Bitmain New Miner S7-LN 2.7T @697W discussion (Not official)

[lovenlifelarge]

ordered mine friday night, Lets see how long it takes to get to Sydney Australia..

[1713414590]

1713414590

[1713414590]

1713414590

[1713414590]

1713414590

[Kapz786]

ordered mine friday night, Lets see how long it takes to get to Sydney Australia..

Keep us updated-  thinking about ordering one in Perth

[generalt]

I received mine last week and I have to say I really like that these are no where near as loud as the S7.  For that reason alone I'm thinking of ordering more after the halving.

[animalroam]

This miner doesn't seem easy to get an ROI on considering the halving.

[generalt]

This miner doesn't seem easy to get an ROI on considering the halving.

Yes I'm hoping that they drop the price of this soon.  None of the Bitmain miners that are for sale seem to have a good chance at ROI

[squall1066]

Anyone underclocked one of these?

Why, I hear you say... A mate has bought one to run in his free power studio, but it is still a touch loud at night, any reports of lowest frequency is stable?

They come 600Mhz stock, and can select as low as 100Mhz, but not trying that in case of bricking it, lol

[sidehack]

I've done extensive testing on underclocking and undervolting. Got mine to run 2TH at 20% fan and about 415W. Operating at low frequency won't really cause instability; the problems happen when you choose a frequency that is too high for the voltage (or a voltage too low for chips to operate at any frequency, since all semiconductors have a minimum operating voltage).

[squall1066]

I've done extensive testing on underclocking and undervolting. Got mine to run 2TH at 20% fan and about 415W. Operating at low frequency won't really cause instability; the problems happen when you choose a frequency that is too high for the voltage (or a voltage too low for chips to operate at any frequency, since all semiconductors have a minimum operating voltage).

awesome, that sounds the ticket, do you happen to remember the frequency you used please?

[philipma1957]

I've done extensive testing on underclocking and undervolting. Got mine to run 2TH at 20% fan and about 415W. Operating at low frequency won't really cause instability; the problems happen when you choose a frequency that is too high for the voltage (or a voltage too low for chips to operate at any frequency, since all semiconductors have a minimum operating voltage).

awesome, that sounds the ticket, do you happen to remember the frequency you used please?

he has a chart in his thread .  let me look for it.

link for you

https://bitcointalk.org/index.php?topic=1504228.msg15257433#msg15257433

[sidehack]

The thread's linked in my signature. I'll be updating that chart with more values and stuff, and should have a hex file package and flashing instructions posted today or tomorrow. I'm kinda behind on that.

[squall1066]

I've done extensive testing on underclocking and undervolting. Got mine to run 2TH at 20% fan and about 415W. Operating at low frequency won't really cause instability; the problems happen when you choose a frequency that is too high for the voltage (or a voltage too low for chips to operate at any frequency, since all semiconductors have a minimum operating voltage).

awesome, that sounds the ticket, do you happen to remember the frequency you used please?

he has a chart in his thread .  let me look for it.

link for you

https://bitcointalk.org/index.php?topic=1504228.msg15257433#msg15257433

thanks 

The thread's linked in my signature. I'll be updating that chart with more values and stuff, and should have a hex file package and flashing instructions posted today or tomorrow. I'm kinda behind on that.

cool, NP, I got what I needed from the info there, thanks alot for your work on the thread 

[hurricandave]

The thread's linked in my signature. I'll be updating that chart with more values and stuff, and should have a hex file package and flashing instructions posted today or tomorrow. I'm kinda behind on that.

  My browser only displays three lines of anybody's sig. Not sure why. Anyhow, the chart doesn't show temp (@PCB) and I can live with the fans volume db the way that it is. But, I'm operating in a small room that has an undersized A/C system, this unit seems to avg 49C. I'm in South Texas and its gettin' hot in here! Have you seen any reduction in unit temps at the lower frequency's?  

[sidehack]

When I noted I could run 50C boards in a 73F ambient at 20% fan and 2TH, I was at home and running the miner overnight about five feet from my head while sleeping. A lot of the tests have been at the shop, where the ambient has run between 90F and 100F for pretty much the entire time. I'm pushing it about as hard now as I ever have (710mV 775MHz for 1018W of draw) and I'm seeing 63/65 from about 90F ambient, fans 3120/3240

All the S7 hack links are in the first line of my sig - the thread and the group buy.

All things being equal, temperature should be proportional to total power dissipation. As your power input goes down, your heat output goes down. So yes, the thing will stay cooler at lower frequencies.

[hurricandave]

I haven't found any "Halt" or "Stop" buttons in the Luci, is it "safe" to just flip the PSU power switch off when it gets too hot in my room and I need the A/C to get a chance too catch up?

[sidehack]

I've been killing the miner by killing mains AC into the PSU. My meter box is wired with a switched outlet. I've power-cycled it probably 50 times and it's come back up every time.

[hurricandave]

I guess I kinda over worry about things, like heatsoak , from the sudden loss of fans while running heavy.

[Ecnad]

Ordered one last night and it's scheduled for delivery Monday! Pretty good service!

Came today as expected. Well packed in foam, all parts look brand-new. PS still had protective plastic on it.

Got it underclocked to 2.1Ghs to make it quiet and not so hot - though it was pretty quiet out of the box.

[Ethey]

ive tested the s7 today.

My Earnings

Total HashRate   24 Hours Earnings   24 Hours Maintenance
2101 GHS             ฿ 0.00313347            ฿ 0.00156631


i like it so far. if you interested where ive made the cloudmining pm me.
regards

[leowonderful]

Ordered one last night and it's scheduled for delivery Monday! Pretty good service!

Came today as expected. Well packed in foam, all parts look brand-new. PS still had protective plastic on it.

Got it underclocked to 2.1Ghs to make it quiet and not so hot - though it was pretty quiet out of the box.

2.1GH/S??? I think you stopped all the ASICS but one. Good to know that the PSU'S are at least in good shape - was worried they could just go to the trash dump and find some random 87+s and put them on their miners ready to ship. Hot is something else- was it running hot at default? There's probably no space for oc then.

[HagssFIN]

Ordered one last night and it's scheduled for delivery Monday! Pretty good service!

Came today as expected. Well packed in foam, all parts look brand-new. PS still had protective plastic on it.

Got it underclocked to 2.1Ghs to make it quiet and not so hot - though it was pretty quiet out of the box.

2.1GH/S??? I think you stopped all the ASICS but one. Good to know that the PSU'S are at least in good shape - was worried they could just go to the trash dump and find some random 87+s and put them on their miners ready to ship.

I guess he meant to say 2.1Th/s.