New one fan S7

[abeandund]

is it acceptable to run the s7 at 71 C?  I am trying to sift through the main s7 thread but it is over 400 pages and is going take some time, so please excuse my possibly already asked questions.  I'm not completely through the s5 threads and though different miners it seems concesus to keep under 65.

[sloopy]

Has anyone else recorded any temperature differences between the F1 and F2 batches?
Or, has anyone ran one hard, overclocked, and checked heatsink material and bonding?

Southern Mid-West summers are brutal. Even though I will be experimenting with a swamp cooler this year, I cannot handle something which I know is going to run 10 degrees hotter.

[KeezAZA]

I have read in this very thread that they can run up to 80C. Not recommended for long periods.
Mined did run into the low 80s for a few hours. i quickly dropped it down from 700mhz to 650mhz. that dropped the temps to 70C.
On Average I am running them at 64-68C @ 80% fan speed.
Weekends they run @ 64C @ 90% fan speed.

[abeandund]

As Midwesterners we are moving into AC season so we should be able to correlate the season transition as far as s7 temps vs. ambient temp.  I have an s5 running with a box fan blowing air at the miner and pushing most of heat out of room where there is open window exchanging ambient air in/out. with outside temps 75-80 F the s5 temps are 49 -53 C.  I also have an s3+ OC running along side with temps 38 - 42 C.  What I am saying is the s7 f1 should be similar to stock s5 with my setup moving into AC season I am wondering what to temps to expect from a s7 f1 with ambient temps maintained 75-80 F.  With the s5 we strove to keep happy under 65, and I'm well under that so if I get an s7 f1 and achieve under 70 is that baseline to seek?

[abeandund]

or should I look at also buying the second fan option from bitmain and either wait 90 days before voiding warranty in the meantime underclock to maintain safe temps?

[KeezAZA]

under clock it to 550 and set fan to 90% and see the temps.
Push up the freq once you are comfortable with the temps.

My S5 is under clocked to just under 995Gh @ 56C in the same room as the S7-F1

[abeandund]

Thanks KeezAZA, that is exactly the comparison I was looking to hear.    I am now confident with ability to work way up to stock settings I also can keep temps in comfortable range. I think I have my bases covered, power, temp control next, I'll have to find a couplon then order from bitmain.  That puts me at ease, I think a s7 f1 will be a good fit and finally upgrade to a new machine.  Thanks again for info.

[KeezAZA]

Thanks KeezAZA, that is exactly the comparison I was looking to hear.    I am now confident with ability to work way up to stock settings I also can keep temps in comfortable range. I think I have my bases covered, power, temp control next, I'll have to find a couplon then order from bitmain.  That puts me at ease, I think a s7 f1 will be a good fit and finally upgrade to a new machine.  Thanks again for info.

You welcome.
Happy mining!

[abeandund]

  found a coupon and ordered the one fan s7.  I was going to get the back up fan as well as second fan and back plate, but shipping was ridiculous for the add on.  I'll post some temps once it comes in for the benefit for fellow Midwestern hobby miners.

[abeandund]

I've read in the main thread about orders that don't show up correctly, but as long as it's confirmed in the block chain everything is good to go?  I ordered on the 4th, now it's the 11th just wondering if it is typical for orders to take longer than the "ships within 5 days" to ever show shipped.  My status has showed, since the order was confirmed, as paid, unshipped, expired.  now it shows paid unshipped valid.  That is the extent of content on bitmains order page other than general information such as order id, pay address, price time created.  Im just wondering when I might expect this batch 16 miner to arrive.  It does suck that the batch 17 has 2 fans, maybe i'll get a coupon to order the upgrade, if it does become available. 

[abeandund]

finally, received tracking number and unit has been shipped.

[JaredKaragen]

oddly this current sale run has two fans again....

[fanatic26]

oddly this current sale run has two fans again....

Thats not a bad thing. From personal experience the 1 fan units have more issues than the 2 fan units by far. Out of 36 test units we have had 3 show bad chips and one go into nuclear meltdown in the first two weeks of having them. Meanwhile the 2 fan S7s i run just sit in their corner and hash away happily.

[JaredKaragen]

I personally like a fan on the exhaust side because I can duct it out to a roof vent.....  It would be my preferrable position, but forming pressure inside the box instead of taking pressure away; is more efficient for cooling (air density rules IMHO)

[abeandund]

Up and running.  Out of the box, factory settings (700) my temps are 57,59,60 fan is 5640 rpm.  4689.35 gh/s It has been running for 30 minutes, and have had 14 hw errors (.0007).  Pool difficulty just went to 32.8 K from 16.4 K.  I don't know what difficulty is good setting to run at pool side, but i'll jump around over the weekend and find which one it is happiest? 

I set this one fan S7 just like my S5 with a small box fan blowing air directly at the front of miner about a foot away.  The miner is running in a closed off garage, but open to the main house.  Out side temp is 77 F with an ambient temp of 87 F in the garage.  House is 78 F ambient and fan is blowing the cooler air at front of S7.

I don't have a meter to measure db, but it sounds at least as loud as my S5.  I will look into flexible ducting to sound proof.

[JaredKaragen]

Up and running.  Out of the box, factory settings (700) my temps are 57,59,60 fan is 5640 rpm.  4689.35 gh/s It has been running for 30 minutes, and have had 14 hw errors (.0007).  Pool difficulty just went to 32.8 K from 16.4 K.  I don't know what difficulty is good setting to run at pool side, but i'll jump around over the weekend and find which one it is happiest? 

I set this one fan S7 just like my S5 with a small box fan blowing air directly at the front of miner about a foot away.  The miner is running in a closed off garage, but open to the main house.  Out side temp is 77 F with an ambient temp of 87 F in the garage.  House is 78 F ambient and fan is blowing the cooler air at front of S7.

I don't have a meter to measure db, but it sounds at least as loud as my S5.  I will look into flexible ducting to sound proof.

if you can get a kill-a-watt meter on the miner, it would be nice to compare wattage draw to the two fan models.   I doubt much difference, but worth a look.

[abeandund]

I am using 3 750 gold thermaltakes, on two circuits, but I only have one kilo-watt meter.  The outlet my meter is in now has two PSU's each powering 1 hash board and reading 877 so two of the 3 boards are  438.5 per unit at the wall.  I assume the third is drawing a bit more since it is also powering the control board, i'll take that measurement tomorrow.  The form letter packaged inside with the miner said to expect 440 per board so I am using just north of 1300 watts at the wall.

Just under 6 hours temps are about same, 58, 60,61.  139 HW errors (.0006)  4709.82 gh/s (700 clock) diff 16.4 K

[abeandund]

I let the miner run for 24 hrs before powering down and switching over the kilo-watt meter.  Right now the 3rd psu that powers the first hash board and controller board is pullin 462 at the wall.  My S7 F1 appears to be using 1339 watts at the wall with 3 750 gold thermaltakes.

Temperatures have went down with ambient temps directly above machine of 80 F, I have 55, 57, 58 with fan @ 5280.  Nothing has changed other than a cooler day so inside temps of garage didn't climb.  The sound level I think is much better and even though my temps appear in the good, I will probably down clock next and try to find that happy place. 

Oh, the longer the machine ran, the better the gh/s got.  Before reboot and changing meter I was up to 4715 gh/s (avg) @ 700 with .0006 error %

[dance191]

Does anyone know the difference between the "1 fan" and "2 fans" firmware that you can download from their site?  It looks like you can just put a second fan on the 1 fan model, it spins at the right rpm. 

[abeandund]

I believe the one fan firmware only applies to batch 16.  If I am not mistaken, the 2 fan firmware can be used for all other batches, but specifically for those that choose to add the second fan to batch 16.