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[UfoRia]

I oc'ed my nine B1 s7's since day one, out of the nine B1's four can hold 675 with low error rates. The others I had to move them in increments until they would be stable, then when one would drop after a few days I would drop it a bit. With the temps rising I have had to adjust them occasionally, but I have been getting 46.5-48.3 from them since early October with no failures.

YMMV, so it's a simple matter of balancing temp/hw error rates and fiddling with them until they are balanced enough for your own tastes.


Ufo

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[firetreeactual]

Mahalo for the info. Seems to be working just fine at 725 w/.0001% HW and boards at 60/60/64. Going to leave it there, I think, through the day tomorrow when temps go up here, and monitor. If I see it's stable for a couple of days I'll then maybe try the Batch 16...but it already runs 60/62/65 w/.0003% HW without any tweaking.

[philipma1957]

Mahalo for the info. Seems to be working just fine at 725 w/.0001% HW and boards at 60/60/64. Going to leave it there, I think, through the day tomorrow when temps go up here, and monitor. If I see it's stable for a couple of days I'll then maybe try the Batch 16...but it already runs 60/62/65 w/.0003% HW without any tweaking.

those are solid numbers just watch for temps. as 64 is close to a safe max.

do you have fans set to 65%?

the newer batch has 1 fan so I would play with fan number's 

  see what 55% = in rpm
  see what 60% = in rpm
  see what 65% = in rpm


 go up to 80%   as I think 80% is the max fan speed  not 100% (I  don't have a 1 fan s-7 so I am not sure.)

BTW I spent time in the USN 5 years 1978 to 1983

[delicin33]

Mahalo for the info. Seems to be working just fine at 725 w/.0001% HW and boards at 60/60/64. Going to leave it there, I think, through the day tomorrow when temps go up here, and monitor. If I see it's stable for a couple of days I'll then maybe try the Batch 16...but it already runs 60/62/65 w/.0003% HW without any tweaking.

those are solid numbers just watch for temps. as 64 is close to a safe max.

do you have fans set to 65%?

the newer batch has 1 fan so I would play with fan number's  

  see what 55% = in rpm
  see what 60% = in rpm
  see what 65% = in rpm


 go up to 80%   as I think 80% is the max fan speed  not 100% (I  don't have a 1 fan s-7 so I am not sure.)

BTW I spent time in the USN 5 years 1978 to 1983

i have 3 s7 with 1 fan, my fan speed all set to max 100% = 5880 rpm, no choice the temp. here now is 35'C.

[kano]

Block. Yay under 100% Diff

[fvineyard]

I second the celebration of another block!

Yay!

[firetreeactual]

Yowza! 

[firetreeactual]

Mahalo for the info. Seems to be working just fine at 725 w/.0001% HW and boards at 60/60/64. Going to leave it there, I think, through the day tomorrow when temps go up here, and monitor. If I see it's stable for a couple of days I'll then maybe try the Batch 16...but it already runs 60/62/65 w/.0003% HW without any tweaking.

those are solid numbers just watch for temps. as 64 is close to a safe max.

do you have fans set to 65%?

the newer batch has 1 fan so I would play with fan number's  

  see what 55% = in rpm
  see what 60% = in rpm
  see what 65% = in rpm


 go up to 80%   as I think 80% is the max fan speed  not 100% (I  don't have a 1 fan s-7 so I am not sure.)

BTW I spent time in the USN 5 years 1978 to 1983

i have 3 s7 with 1 fan, my fan speed all set to max 100% = 5880 rpm, no choice the temp. here now is 35'C.

I haven't messed with the fan speed. So far I've got both the 2-fan B12 and the 1-fan B16 running at 725 w/good hw numbers. The B16 is, of course, running slightly warmer but the boards are at 60/62/65 steady on it; the B12 is running 59/59/62. However, each machine has its own insulated forced air corridor on the rack; they each get around 2,500 cfm straight through, one fan pushing and one sucking to the outside. Works pretty well.

[philipma1957]

Mahalo for the info. Seems to be working just fine at 725 w/.0001% HW and boards at 60/60/64. Going to leave it there, I think, through the day tomorrow when temps go up here, and monitor. If I see it's stable for a couple of days I'll then maybe try the Batch 16...but it already runs 60/62/65 w/.0003% HW without any tweaking.

those are solid numbers just watch for temps. as 64 is close to a safe max.

do you have fans set to 65%?

the newer batch has 1 fan so I would play with fan number's  

  see what 55% = in rpm
  see what 60% = in rpm
  see what 65% = in rpm


 go up to 80%   as I think 80% is the max fan speed  not 100% (I  don't have a 1 fan s-7 so I am not sure.)

BTW I spent time in the USN 5 years 1978 to 1983

i have 3 s7 with 1 fan, my fan speed all set to max 100% = 5880 rpm, no choice the temp. here now is 35'C.

set to 90%

then  tell us rpm  please at 90%

if rpm does drop to  5500 at 90% check the temps very carefully. 

basically fans at max rpm and fans at just under max rpm cool the same.

ie a fan running at 5500 rpm should do the same as a fan at 5880 rpm.

and that slight underclock makes fan last a lot longer.

It is a sweet spot all fans have it and it depends on the fan and the heat sink pattern.

If you can run the fan at 5500 rpm vs 5880 rpm and not overheat    you will save some money.

[UfoRia]

rand: don't block before random pool is initialized #33086

https://github.com/rust-lang/rust/pull/33086


Ufo

[delicin33]

i have 3 s7 with 1 fan, my fan speed all set to max 100% = 5880 rpm, no choice the temp. here now is 35'C.

set to 90%

then  tell us rpm  please at 90%

if rpm does drop to  5500 at 90% check the temps very carefully.  

basically fans at max rpm and fans at just under max rpm cool the same.

ie a fan running at 5500 rpm should do the same as a fan at 5880 rpm.

and that slight underclock makes fan last a lot longer.

It is a sweet spot all fans have it and it depends on the fan and the heat sink pattern.

If you can run the fan at 5500 rpm vs 5880 rpm and not overheat    you will save some money.

Tested one of the S7 with 90% fan speed =5280rpm , the temp rise 2'c on each board, 72,72,76.
when the fan run at max, the temp read 70,70,73.

room temp = 35'c

[hurricandave]

 411116   

[kano]

rand: don't block before random pool is initialized #33086

https://github.com/rust-lang/rust/pull/33086


Ufo

One of the few languages on the planet I've never touched and probably never will.

[usukan]

Interesting discussion - anybody care to comment on this?

I have always run my S7 B15's at Freq 750

Screenshot as an EG on Kano.is.......





What is a good HW number - and what is not?  Anything I can improve on here?

Ambient 20DegC and going down hard.
PSU Bitmain APW3-12-1600-B2
Power draw S7 plus PSU at board 1.47KW +/-

Thanks usukan




Interestingly they draw 1.47 KW at Freq 750

Dumb question, perhaps...but curious whether to try to bump the freq on my one Batch 12 S7 to maybe 725. The changes I made to the rack have both the units down by 10+C...and this one's running a consistent <=60C on all three boards. PSUs are 2KW split boxes (1KW ea) and up to it, I think.

Any educated guesses on what would happen? Worth the effort/risk? This box is off warranty.

Sure  eventually there is a freq that is too high  and the gear has more hw's  so the freq setting makes you lose money.


so

700 = .0001 hw  +  temps are low  bump to
706 = .0010 hw  temps go from 55 to 58 bump to
712 = .0025 hw temps go from 58 to 61 bump to
718 = .0050 hw temps go from 61 to 64 bump to
725 = .0250 hw hemps go from 64 to 67   too high drop to 718

this is a typical result.     your top end will be 712, 718, 725, 731,737  just move your freq   6 at  a time

Hey...cool. Well worded and perfect sense. I'm willing to risk a bit on this box as I have another (B16) spare. Mahalo! (Thx)  

EDIT: Did that...running essentially cool and normal at 725. Watching it closely, though. It may be different when the ambient goes up.

In my experience the determining factor in OC for antminers is HW and not temp.  This has been true for me going back to S1.  This assumes your PSU is more than up to whatever freq you set.  It's normal to see temps rise with higher freq but I always hit an unacceptable HW rate before I hit an unacceptable temp.

[hoosier_13]

Block, maybe we can get a nice run today!

[philipma1957]

Interesting discussion - anybody care to comment on this?

I have always run my S7 B15's at Freq 750

Screenshot as an EG on Kano.is.......





What is a good HW number - and what is not?  Anything I can improve on here?

Ambient 20DegC and going down hard.
PSU Bitmain APW3-12-1600-B2
Power draw S7 plus PSU at board 1.47KW +/-

Thanks usukan




Interestingly they draw 1.47 KW at Freq 750

That is a good set of numbers leave it be. the 1470 watts for  5055 is also pretty good about .29 watts a gh  the low chip machines do not go much lower then .30 watts

[clgrissom3]

Wow!  The Kano pool did a great job overnight with 3 blocks!  Love it! 

[zOU]

well it looks like my S7 is going to be delivered while I'll be away on a prolonged week-end and attending the ACDC concert...

Hopefully the delivery guy will ring me and the neighbours can take it.

Roll on sunday  so I can catch up as i turned off my 4xS5...

[sorry2xs]

"For Those About Rock We salute You" "just say no to autotune"  

[VRobb]

Don't you mean, "For those about to BLOCK, we salute you!"?     Nice seeing more than just 1 or 2 blocks confirming to yummy payout this morning, let's keep it up!