rtx5090-xbar-control/llms.txt at main · SHANAjam/rtx5090-xbar-control · GitHub

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# xbar5090

Windows RTX 50-series XBAR (crossbar) / MSVDD / propagation ratio / V/F control via private NvAPI.

## Key facts

- Supports desktop and laptop RTX 50-series GPUs (5050, 5060, 5060 Ti, 5070, 5070 Ti, 5080, 5090, 5090 D, 5090 D v2).
- Validated drivers: 572.16, 576.02, 580.88, 581.42, 591.86, 596.49, 610.62, 610.88.
- Uses private NvAPI function IDs (e.g. 0xE826E4F0, 0xF58938F5).
- Requires mVolt+ for voltage observation/sync.
- Includes L2 data-integrity stability test.

## Documentation

- README: https://github.com/SHANAjam/rtx5090-xbar-control/blob/main/README.md
- Chinese README: https://github.com/SHANAjam/rtx5090-xbar-control/blob/main/README.zh-CN.md
- Technical notes (EN): https://github.com/SHANAjam/rtx5090-xbar-control/blob/main/docs/TECHNICAL_NOTES.md
- Technical notes (ZH): https://github.com/SHANAjam/rtx5090-xbar-control/blob/main/docs/TECHNICAL_NOTES.zh-CN.md

## Key commands

```powershell
python run.py status --json
python run.py wizard
python run.py set-xbar --freq-khz 200000 --msvdd-uv 10000 --yes
python run.py set-ratio --ratio 1.2 --yes
python run.py vfp-auto-range --msvdd-mv 1150 --freq-khz 88000 --yes
python run.py l2-test
```

## Suggested starting point

- Sync MSVDD with NVVDD in mVolt+.
- Ratio 1.2.
- Start XBAR at +200 MHz.
- Start VF at +88 MHz, but tune per card; 88 MHz is not a universal conservative value.

## Feedback

Report issues at https://github.com/SHANAjam/rtx5090-xbar-control/issues