K1Pool and GMiner release SHA-256 ASIC firmware 1.30 with hot-chip frequency control
Source report: 2026-09-25 · Editorial analysis published: 2026-09-27
K1Pool lists GMiner firmware 1.30 as the latest release. It can automatically lower frequency on hot BM1368 chips, expands chip and hardware-error visibility, adds temperature sorting and moves less-used controls into advanced panels. Operators should test claims on their own hardware.
Analysis and practical implications
This section is our analysis and illustrative calculations, separate from the source report.
What version 1.30 adds
K1Pool announced version 1.30 of its GMiner-based SHA-256 ASIC firmware on September 25, 2026. The published changelog adds an option that automatically lowers the frequency of hot chips on BM1368-based T21 and S21 machines, S19 XP+ and S19 XP+ Hydro models. It also says the Performance page now shows chip numbers and hardware errors. The companion Toolkit can sort devices by temperature, while new advanced Cooling and Performance panels contain controls that were moved out of the main interface.
Hot-chip control works below the whole-machine level
A hashboard can contain one chip that runs hotter or becomes unstable before the rest of the chain reaches its limit. Lowering only that chip’s frequency can preserve more work than dropping the profile for the whole miner, provided detection and control are accurate. It is still a tradeoff: the affected chip contributes less hashrate, and repeated intervention can signal poor contact, dust, uneven coolant flow or silicon degradation. Operators should use the feature as protection and diagnostic evidence, not as a way to hide persistent thermal defects.
The advertised performance claim needs local measurement
The product page promotes up to 40 percent higher hashrate and lower electricity consumption, while noting that tuning depends on the miner model. “Up to” is a maximum marketing claim, not a result every device will reproduce, and more hashrate does not automatically mean better joules per terahash. A useful test records stock and tuned pool-side hashrate, wall power from a calibrated meter, rejected shares, fan or pump load and room conditions. Profitability must also include the firmware fee, pool terms, warranty effects and the cost of additional cooling.
New monitoring can shorten diagnosis
Displaying chip identifiers and hardware errors next to performance data can help technicians connect instability with a specific position instead of treating an entire miner as one value. Temperature sorting is useful when hundreds of units share an aisle because it can surface the hottest devices quickly. These tools depend on correct telemetry and naming. Farms should verify that reported chip, board and device identities match physical labels, standardise time settings and export logs before rebooting so an intermittent event is not lost.
Advanced settings were reorganised
Version 1.30 adds advanced Cooling and Performance tabs and moves quieter mode, hashboard cooling and hot-chip reduction options into those areas. A cleaner main screen can reduce accidental changes, but a moved control can also be missed during incident response. Update operating procedures and screenshots after deployment, set role permissions where available and record the expected values for each profile. A configuration audit after the flash should confirm temperature targets, fan limits, pool failover, startup delay and the new hot-chip option.
The supported list is broad but specific
K1Pool publishes a detailed table for S19, T19, T21 and S21 variants, including individual hashboard identifiers, and lists Xilinx, BeagleBone, Amlogic and CVITEK control boards. That table matters more than a family name printed on a case. Two miners sold under similar model labels may use different boards or signed stock firmware. Before installation, match the exact hashboard and controller, read the current compatibility entry and use the documented Toolkit path. Do not assume a package for one submodel is safe for another.
Third-party firmware changes operational risk
Installing custom firmware can affect warranty support, recovery options, remote access and the trust model of a farm. The K1Pool page says the project is an official collaboration with GMiner, offers rollback and recovery options and has no hidden developer fee, but operators should still obtain files from the linked official repository and verify hashes or signatures when provided. Restrict management access, change default passwords, separate miners on a controlled network and review outbound pool connections before approving fleet-wide use.
Use a staged benchmark and rollback plan
Select a representative canary group, save settings, note stock firmware versions and prepare recovery media before flashing. Run the same power target long enough for continuous tuning to settle, then compare accepted shares, errors, uptime, wall power and thermal spread with a control group. Test a planned reboot and primary-to-backup pool failover. If results regress, roll back with the documented method rather than changing several thermal and voltage settings at once, which would make the cause impossible to isolate.
What operators should verify after 1.30
The clearest success criteria are fewer hot-chip incidents without an unacceptable fall in hashrate, stable hardware-error rates, accurate temperature ordering and unchanged pool security. Review the new advanced panels, confirm that BM1368 controls appear only on compatible machines and document any difference between the interface and actual behavior. Version 1.30 provides useful safeguards and visibility, but its value depends on site conditions and disciplined validation. Treat the release as software to qualify, not a guaranteed profit multiplier.
Source: K1Pool / GMiner ↗
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