Hi all,
Finally got my Kill A Watt in the mail, so I tinkered around with overclocking my A3 to find an optimal frequency setting. Results below, I hope this helps!
Setup
Miner: Antminer A3 815GH/s
PSU: EVGA SuperNOVA 1600 G2
Circuit: 120v, 20A dedicated
Environment:Intake fan resting at open window, weather around 40F
Methodology
Pretty straightforward...
Results
*Default Frequency
Seems like the sweet spot is around 662-681. Not sure if I feel comfortable running at nearly 1% HW Error Rate, despite the increase in Hashrate. Comments/Opinions? Probably shouldn't have even attempted the 712 test after what the 700 looked like... I did test lower frequencies after and am getting good HW rates so it seems to not have done serious damage to the machine.
I did not factor in the effect of increasing power draw, as I am in a lucky situation where electricity is included in my rent
(and depending on what your $/kWh costs are, results may vary).
Finally got my Kill A Watt in the mail, so I tinkered around with overclocking my A3 to find an optimal frequency setting. Results below, I hope this helps!
Setup
Miner: Antminer A3 815GH/s
PSU: EVGA SuperNOVA 1600 G2
Circuit: 120v, 20A dedicated
Environment:Intake fan resting at open window, weather around 40F
Methodology
Pretty straightforward...
- Adjust the frequency setting on the Antminer
- Let the Antminer run for 5-7 minutes
- Once stable, record the data
- If a test seems like an outlier, re-test that frequency later to confirm (No results ended up changing, initial results were confirmed)
Results
| Frequency | Avg. Hashrate | ATW Wattage | PCB Temp | Chip Temp | Fan Speed | HW Error % |
| 575 | 800.49 | 1256 | 50.0 | 66.7 | 3930 | 0.0000% |
| 600* | 825.24 | 1315 | 50.0 | 71.0 | 4020 | 0.0013% |
| 650 | 895.13 | 1434 | 52.7 | 71.0 | 4020 | 0.0086% |
| 662 | 921.02 | 1475 | 53.0 | 73.3 | 4020 | 0.0478% |
| 675 | 927.45 | 1500 | 53.3 | 74.7 | 4290 | 0.2498% |
| 681 | 945.73 | 1524 | 54.3 | 73.0 | 4260 | 0.9370% |
| 700 | 948.71 | 1555 | 53.7 | 74.7 | 4290 | 2.7230% |
| 712 | 828.64 | 1595 | 55.6 | 77.0 | 4440 | 18.3536% |
Seems like the sweet spot is around 662-681. Not sure if I feel comfortable running at nearly 1% HW Error Rate, despite the increase in Hashrate. Comments/Opinions? Probably shouldn't have even attempted the 712 test after what the 700 looked like... I did test lower frequencies after and am getting good HW rates so it seems to not have done serious damage to the machine.
I did not factor in the effect of increasing power draw, as I am in a lucky situation where electricity is included in my rent
(and depending on what your $/kWh costs are, results may vary).