ASIC Miner PSU Reference: Bitmain APW Power Supplies, Watts, Voltage & I2C
Which power supply fits which miner — rated watts, input/output voltage, connectors, I2C voltage control and compatible miners for ASIC PSUs.
Quick answer
This reference covers 17 power supplies used by Bitcoin ASIC miners — rated wattage, input and output voltage, connector layout, whether the PSU supports I2C voltage tuning (9 do), efficiency, and which miners each unit powers. Use it to match a PSU to your miner or source a replacement.
Match watts AND voltage AND connector to your miner — an undersized or wrong-voltage PSU will trip, brown out, or damage a board. Free CSV/JSON under CC BY 4.0. Verify the exact unit revision before connecting.
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Bitmain (12)
| Model | Watts | Input | Output | Connectors | I2C | Powers |
|---|---|---|---|---|---|---|
| APW3/APW3++ Universal-input, no I2C MCU (fixed 12V). 1600W@220V / 1200W@110V; 133A@220V / ~100A@110V. Most common PSU for 120V home mining via firmware PSU-bypass. | 1,600 W | 100-264V | 12.15V (fixed; matrix lists 11.6-13.0V) | 10x 6-pin PCIe | No | S7, S9, S9i, S9j, S9k, S9 SE, T9 |
| APW5 ~1500W, ~125A. Fixed 12V, no I2C. Not 120V-compatible (200-240V only). | 1,500 W | 200-240V | 12V | — | No | S5, S7 (early models) |
| APW7 1800W@220V / 1000W@110V; 150A. Universal-input, no I2C MCU (simple fixed PSU). Works on 120V with firmware bypass. | 1,800 W | 100-264V | 11.6-13.0V (matrix); 12V fixed (Sec 16) | — | No | S9, S9i, L3+, D3, T9+, Z9 |
| APW8 (8-9.2V) 8-9.2V output variant. Current/wattage not stated in Bible. Bypass doc lists APW8 voltage-adjustable but I2C MCU/address/protocol 'Unknown'. Not 120V-compatible. | — | 200-240V | 8-9.2V | — | Yes | DR5 |
| APW8 (10-11V) 10-11V output variant. Current/wattage not stated. APW8 I2C details 'Unknown' per bypass doc. Not 120V-compatible. | — | 200-240V | 10-11V | — | Yes | S11 |
| APW8 (16-20V) 16.32-20.04V output variant. Current/wattage not stated. APW8 I2C details 'Unknown' per bypass doc. Not 120V-compatible. | — | 200-240V | 16.32-20.04V | — | Yes | S15, T15 |
| APW9 3600W@220V, 170A. I2C MCU PIC16F1704 at addr 0x10, Bitmain proprietary protocol, 400Hz. Not 120V-compatible. | 3,600 W | 200-240V | 14.5-21V | — | Yes | S17, S17 Pro, T17 |
| APW9+ 3600W@220V, 200A. I2C MCU PIC16F1704 at addr 0x10, Bitmain proprietary, 400Hz. Not 120V-compatible. | 3,600 W | 200-240V | 14.5-21V | — | Yes | S17+, S17e, T17+, T17e |
| APW12 (1215) 3600W@220V, 233A. PIC16F1704 I2C @0x10, 400Hz, frame 55 AA. V=15.1084-0.013046*DAC; practical 12.0V(code238)-15.0V(code8). ~60s watchdog. Versions a-g (d/e/f/g add voltage feedback). | 3,600 W | 200-240V | 12-15V (tunable via 8-bit DAC) | J3/J4 high-current OUT1 (233A); J6 12V/15A OUT2; J15 4-pin signal (SDA/SCL/EN/GND) | Yes | S19, S19 Pro, S19j, S19j Pro, T19 |
| APW12 (1417) 3600W@220V, 233A. 14-17V higher-voltage variant for L7/KA3 etc. Same Bitmain I2C protocol (PIC16F1704 @0x10, 400Hz). Model strings APW12_1417a/b. Not 120V-compatible. | 3,600 W | 200-240V | 14-17V | Same as APW12-1215 (J3/J4, J6, J15 4-pin) | Yes | L7, K7, DR7, HS3, KA3 |
| APW12A Fixed 12V variant with no voltage adjustment. Current/wattage not stated in Bible. | — | 200-240V | 12V (fixed) | — | No | Older models (no voltage adjustment) |
| APW17 (1215) 3600W@220V, 267A. Higher AC input (220-277V). Assumed same I2C frame protocol as APW12 (string 'APW17_'); not independently verified. S21 units known to have checksum errors. Not 120V-compatible. | 3,600 W | 220-277V | 12-15V | Different connector from APW12 (C20→P13); adapter cable needed for cross-use | Yes | S21, S21 Pro, S21 XP, S19j XP, KS5 |
Dell (1)
| Model | Watts | Input | Output | Connectors | I2C | Powers |
|---|---|---|---|---|---|---|
| EPP 750-2400W Server PSU, up to 2400W. Proprietary PMBus (not Bitmain APW protocol). Used via breakout board; needs firmware PSU-bypass. No I2C voltage adjustment. | 2,400 W | — | 12V (fixed) | Via breakout board (6-pin PCIe) | No | Antminers via breakout board + firmware bypass |
Generic / various (1)
| Model | Watts | Input | Output | Connectors | I2C | Powers |
|---|---|---|---|---|---|---|
| ATX PSU (generic) Generic ATX PSU, up to ~1600W. No I2C. Works with appropriate wiring; firmware enters passthrough mode (no PSU detected on I2C bus). | 1,600 W | — | 12V (fixed) | — | No | Antminers with appropriate wiring + firmware bypass |
HP (1)
| Model | Watts | Input | Output | Connectors | I2C | Powers |
|---|---|---|---|---|---|---|
| DPS-1200FB Server PSU. Speaks proprietary PMBus (not Bitmain APW protocol; no 0x83 DAC control). Used via breakout board; needs firmware PSU-bypass. No I2C voltage adjustment. | 1,200 W | — | 12V (fixed) | Via breakout board (6-pin PCIe, 100A+ @12V) | No | Antminers via breakout board + firmware bypass |
Meanwell (1)
| Model | Watts | Input | Output | Connectors | I2C | Powers |
|---|---|---|---|---|---|---|
| RSP series Industrial PSU, up to 3000W, 12-15V adjustable (mechanical/analog, not Bitmain I2C). Direct replacement possible; firmware sees no I2C PSU (passthrough mode). | 3,000 W | — | 12-15V (adjustable) | — | No | Antminers (direct replacement possible) + firmware bypass |
Zeus Mining / third-party (modified APW12) (1)
| Model | Watts | Input | Output | Connectors | I2C | Powers |
|---|---|---|---|---|---|---|
| APW12 OC (4000-8000W) Overclocking-rated modified APW12 PSUs: 4000W/~267A, 5000W/~333A (30A circuit), 6000W/~400A, 6500W/~433A, 8000W/~533A. Use same I2C protocol as stock APW12. 6500W+ require immersion cooling. | 8,000 W | 200-240V | 12-15V | — | Yes | — |
Source: the D-Central Mining Bible (PSU_PROTOCOL_BIBLE) + the Laval ASIC repair bench. Pairs with the diode & voltage reference and the miner spec database.
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Last reviewed June 19, 2026.