Antminer S21 S21pro T21 S21xp Fan Speed Simulator for Water Cooling or Silent Blower
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Antminer S21 / T21 Fan Speed Simulator – Water Cooling & Silencer Upgrade
Upgrade your Antminer S21, S21 Pro, T21, or S21 XP to water cooling or install low-noise blowers without triggering the firmware's fan-error shutdown. This 4-in-1 fan speed simulator emulates normal RPM signals on all four fan headers simultaneously, so the miner continues hashing while your custom cooling solution handles the thermals.
4-in-1 Speed Controller for All S21/T21 Fan Headers
Bitmain's latest-generation miners monitor each fan channel independently. If any channel reports zero RPM, the board shuts down to prevent thermal damage. The simulator feeds a plausible tach signal to every header at once, giving you full freedom to replace the stock fans with a closed-loop water block, an immersion tank, or aftermarket silent blowers — whatever suits your noise and thermal requirements.
Easy Installation, No Firmware Changes
Simply unplug the stock fans, connect the simulator to the same 4-pin headers, and power on. There is no kernel patch, no SD card flash, and no warranty-voiding firmware modification. If you ever want to revert to air cooling, pull the simulator and re-attach the original fans.
S21/T21 Fan Speed Simulator Specifications
| Feature | Specification |
|---|---|
| Compatibility | Antminer S21, S21 Pro, T21, S21 XP |
| Channels | 4-in-1 |
| Function | Fan speed emulation |
| Cooling Support | Water, silent blower, immersion |
| Installation | Plug-and-play, no firmware mod |
Related S21/T21 Cooling & Simulator Products
- S21/T21 Water Cooling Plate & Heatsink
- S19K Pro 4-in-1 Fan Speed Simulator
- S19K 4-Pin Immersion Cooling Fan Simulator
- S21 Pro Aluminum Water Cooling Kit
Converting a full fleet to water cooling? Contact us at contact@lys-sz.com for simulator and cooling plate bundles.
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