KF1921 Whatsminer ASIC Chip for Hashboard Repair M20 M20S M21 M21S
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KF1921 Whatsminer ASIC Chip for M20 / M20S / M21 / M21S Hashboard
Upgrade your Whatsminer M20, M20S, M21, or M21S with high-quality replacement KF1921 chips. Quick and easy solution to get your mining equipment up and running again. With a focus on quality, our chips are designed to provide exceptional performance across the M20 / M21 generation.
These KF1921 chips are specifically designed for use on the hashboard of WhatsMiner models — ensuring compatibility and seamless integration. They are brand new, sourced from the original manufacturer, and are of the SMD type for standard hot-air / reflow rework workflow.
Ordering Requirements
- Minimum order quantity: 10 chips.
- When placing your order, provide the last 7 digits and letters of the hashing code to receive the correct chip variant matched to your specific Whatsminer model.
- Variant matching ensures compatibility — KF1921 has sub-variants tuned to different M20 / M21 board revisions.
Typical Use in M20 / M21 Hashboard Repair
- Hashrate restoration — replacing dead chips that fail chip-scan diagnostics.
- Domain recovery — restoring missing power domains caused by single failed chip.
- Production refurbishment — bulk KF1921 stock for M20 / M21 rework lines.
- End-of-life sustainment — keeping legacy Whatsminer M-series fleets productive.
KF1921 Specifications
| Feature | Specification |
|---|---|
| Part Number | KF1921 |
| Manufacturer | MicroBT (Whatsminer original) |
| Type | SMD (Surface Mount Device) |
| Compatibility | Whatsminer M20, M20S, M21, M21S |
| Function | SHA-256 hashing ASIC |
| Minimum Order Quantity | 10 chips |
| Order Requirement | Provide last 7 digits/letters of hashing code for variant match |
| Condition | Brand New |
FAQ — KF1921 ASIC Chip
Q: Why is the MOQ 10 chips?
A: KF1921 is a per-domain hashing chip, not a single-chip-per-board component. Realistic hashboard repair typically requires replacing multiple chips at once (per failed domain). MOQ of 10 matches typical batch-repair volumes and supports better unit pricing.
Q: What's the "last 7 digits of hashing code" for?
A: KF1921 has sub-variants matched to different M20 / M21 board revisions and firmware versions. The 7-digit hashing code (printed on existing chips or in miner web UI) identifies which exact variant your board uses. Providing it ensures we ship the correct sub-variant for drop-in compatibility.
Q: KF1921 vs KF1930 vs KF1950 — which for my miner?
A: KF1921 = M20 / M20S / M21 / M21S. KF1930 = M30 / M30S. KF1950 = M30S / M21S (different sub-generation). KF1969 / KF1980E = M50 / M60. Confirm the chip silk marking on your board before ordering — wrong family won't deliver expected hashrate.
Q: Bulk pricing beyond MOQ 10?
A: Yes — email contact@lys-sz.com with your monthly volume for tier pricing on KF1921 stock by the reel.
Related products
- KF1930 ASIC Chip – Whatsminer M30 / M30S
- KF1950 ASIC Chip – Whatsminer M30S / M21S
- KF1969 ASIC Chip – Whatsminer M50
- Whatsminer M60 / M50 / M30 Hashboard Test Fixture
M20 / M21 repair shops stocking KF1921 by the reel? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouses.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
