BM1764AB Antminer ASIC Chip for D7 Hashboard

BM1764AB Hashing ASIC Chip | Antminer D7 X11 Hashboard Repair

The BM1764AB is the hashing ASIC used on the Antminer D7 hashboard — the chip that runs the X11 algorithm for Dash mining. Each D7 hashboard hosts a chain of 70 BM1764 chips arranged in 35 domains of 2 chips each, and the full miner runs at 1286 GH/s at 625MHz core frequency with ~3148W power draw. When one chip fails, the entire chain reports an error or drops to zero hashrate. Replacing the failed BM1764AB chip restores the chain and brings the hashboard back to rated output.

Chip-level repair is the standard recovery path for an Antminer D7 hashboard that reports an error code or fails to find all chips on the chain. The BM1764AB is a BGA ASIC — replacement requires hot-air rework with proper tin tool fixture and stencil for clean reballing, paired with a hashboard test fixture to validate the chain integrity post-rework before the board returns to production duty.

When You Need a BM1764AB Chip

• Antminer D7 hashboard reports chain error — chip count below the expected number on the chain.
• Hashboard hash rate drops below rated 1286 GH/s — degraded or failed chips.
• Hashboard intermittent crashes after thermal warm-up — micro-cracked chip from thermal cycling.
• Visible damage on a chip — burned die, lifted BGA balls, cracked package.
• Repair-bench rebuild of a D7 hashboard returning from field service.

Chip Specifications

• BM1764AB hashing ASIC — OEM-spec part for Antminer D7.
• X11 algorithm — Dash (DASH) cryptocurrency mining.
• BGA package — surface-mount, hot-air-rework reflow profile.
• Hashboard chip category — main hashing core, not control or power.
• New condition — fresh chip stock from supplier inventory.
• Availability — confirm current stock with our sales team before bulk orders.

BM1764AB Technical Specifications

FAQ — BM1764AB ASIC Chip

Q: How do I know which chip is failed on the hashboard?
A: Run a hashboard test fixture (with BM1764AB chain support) — it will identify the chip count and flag the position of the failed chip. Some D7 hashboard testers also pinpoint exact failing chip positions to streamline rework.

Q: What's the rework profile for a BM1764AB BGA?
A: Standard BGA reflow — preheat the hashboard to 100-150°C, ramp to peak around 240-250°C, hold for 30-60 seconds, controlled cooling. Use flux paste and clean the pads with isopropyl alcohol between heat-up and chip-place. Always use the BM1764AB tin tool fixture for clean reballing before reinstalling salvaged chips.

Q: Are these new chips or pulls?
A: New chips from supplier inventory. Pulls (chips recovered from scrap boards) are typically lower-cost but with no guaranteed yield — confirm new vs pull status when ordering.

Q: How many BM1764AB chips per D7 hashboard?
A: 70 chips per hashboard, arranged in 35 domains of 2 ASIC chips each. The full Antminer D7 (3 hashboards) runs 210 BM1764 chips total at 1286 GH/s aggregate hashrate.

Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com for tray-quantity pricing on BM1764AB stock.

Related products

• Antminer BM1764AB ASIC Chip Tin Tool (D7)
• Antminer D7 BM1764 Stencil (Tin Tool)
• BGA Reballing Stencil (Allwinner H6)
• Avalon A3205 Chip Tin Tool Fixture

Repair benches rebuilding Antminer D7 hashboards and stocking BM1764AB chips? Email contact@lys-sz.com for bulk pricing and matched repair-kit options (chip + tin tool + stencil). Worldwide shipping from our Shenzhen warehouse.