Title: Bitmain Antminer S7 Overclock w/ Data Post by: gta3uzi on January 23, 2018, 08:56:27 AM 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 Title: Re: Bitmain Antminer S7 Overclock w/ Data Post by: fanatic26 on January 23, 2018, 06:11:30 PM 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. Title: Re: Bitmain Antminer S7 Overclock w/ Data Post by: gta3uzi on January 24, 2018, 07:52:41 AM 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. |