Topic: S3+ (BM1382) Overclocking with voltage setting - page 5. (Read 28804 times)

So if I follow your chart right I can do ~450 GH/s at 240 watts with this? What firmware version do I need to be running?

IMHO the voltage settings make no difference with the S3+ ( change on GUI without modifying config files )

I have tried alot from 0500 (which is too low für the asic to run) up to 0800. On my tests it make no difference on GH/s or power-consumption or HW-Err.

Only setting of Frequency makes a differnce.

Freq   Volt   Watt   Temp A B   Fan   GH/s   HW   W/GH
225   0,77   380   38   36   1600   449   0   0,846325167
250   0,77   440   39   36   1800   505   0   0,871287129
250   0,72   440   39   36   1800   505   0   0,871287129
200   0,72   330   37   25   1500   408   0   0,808823529
100   0,72   161   36   35   1000   210   0   0,766666667
100   0,50   161   34   33   1000   208   0   0,774038462


Always with power off/on and running for 1 hr.

 

I have neither empirical evidence nor electrical engineering know-how about what I am about to state below, but believe it to be true.

If you clock your S3+ to freq 250 with a voltage setting of 0750 then the total draw the chips would require would be approximately 294 watts. Now here comes the part I am not certain on, i.e I think you can achieve the stated hashrate of  504 Gh/s running it off a 400+ watt PSU, and that is where you would get the reduction in power draw at the wall (and not too dissimilar to the S5 9v PSU undervolt!).

I am also intrigued as to how the latest beta firmware reflects on the power draw when a voltage setting is applied as it seems to handle better than the previous releases, but again, not having a killawat meter bars me from gathering any data on that.

This is the elephant in the room.....  it DOES NOT change the wattage at the wall..  this alone convinced me to make an sp20 purchase.  I have one S5 coming...I will test the S5. if it acts similar to the S3.  I will be replacing everything with the sp20 (about 70th)

Make voltage changes
Power cycle psu
System-reboot from web interface
It keeps x's and hwe from popping up

i think my batch 5 miners dont have the dc/dc that changes voltage..

ive tried every combination of volts and no matter what i put in, it doesnt get any better then if i leave it blank, sometimes it gets worse..


i guess 237.5 @ 479 is the best i can do.

Does anybody see the actual voltage changing on voltmeter for S3/S3+/C1 ?

Thank you.

Like I said above, go to the S3 discussion thread and ask one of the support people, via PM and including your email, for the firmware and they'll send it to you via email. Dogie also posted a link to it here https://bitcointalksearch.org/topic/m.9895096, though I'd get one from support direct.

Pm me link to beta firmware im having trouble finding it their email techs dont have access to it

these miners sure are picky on the volts?

i been running at 237, gives me 479ghs with around .002% hwe.. one more then the other but not higher then .002%

i switched them up to 245 and leave the volts blank, they will run at 483ghs.. but the hwe goes up to .01%+ and it just takes a few minutes to get 100s of errors..

i set the volts to 0740, they run at 499 or so.. but the hwe goes up, .01%+
i set the volts to 0745, then they run at 460 or so and the hwe stays 0%.. think this is over volting them?
i set the volts to 0735, i think one of these likes this, so far im at 489ghs but 0% hwe. its only been a few mins tho so i dunno.. the other one 490ghs and 100s of hwe at .03% in 5 min..


i tried the bad one at 0730 and 0725 and no good, .03%+ hwe.

so maybe that one wont go higher then 237..

edit, after a few min the ghs dropped down to under 479, which is what i was getting at 237.. so yeah..

maybe i need that beta bios that is being passed around.


edit..
so to just check things out, i set both of my miners to 225, which they run 100% at 453 with less then .0001% hwe..
i set one with the volts 0720 and one with it blank..

ill see if there is a difference..

edit, after 5 hours no difference.. i dunno.

for now i put it on 237 and 0735. those should be the correct numbers per the chart on the first page. ill see what happens.

I usually power cycle after I've decided to run a frequency / voltage setting for a long(er) stint.

do i have to power off and on, or does hitting save and apply enough?

im trying 243 @ 0740

If you are trying to run at 243, then start setting your voltage setting from 0720 towards 0750. (look at the 3rd table in the OP of tis thread for example settings at certain freqs)

I'd also be tempted to run at freq 250 voltage 0750 (and incrementing depending on result) in your case.

i been running my s3s at 237.
they are pretty steady at 479.

except one has twice as much hwe at that speed then the other.. .002 vs .001

i was thinking maybe a slight volt tweak would help it..

plus i want to try to get it to 243. but when i set them to 243 they dont get much faster and the hwe goes way up.

Not all S3's support voltage settings (hardware wise), and please don't ask me which ones do as even bitmain can't tell.

On the other hand, set a voltage to its corresponding frequency (0750 is for freq 250 and you can also try freq 262.5); You also have to let it run for a while to tell whether that is the "sweet spot" for your S3. If you get too many HW errors, say in the first hour, then that is not a good voltage setting.

NOTE: I'd be patient for another few days /weeks until bitmain have released the new firmware which (seems) to auto set the voltage depending on what frequency you select.

some reason on my S3s if i type a number in the volts field the hash goes way down.. i dont know what im doing wrong.

ive try 0750, all the way to 0795.

Go to the S3 Discussion and Support thread, find one of the BITMAIN_***** people and send them a PM asking to test the new firmware. Don't forget to add your email address to the PM and they'll send it to you by email, no idea when it is due for release though.

Thanks for the reply.. will said firmware be publicly avail soon? or now? would love to retest the wattage at the wall issue.

I do not have a tool to measure the pull at the wall, but if your tests showed no change, I have no reason to doubt it.

OBITER DICTA: It seems the new firmware that bitmain are testing (I got a copy from bitmain earlier today and you can ask to be sent a copy), handles voltage settings well using the default value of 0000 (I suppose that signifies auto select the voltage). I flashed one of my S3's with the firmware and in the first hour that I was able to observe, it seemed to be handling well. I will not be able to check on the rig as I am away for a couple of days, but will be able to on the 26th or 27th.

Could you please post how many watts at the wall this is pulling...  when I did my tests of voltages I could not get the wattage at the wall to change by changing the volts..