Topic: ANTMINER S2 Discussion and Support Thread - page 24. (Read 355797 times)

I don't know if this sound meter app is accurate but it says 69db. I took 4x 120mm silents out of my BFLs and popped them ontop to test the theory out. So currently I've got the 4x 87CFM fans blowing air into the antminer from the sides. Then 4x 55CFM fans sucking the hot hair out and blowing it upwards. It looks like the temps have dropped to 55c except for 1 card which is at 59c (probaby the one on the end not getting much coverage by the 120mm fan). So I would venture to guess 4x more 87CFM fans should do the trick as I think I read ~56-57c was the standard temperature with stock fans.

what is your dB reading currently at 1m distance? I have one fan at slow rpm blowing into the miner, nothing to suck air out and it is at 62-63dB, which is quiet.

I'm trying to convert my antminer s2 so that it is mostly silent. I've already purchased 4 new silent fans (http://www.newegg.com/Product/Product.aspx?Item=N82E16835242011) and installed them however the CFM just isn't good enough and the antminer temp is getting up to 71c. My next plan is to buy 4 more 140mm fans to place on top of the boards with the case off. I'm thinking another 4 of the same or maybe upgrading a tad and getting (http://www.frozencpu.com/products/13819/fan-901/Akasa_140mm_x_25mm_VIPER_PWM_Fan_w_Hydro_Dynamic_Bearings_AK-FN063.html?tl=g36c435s1104&id=kepe2EsK#blank) Do you think 25dba is going to be too loud or should I stick with the 18dba 87CFM fans?

Second question is going to be fan direction/placement for optimal airflow. Should I configure it so the 4 side fans all blow air into the antminer and the 4 on top to suck air out and blow it upwards. Or should I use the 4 ontop to blow air down into the antminer and the 4 on the sides to suck the hot air out?

I love the picture of the computers on the truck....   Made me laugh.  As I am experiencing major problems with me S2's with little not no support from Bitmaintech!

HA HA HA     

with these PSUs, u can power up maybe 5 S2 

 Batch 5 S2 PSU's have been delivered guys.

not now, they're focusing on these S3 things
something about password in S2...
u have to wait for S2 new firmware

Hi Bitmain,

Is there a way to change the web-interface password using ssh?

~ Luc

better wait for S3 batch 4
its like a gambling if buying this miner at such price

The price has really come down from what it was but its still really high! As said before we don't see ROI with this kind of hardware and BTC price :-/

How we can upgraded??? What chips 28nm

wow, no need to ask for "S4" while ur S3 hasnt arrived at ur place
be patient bro...dont rush these Bitmain guys 

Not that this should come as a surprise, but I asked Bitmain about the launch date of the S4 and they wouldn't give any details... but they did refer to it as the "S4" - so at least we know we're calling it by the right name  

Also, $1499 $1489 now on Amazon

Agree, seems like s3 is a better deal right now. Will wait for s4 in the meantime

It's not profitable anymore. Even with price of 1640$ it's not worth it at the prices of bitcoin less than 700$.

Is there anyway to change the interface password by ssh?

buy the S3 sir...
if u still want this S2, buy at $1000 or you'll be having a tough time to ROI

Just wondering if its worth buying one of these? With the current difficulty it seems the ROI would take a pretty long time before making any real profit.

Are you using the stock PSU? If so that is most likely the cause....getting 1000+W out of a 1000W PSU...well.....whose bright idea was that to begin with   all I can think is such a mass amount of potential in a box with a few gears missing...PSU is the weakest link...but on that note I can run 9 boards at 215 with no reboots using the DIY S2 kit and stock PSU...what great fun   torture for the PSU at any rate....never mind the efficiency which went out the window at 85% MAX
as for what working well with one not working well on the other...tell me about it   I think that is largely due to the random wondrous thermal grease application which boggles the mind...Im sure there was some kind of connect the dot game at the plant using thermal grease..some boards I have even have some autographs on them instead of grease I assume from the winners  ...I wonder if they were so good they didn't need any...why else would they be signed  
Regarding some miners resetting to default config...well I had 3 SD cards which did that...I snapped the first one after it failed to save the config for the time after reflashing/imaging/ plug and mine   that I chalked up to all 3 having a smaller amount of available space which I found out after trying to re-image them with working SD card images from the other 4GB junk ...they didn't fit on the "faulty" cards for some reason...even the SD cards are different between machines...those are in the bin anyways class 4 cards belong there in 2014 in my opinion...4MB/s wow watch out...I replaced all SD cards with Kingston Class 10 microSD which are more than double the speed and work just great...if you can find smaller class 10 than 8GB go for it but for the $7 I didn't care...
Last of all...don't mess with any of this unless you know what you are doing...I wont take responsibility for anything that happens...unless its a good thing then a thank you will do  

i can order S3 only :p
hehehe