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David Koteski edited this page Apr 30, 2026 · 1 revision

Model Database

The model database maps a device's WMI baseboard Product string (a 4-character hex ID, e.g. 8A14) to a set of EC register addresses. It lives in the <Models> section of OmenMon.xml and is loaded into Config.Models at startup.

Finding your Product ID

Run the following from an elevated command prompt or PowerShell:

(Get-WmiObject Win32_BaseBoard).Product

Or use OmenMon itself:

OmenMon.exe -Bios

The Product field in the output is the ID you need.

XML schema

Add a <Model> element inside <Config><Models>:

<OmenMon>
  <Config>
    <Models>
      <Model ProductId="8A14" DisplayName="Omen 16 2022 (b1xxx, i9-12900H)">
        <FanLevelReg0>52</FanLevelReg0>
        <FanLevelReg1>53</FanLevelReg1>
        <FanRateReadReg0>46</FanRateReadReg0>
        <FanRateReadReg1>47</FanRateReadReg1>
        <FanRateWriteReg0>44</FanRateWriteReg0>
        <FanRateWriteReg1>45</FanRateWriteReg1>
        <FanSpeedReg0>176</FanSpeedReg0>
        <FanSpeedReg1>178</FanSpeedReg1>
        <CountdownReg>99</CountdownReg>
        <ManualReg>98</ManualReg>
        <ModeReg>149</ModeReg>
        <SwitchReg>244</SwitchReg>
      </Model>
    </Models>
  </Config>
</OmenMon>

All register values are decimal integers (0–255). The table below shows the mapping to named EC registers:

XML element EC name Decimal Hex Purpose
FanLevelReg0 SRP1 52 0x34 CPU fan setpoint [krpm]
FanLevelReg1 SRP2 53 0x35 GPU fan setpoint [krpm]
FanRateReadReg0 XGS1 46 0x2E CPU fan duty cycle readback [%]
FanRateReadReg1 XGS2 47 0x2F GPU fan duty cycle readback [%]
FanRateWriteReg0 XSS1 44 0x2C CPU fan duty cycle write [%]
FanRateWriteReg1 XSS2 45 0x2D GPU fan duty cycle write [%]
FanSpeedReg0 RPM1 176 0xB0 CPU fan speed low byte [rpm, word]
FanSpeedReg1 RPM3 178 0xB2 GPU fan speed low byte [rpm, word]
CountdownReg XFCD 99 0x63 Manual-mode auto-reset countdown [s]
ManualReg OMCC 98 0x62 Manual fan control enable
ModeReg HPCM 149 0x95 Performance mode preset
SwitchReg SFAN 244 0xF4 Fan off switch

Note on RPM word layout: FanSpeedReg0 points to the low byte of a little-endian 16-bit word. The high byte is at FanSpeedReg0 + 1 (RPM2, 0xB1). Same pattern for FanSpeedReg1 / RPM4. This is why the GPU fan uses RPM3 (0xB2) and not RPM2 — RPM2 is the CPU high byte.

Known model IDs

The following IDs have been reported in upstream issues. Entries marked ✅ have been verified; entries marked ❓ are based on issue reports and need a -Probe dump to confirm correct register addresses.

ProductId Device Status
8A13 Omen 16 2022 (early) ✅ Default layout
8A14 Omen 16 2022 (b1xxx) ✅ Default layout
8A4C Omen 16 2022 (k0xxx) ✅ Default layout
8A4D Omen 16 2022 refresh ❓
8C9C Victus 16 s1023dx (2024) ❓
8A3E Victus 15 fb0102la ❓
8748 Omen 17 cb1046nr (2021) ❓
88FE Omen 17 ck0xxx (2020) ❓
88EC Victus 16 e0008nt (2021) ❓
8574 Omen 15 dc1xxx (2018) ❓
878D Envy 15 ep0003nl (2020) ❓

To add a confirmed entry, open a pull request editing the default OmenMon.xml with the new <Model> block and attach the -Probe Markdown output as evidence.

Auto-saved entries

When the Auto-Detector confirms the default layout for an unknown device, it writes the entry to the user's local OmenMon.xml automatically. Those entries are not in the compiled-in defaults — they only exist on that machine until someone submits a PR to add them to the shipped XML.

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