 0.85V presumably to add stability at the same 244MH, but at a 30% bump in power for that stability.
http://puu.sh/cWvE3/072f5ed8f1.png
Stock is 0.72V, at 0.85V the chip is pulling more than double the power for a 22% increase in performance. Presuming the GH/s is based on clock rate, that would be:
0.75V at 222MH
0.80V at 244MH
and 0.85V presumably to add stability at the same 244MH, but at a 30% bump in power for that stability.
you cant achieve 0.8V. S4's hardware voltage top limit is 0.75V
Wow!
http://puu.sh/cWvE3/072f5ed8f1.png
Stock is 0.72V, at 0.85V the chip is pulling more than double the power for a 22% increase in performance. Presuming the GH/s is based on clock rate, that would be:
0.75V at 222MH
0.80V at 244MH
and 0.85V presumably to add stability at the same 244MH, but at a 30% bump in power for that stability.
http://puu.sh/cWvE3/072f5ed8f1.png
Stock is 0.72V, at 0.85V the chip is pulling more than double the power for a 22% increase in performance. Presuming the GH/s is based on clock rate, that would be:
0.75V at 222MH
0.80V at 244MH
and 0.85V presumably to add stability at the same 244MH, but at a 30% bump in power for that stability.
Oh, and there is some kind of fomula if you read the chips specs.
https://bitmaintech.com/support.htm?pid=007201406210452505098o0UWHKV0661
https://bitmaintech.com/support.htm?pid=007201406210452505098o0UWHKV0661
Running on www.multicoinpool.org in their profit switching pool. So far, so good. The sysop is setting up a high diff queue as we speak to help optimize for S3s and S4s.
I had a similar experience when I played around with the frequency, but I assumed it was because I didn't change the voltage. Is there some kind of formula for how one should change the voltage if you change the freq? But yeah, I was able to mine at like 2.2 TH/s at 225 for a few hours, but the PSU couldn't handle it and it powered itself off, and I need a stable 24/7 operation, which 200 MHz seems to provide. Even the slightest adjustment seems to alter its stability, so I have basically decided to keep it at 200.
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Is your voltage set at 0.72 or 0.725. Mine came to me with 200mhz and 0.725. But as I'm in Singapore, we are running 220-240v so the A draw is much less. The X's comes one once in a while whether it's at 200 or 225. And if you're running this on multipool, good luck. You'll start getting Xs when they start switching pools. I was just playing around to see how it works. lol.
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Is your voltage set at 0.72 or 0.725. Mine came to me with 200mhz and 0.725. But as I'm in Singapore, we are running 220-240v so the A draw is much less. The X's comes one once in a while whether it's at 200 or 225. And if you're running this on multipool, good luck. You'll start getting Xs when they start switching pools. I was just playing around to see how it works. lol.
Yes... they are loud. I got a shock when I first turn it on.
Looks like most of us are running 225mhz with no problems. Should get you around 2.2t with that.
As for the firmware, look at the date, the latest is 16th oct and can be found at bitmain's site. https://bitmaintech.com/support.htm?pid=00720140930114518599JXGHWWD80660
Looks like most of us are running 225mhz with no problems. Should get you around 2.2t with that.
As for the firmware, look at the date, the latest is 16th oct and can be found at bitmain's site. https://bitmaintech.com/support.htm?pid=00720140930114518599JXGHWWD80660
Well, on mine, running at 225mhz for awhile eventually gave me some X's and O's and I had to hard reboot it manually, for a true 24/7 with no maintenance and power efficiency, i recommend running it at stock settings.
Has anyone done a power test comparing running 24/7 at 200mhz and running 24/7 at 225mhz? I wonder if it's even worth it with the power increase.
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