Quick answer
A miner that runs but underperforms is usually losing chips, throttling on heat, or running a conservative profile. Find which one.
Compare actual vs rated hashrate, then chase the gap: missing chips, heat, or HW errors.
Full diagnostic flow
- A chain is short on chips → You're losing the hashrate of every chip from the break onward. Treat it as a chain break — bench diagnosis to recover the board. [Send it in] Error-code guide →
- All chips present → Are chip temps high or is the firmware throttling/reducing frequency?
- Yes, running hot/throttling → Thermal throttling caps hashrate. Improve cooling and re-paste if needed — see the overheating tree. [Fix it yourself] Error-code guide →
- Temps are fine → Check the HW (hardware) error rate. Is it climbing fast?
- High/rising HW errors → Chips are returning bad nonces — an unstable overclock or degraded chips. Back off the frequency/voltage; if it persists at stock, a chip is marginal. [DIY with care] Error-code guide →
- HW errors low/normal → Likely a conservative firmware profile or input-voltage derating (e.g. running on 110V). Check the tuning target and PSU/input voltage. [Fix it yourself] Error-code guide →
This points at board-level damage. You can attempt it, but the realistic call for most owners is to send it to a repair bench.
Fix it yourself
Work the matching symptom decision tree and error-code guide step by step. Most cable, cooling, network and firmware faults are solvable on the bench you already own.
Send it to D-Central
Cracked solder, dead domains, shorted chips and EEPROM faults need a real repair bench. See transparent repair pricing or get a free repair quote — we diagnose and repair 38+ ASIC models in Laval, board-level, since 2016.
More tools: Kernel-Log Decoder · ASIC Fault Finder (650 codes) · All symptom trees
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Last reviewed June 12, 2026.