Why would it do any of that? I'm not playing with the board voltage. Somebody else did that before I bought this used equipment by soldering in some additional silicon. XD
The boards I have now are running within 2C of each other, though, so I suspect the voltage is within spec across them. I only lose 1 chip of 45 on board #2 above 725mhz, and I've run this box all the way up to 775mhz / 5.2TH/s on a particularly cold night with high mains voltage. I'm limited to 15A on this circuit / plug.
I'll soon have a 240v solution and 2x miners running. I'm also working on an ultra-efficient cooling system that should allow me to attain profitability at $0.10/kWh even with these S7's.
As an side, the cooling system should be less electrically efficient than underclocking and running outside air, more efficient than a traditional computer room air conditioner (CRAC), and it will be far more portable and space-efficient than both. It should also severely reduce interior room noise at full operating power.
I'm running 700mhz (stock freq) at ~48C right now. 12.5A.
Topic: Bitmain Antminer S7 Overclock w/ Data (Read 165 times)
Please setup a 24/7 camera that is recording so we can see the moment where the machine blows up and starts shooting fireballs out the back.
Overclocking bitmain gear is extremely stupid and I hope this doesnt give anyone else ideas.
Overclocking bitmain gear is extremely stupid and I hope this doesnt give anyone else ideas.
Hello. This is to catalog my overclock for future interested parties.
Unit: Bitmain Antminer S7
Board Versions: ? (To Come)
Date format is xYYMMDD.HHMM
Location is Alabama, USA.
- - - - - - - - - - - - - - - - - - - - - - - - - -
Date x180124.0400
Type: Bitmain Antminer S7
Cooling: Ambient air
Run Time: 1:15
Outside Temp C: 0
Chip Temp C: 48,47,48
Freq: 775
Dev Hash 5s: 5.058
Pool Hash Scr: 5.223
Pool Hash 1hr: 5.316
DIFF1: 5232395
DIFFA: 5572052
DIFFR: 41085
HW: 2856
Error %: 0.0546
Volts: 117.5
Amps: 14.04
Watts: 1650
Fan %: 30
Fan 1: 3000
Fan 2: 2640
- - - - - - - - - - - - - - - - - - - - - - - - - -
Date x180123.0245
Outside Temp: 5C
Chip Temp (C): 42,46,46
Chip Qty (#): 45,44,45
Freq: 768
Hash (TH): 5.00
Error: 0.03%
Volts: 115.5
Amps: 14.75
Watts: 1703
Fan %: 100%
Fan 1: 4440
Fan 2: 4200
Unit: Bitmain Antminer S7
Board Versions: ? (To Come)
Date format is xYYMMDD.HHMM
Location is Alabama, USA.
- - - - - - - - - - - - - - - - - - - - - - - - - -
Date x180124.0400
Type: Bitmain Antminer S7
Cooling: Ambient air
Run Time: 1:15
Outside Temp C: 0
Chip Temp C: 48,47,48
Freq: 775
Dev Hash 5s: 5.058
Pool Hash Scr: 5.223
Pool Hash 1hr: 5.316
DIFF1: 5232395
DIFFA: 5572052
DIFFR: 41085
HW: 2856
Error %: 0.0546
Volts: 117.5
Amps: 14.04
Watts: 1650
Fan %: 30
Fan 1: 3000
Fan 2: 2640
- - - - - - - - - - - - - - - - - - - - - - - - - -
Date x180123.0245
Outside Temp: 5C
Chip Temp (C): 42,46,46
Chip Qty (#): 45,44,45
Freq: 768
Hash (TH): 5.00
Error: 0.03%
Volts: 115.5
Amps: 14.75
Watts: 1703
Fan %: 100%
Fan 1: 4440
Fan 2: 4200
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