Antminer C87 Overclocking Control Board for Antminer L7 S19 Series Miners

Antminer C87 Overclocking Control Board | Performance Booster Motherboard for Antminer L7 and S19 Series Miners

The Antminer C87 Overclocking Control Board is a performance-tuned replacement motherboard for the Antminer L7 and the broader S19 series — S19, S19j, S19j Pro+, S19XP, S19A and other S19-family variants. Drops into the existing control-board slot and unlocks the miner's overclock headroom that the stock controller leaves on the table. For repair shops and miners running fleets at the limit, the C87 is the simple swap that converts a baseline miner into a higher-output unit.

Overclock envelope: the L7 can be tuned up to ~25% above stock hashrate, and the S19 series can achieve up to ~15% additional hashrate. Higher overclock comes with higher power draw and increased thermal load — the C87 is fully compatible with water cooling and oil cooling setups, which is where the upper end of the envelope becomes practical. Air-cooled use is supported but the achievable overclock will be constrained by the stock cooling system's thermal limit before the chip limit.

When to Install the C87 Control Board

• Increasing fleet output without buying additional hardware — overclock the existing miners to push hashrate per unit.
• Pairing with a water / oil cooling conversion — the C87's upper overclock envelope only opens up with hydro / immersion cooling carrying the extra thermal load.
• L7 (Scrypt / LTC + DOGE) fleets — 25% overclock potential is the largest gain in the supported lineup.
• S19 series BTC fleets — 15% additional hashrate per unit at the higher cooling specs.
• Replacing a failed stock control board with an upgrade — when the original board needs replacement anyway, choose the C87 for the performance upside.

Antminer C87 Overclocking Control Board Specifications

FAQ — Antminer C87 Control Board

Q: Will overclocking shorten my miner's service life?
A: Pushing the chips harder always raises thermal stress on the ASICs, capacitors and connectors. The shorter the service-life expectation, the more the overclock makes sense. For long-running deployment, stay closer to stock; for short ROI windows, the +15-25% can justify the increased wear.

Q: Do I need to change the PSU when installing the C87?
A: At the upper end of the overclock envelope yes — the standard APW12 / APW17 may not deliver enough power for the boosted hashrate. For the L7 at full +25%, a higher-wattage PSU (water-cooled in particular) is recommended. Check the wattage draw at your target overclock before deploying.

Q: Is the firmware open-source / customisable?
A: The C87 ships with a firmware preset for each supported model — the overclock profile is selectable from the dashboard. Verify the firmware matches your miner serial before powering on.

Q: Bulk pricing for fleet operators?
A: Yes — email contact@lys-sz.com with your fleet count and cooling type and we'll send tier pricing on the C87 + matching cooling components.

Related products

• Antminer S19K Pro C76 / A113D Control Board – Stock Replacement
• Antminer S19 Aluminum Water Cooling Block
• Antminer L7 Water Cooling Plate
• Antminer Immersion Cooling Oil-Resistant Power Cord

Fleet operators stocking C87 overclocking boards by the case? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.