micro sd for ant miner s7

[popovic]

well my s7 was working fine without its micro sd memory but now having issues tryint to start it again after i turned it off... the odd thing is that it works fine when i conect to the io board 2 of the 3 hashing cards... not having the sd memory affects in any way? or maybe its because the io board have issues or is not working properly and need to be replaced?

help please

[VRobb]

First question for almost all S7 related strangeness: What PSU are you using?

[philipma1957]

the microsdcard is a none issue.

also do not do firmware leave it the fuck alone.


your problem is bad psu or bad board


connect  boards 1+2 test  if they work
connect boards  1+3 test if they work
connect boards 2+3  test if they work

all boards are good so then


connect boards 1+2+3 if it does not work bad psu



what is the psu and what is the batch number 8-15 or 1-7

8-15 need more power then 1-7

if your psu is lacking the balls to do its job
try setting the freq down from 700 to 625 is it is batch 9-15
or from freq 600 to freq 525 if it is batch  1-7

lastly set the fans at 60%  and see if rpms read about 3800 rom

[popovic]

il try doing the freq thing... my psu is a bitmain 1600w i thought the io board was the one causing the issue... so if i nerf the freq to 600 or less and it works, then it means the psu is bad? not the io board?

i did all tests ur telling me about testing the hashing cards they are all fine and my s7 is batch 8. ty for the help lets see if it fix the issue

[popovic]

the freq is now 600 (from 700 cuz 625 didnt work)... working fine now hashing at 4 TH/S thou

[VRobb]

It would seem that there's something amiss with your PSU or possibly connector(s) which at higher setting/wattage you get problems.

The trick now is to figure out exactly what is the culprit. Or not, 4TH/s isn't that bad, and it'll be running less power so less $$ on your electric bill.  I got mine UC'd to 625-631 just for the $$ drop on the bill, too.