> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/installation/requirements.md).

# System Requirements

The requirements below apply to on-premise installations. For VIESUS Cloud there is nothing to install — see the [Cloud API](/reference/cloud-api/overview.md) section.

***

## VIESUS CLI

| Requirement                   | Windows                                          | Linux                                    |
| ----------------------------- | ------------------------------------------------ | ---------------------------------------- |
| OS                            | Windows 10 or later (x64)                        | Ubuntu 22.04 LTS or newer (x64 or arm64) |
| Disk space                    | \~8 GB                                           | \~8 GB                                   |
| RAM                           | 4 GB minimum; 16 GB for production               | 4 GB minimum; 16 GB for production       |
| NVIDIA GPU (AI features only) | Ampere or newer; ≥ 8 GB VRAM; CUDA 12.6 or later | Same                                     |
| VIESUS package                | `VIESUS_Viewer_and_CLI_Setup_*.exe`              | Three `.deb` files from transfer portal  |

***

## VIESUS PDF Enhancer

| Requirement               | Windows                                     | Linux                           |
| ------------------------- | ------------------------------------------- | ------------------------------- |
| OS                        | Windows 10 or later (x64)                   | Ubuntu 22.04 LTS or newer (x64) |
| RAM                       | 4 GB minimum; 16 GB+ for large PDFs         | Same                            |
| VIESUS base               | VIESUS CLI packages must be installed first | Same                            |
| PDF Enhancer package      | `viesusPDF_Setup_*.exe`                     | `viesuspdf_*.deb`               |
| NVIDIA GPU (AI upscaling) | Ampere or newer; ≥ 8 GB VRAM                | Same                            |

***

## VIESUS Node.js Module

| Requirement          | Value                                      |
| -------------------- | ------------------------------------------ |
| OS                   | **Linux only** (Ubuntu 22.04 LTS, x64)     |
| Node.js              | Version 18 or later                        |
| VIESUS base packages | Must be installed before the npm module    |
| CUDA driver          | 12.6 or higher (for GPU features)          |
| RAM                  | 1–2 GB per worker with AI features enabled |

***

## VIESUS C/C++ SDK

| Requirement           | Value                                   |
| --------------------- | --------------------------------------- |
| OS                    | Windows x64, Linux x64, Linux arm64     |
| Compiler              | C++11 or later                          |
| `IsEnhance.h` header  | Request from <info@viesus.com>          |
| VIESUS shared library | Included in the standard VIESUS package |

***

## VIESUS Cloud API

| Requirement      | Value                                                    |
| ---------------- | -------------------------------------------------------- |
| Account          | Free account at [viesus.cloud](https://www.viesus.cloud) |
| API key          | Generated in the dashboard                               |
| Internet access  | Required (API calls to `api.viesus.cloud`)               |
| File size limits | Images: 20 KB – 50 MB; PDFs: 20 KB – 1,000 MB            |
| Starting credits | 200 free credits on new accounts                         |

***

## GPU quick-check

Run this before installing. If GPU acceleration is needed:

**Linux:**

```bash
nvidia-smi
```

Look for `CUDA Version: 12.6` or higher in the output header. If `nvidia-smi` is not found or shows a lower CUDA version, [install or upgrade the NVIDIA driver](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/).

**Windows:**

```powershell
nvidia-smi
```

Or check: **Device Manager → Display Adapters** → right-click → Properties → Driver version.

{% hint style="danger" %}
GPU acceleration requires an NVIDIA GPU with **Ampere architecture or newer** (RTX 3000 series, A-series, or newer). Older cards (GTX 10xx, 20xx) do not support CUDA 12.6. AMD and Intel GPUs are not supported.
{% endhint %}

***

## What you can do without a GPU

Everything except AI features works on CPU:

| Feature                    | CPU  | GPU required    |
| -------------------------- | ---- | --------------- |
| Automatic color correction | ✓    |                 |
| Noise reduction            | ✓    |                 |
| Sharpening                 | ✓    |                 |
| Face detection             | ✓    |                 |
| Red-eye removal            | ✓    |                 |
| Classical upscaling        | ✓    |                 |
| AI Upscaling               | Slow | ✓ (recommended) |
| AI Artifact Removal        | Slow | ✓ (recommended) |
| Background Handling        | Slow | ✓ (recommended) |

For testing AI features without a local GPU, use [VIESUS Cloud](/reference/cloud-api/overview.md) — the GPU is hosted by Viesus AG.


---

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