Antminer S21e Hydro Water Cooling Plate – Unibody Aluminium Heatsink

Antminer S21e Hydro Water Cooling Plate – Unibody Aluminium Alloy CNC-Milled Replacement Heatsink for Bitmain S21e Hyd Hashboard

This water cooling plate is the direct replacement for the original heatsink on the Bitmain Antminer S21e Hydro (S21e Hyd) miner. It is built from unibody aluminium alloy, precision CNC-milled, and features a fluid-optimised water flow channel design that fits tightly against the S21e Hydro hashboard's ASIC chip surface — dissipating the continuous heat generated by the chips during 24/7 mining duty. Swapping in a fresh plate resolves the three classic hydro-plate faults: poor water flow, inadequate heat dissipation, and water seepage or leakage.

Result on a repaired S21e Hydro: lower cooling temperatures, quieter operation, stable hash-rate output, and a lower risk of chip overheating and premature ageing — the reason this plate is stocked as a standard spare for small-to-medium mining farms, quiet-server-room hydro retrofits, and any operator maintaining an S21e Hydro fleet.

Why This Plate for the S21e Hydro

Hydro-cooled miners like the S21e Hydro throw their entire thermal budget onto the coolant loop. A cooling plate that has cracked, warped, or partially blocked its flow channels will silently drive coolant temperatures up until the miner throttles or hits protection shutdown — and a plate that has begun to seep will destroy the hashboard beneath it long before you notice. This replacement plate is drilled to the S21e Hydro's original screw-hole positions, matches the ASIC chip footprint on the hashboard, and has been water-pressure leak-tested at the factory before shipping.

4 Core Advantages

1. Integrated aluminium alloy with excellent thermal conductivity — anti-oxidation sandblasted surface treatment, corrosion-resistant, does not oxidise under sustained coolant contact.
2. Professionally designed internal circulation channels — uniform water flow across the full chip array, higher heat-exchange efficiency than a straight-channel plate.
3. Drilled to original Bitmain S21e Hydro hashboard dimensions — precise screw-hole alignment ensures a tight fit against every chip, eliminating gaps and interruptions in the heat-conduction path.
4. Every plate factory water-pressure leak-tested — no seepage or leakage risk out of the box, safe for extended continuous mining operation.

When to Replace the S21e Hydro Cooling Plate

• Poor coolant flow — flow rate drops on the CDU display without a matching change in pump duty.
• Inadequate heat dissipation — coolant temperatures rising, chip junction temps climbing, hash rate drifting down under stable ambient conditions.
• Water seepage or leakage — any visible dampness or drip around the plate is an immediate replacement scenario before it reaches the hashboard.
• Visible plate damage — dented, cracked, corroded surface, damaged G1/4 fittings.
• Refurbishment / OEM spare replacement — routine swap during hashboard rebuild or scheduled fleet maintenance.

Installation Notes

Power off the miner, depressurise the cooling loop and drain the plate before disassembly. Unscrew the failed plate from the hashboard following a diagonal loosening pattern to avoid warping the board. Remove any residual thermal grease from the ASIC chip tops with isopropanol and a lint-free wipe. Apply a fresh layer of thermal grease (≥6 W/m·K silicone gel recommended) using an S21e-compatible stencil where possible, then lower the new plate onto the chips — do not slide — and torque the mounting screws in a diagonal cross pattern for even pressure. Connect the coolant inlet/outlet through the standard G1/4 male quick connectors, re-pressurise the loop, check for leaks at every joint, and only then re-energise the miner.

S21e Hydro Water Cooling Plate Specifications

Related Bitmain Hydro Cooling & S21e Hydro Parts

• Antminer S21 / T21 Water Cooling Plate – Sister S-Series Hydro Heatsink
• APW11 PSU Water Cooling Plate – S21XP / S19XP Hydro
• Lian Li 8 kW ASIC Water Cooling Row – Hydro Loop Radiator
• Double-Seal Quick Connector – ASIC Miner Water Cooling Tubes (G1/4 Ecosystem)

Maintaining a fleet of S21e Hydro miners or stocking spare cooling plates for a workshop? Contact us at contact@lys-sz.com for bulk pricing and matched hydro-loop repair-kit bundles.

Worldwide shipping from our Shenzhen warehouse.