Definition
- Fixed-frequency Antminer: all hashboards have the same frequency and the same hashrate.
- Auto-frequency Antminer: each hashboard has a different frequency and a different hashrate.
Antminer Models
| Fixed-frequency | Auto-frequency |
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V9，Z9mini，Z9，A3，B3，D3，D5，DR3，DR5，E3，L3，L3+，L3++，X3，B7； And the following hashboard types, S9：11.85T-550M、12.93T-600M、14T-650M； |
T series、R4、Z11 S series（NOTE：except for S9 hashboard types as 11.85T-550M, 12.93T-600M, and 14T-650M ) |
- Browse the full product specs here:
https://support.bitmain.com/hc/en-us/sections/360002496253
Firmware
Please carefully select the firmware based on your antminer's model.
>>For S9 models such as 11.85T-550M, 12.93T-600M, and 14T-650M, they use different firmware.
Return Whole Miner or Parts
- If you need to claim RMA for your auto-frequency miner, please send the complete unit back to us for repair; failure to do so will result in additional costs and severe delay in repair and all costs associated will be borne by you.
| RMA Policy | Antminer Model |
| Return the complete unit | S9 series, S11, S15, S17 series, T9 series, T15, T17 series, R4，Z11 series |
| Return the complete unit or parts | A3, B3, B7, D3, D5, DR3, DR5, E3, L3 series, S7, V9, X3, Z9 series |
Should you have any inquiries, contact us for further assistance.
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