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Author Topic: Hacking the S7 - improving efficiency through minor hardware manipulation  (Read 25488 times)
NotFuzzyWarm
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June 29, 2018, 02:26:47 PM
 #281

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Any suggestions on a PSU, preferably a quieter one than the 1300w server PSU?
I've been becoming rather fond of Bitmain's APW3++ series. They are rated up to 1,200W @ 110v (1,600W @ 240v) and are quiet even when moderately loaded. Their one quirk is that if it ever shuts down from overload it takes several minutes before it will restart despite being only slightly warm .

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June 29, 2018, 02:30:14 PM
 #282

I do not have the equipment (or experience for comfort) to do this, but I do have an S7 (45 asic) gathering dust.

Is anyone out there offering this (re)programming as a paid service?

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June 29, 2018, 02:56:38 PM
 #283

I've been becoming rather fond of Bitmain's APW3++ series. They are rated up to 1,200W @ 110v (1,600W @ 240v) and are quiet even when moderately loaded. Their one quirk is that if it ever shuts down from overload it takes several minutes before it will restart despite being only slightly warm .

Would i need 1300w since i have lowered the mv with thee hex files?
I figured 800w max for ramp up then it would settle to 630-640w.
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June 29, 2018, 03:07:59 PM
 #284

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Would i need 1300w since i have lowered the mv with thee hex files?
Maybe for a short time until the s7's throttle down.
Good thing is, the APW3++ is seriously de-rated. I've ran a few at 1,350-1,400w fed from 110v for several days with no issues other than the fans running at full speed. Still quieter than the hair dryer like sound from HP DP1200w supplies.

Several companies distribute the APW's, I use Blockforge.com in the US

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June 29, 2018, 06:20:32 PM
 #285

Maybe for a short time until the s7's throttle down.
Good thing is, the APW3++ is seriously de-rated. I've ran a few at 1,350-1,400w fed from 110v for several days with no issues other than the fans running at full speed. Still quieter than the hair dryer like sound from HP DP1200w supplies.

Several companies distribute the APW's, I use Blockforge.com in the US

Thank you, will look into them.
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July 01, 2018, 03:33:20 PM
 #286

I let each board run solo on my S7 for a day or so each. I fired up the third board for a solo run last night and it immediately showed all 3 boards with "oooo"s and 48 chips.

I switch the ribbon cable out for one of the other boards - same result

I re-flashed it with different hex files, starting from 620 up to 690 - same result

Changed power supply from apw3++ 1300 to an EVGA 750 - same result

I have run out of ideas at this point and would greatly appreciate the help.


Thank you


edit: added additional info
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July 12, 2018, 02:44:25 PM
 #287

Sidehack, or others... anyone offer (or willing to do) this as a paid service, for those of us that don't have the knowledge/comfort to do so ourselves?
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July 12, 2018, 03:34:18 PM
 #288

Sidehack, or others... anyone offer (or willing to do) this as a paid service, for those of us that don't have the knowledge/comfort to do so ourselves?

Its really not worth the time or effort to ship it, have it done, send it back and all that nonsense. Plus when you dont like how it runs and you start to complain, nobody wants to deal with that.

Just man up and do it yourself, it costs almost nothing for a PIC programmer and then like 15 minutes of your time to actually do it.
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July 12, 2018, 04:50:53 PM
 #289

It's true. All the software is free and you can get a PICKit clone for like $20.

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July 24, 2018, 07:42:02 PM
 #290

It's true. All the software is free and you can get a PICKit clone for like $20.

I have one on order, looks like it'll arrive Friday so hoping that will be my fun for the weekend.

Had another S7 hashboard die, just won't show all the asics...so the last two boards I have are running in one machine. If I can update both of those, hoping to get them as low as 2.5Th at 600W...in which case I should actually be able to run it in the house!
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July 24, 2018, 07:57:06 PM
 #291

Depending on the condition of the chips and resulting speed/voltage the miner will be stable at, with 3 boards mine were running at ~ 3.5 to 3.9THs with fans at 20-25%, power draw was around 750W. Result is more than quiet enough for the office or home.

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
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NotFuzzyWarm
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July 25, 2018, 03:59:37 PM
 #292

how much energy does the miner consume? Huh
...
Perhaps try READING the post right above yours?

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
How a miner mfgr SHOULD operate: HaggsFIN trip to Canaan My info useful? Donations welcome! 1Fuzzyk398kDWVjuC5qPX5v6CjSkvbgAbd
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adaseb
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July 31, 2018, 07:50:52 AM
 #293

Depending on the condition of the chips and resulting speed/voltage the miner will be stable at, with 3 boards mine were running at ~ 3.5 to 3.9THs with fans at 20-25%, power draw was around 750W. Result is more than quiet enough for the office or home.

Really surprised you got it to be quiet enough for an office with a 750W power draw.

I remember with my old Antminer S3, to get it quiet enough for a bedroom I had to undervolt and underclock so it pulled 300Watts and I was able to get away with using 2 computer case fans (from a KnCMiner Jupiter actually).

With a 750W power draw, I don't think it would be possible to make it that quiet.

But I guess everybody has different noise levels and they are all relative.

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NotFuzzyWarm
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July 31, 2018, 02:21:50 PM
 #294

Quote
With a 750W power draw, I don't think it would be possible to make it that quiet.
But I guess everybody has different noise levels and they are all relative.
The UV/UC s7's get very quiet. Given 70F ambient it is quieter than the central AC. Still audible at a distance but not distracting in the least.

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
How a miner mfgr SHOULD operate: HaggsFIN trip to Canaan My info useful? Donations welcome! 1Fuzzyk398kDWVjuC5qPX5v6CjSkvbgAbd
-Support Sidehacks miner development. Donations to:   1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr
adaseb
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August 01, 2018, 03:34:21 PM
 #295

Quote
With a 750W power draw, I don't think it would be possible to make it that quiet.
But I guess everybody has different noise levels and they are all relative.
The UV/UC s7's get very quiet. Given 70F ambient it is quieter than the central AC. Still audible at a distance but not distracting in the least.

I guess the difference can be the hashboards.

If I recall the S3 hashboard had exposed chips, while the S7 had individual heatsinks on each chip.

So I guess the S7 needed a little less airflow since the heatsinks did a good job of absorbing most of the heat, while the S3 needed much more air.

Really temped to pick up a couple of these and just mod them for old time sakes. Been a while since I've had an Antminer and they are dirt cheap right now.

Maybe point it in ckpool solo and hope it hits a block one day.

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