Merge pull request #1399 from janhq/gpuDocs

docs: gpu not detected
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---
title: Failed To Fetch
title: Failed to Fetch
slug: /troubleshooting/failed-to-fetch
description: Troubleshooting "Failed to Fetch"
keywords:
[
keywords: [
Jan AI,
Jan,
ChatGPT alternative,
@ -17,19 +16,22 @@ keywords:
]
---
You may receive a "Error Occured: Failed to Fetch" response when you first start chatting with a selected model.
You may receive a "Error Occured: Failed to Fetch" response when you first start chatting with a selected model.
This may occur due to several reasons. Please follow these steps to resolve it:
1. Ensure you are on the latest version of Mac, Windows or Ubuntu OS version
- Upgrading to the latest version has resolved this issue for most people
2. Select a model that is smaller than 80% of your hardware V/RAM.
- For example, if you have a 8GB machine, you should select models smaller than 6GB.
- Upgrading to the latest version has resolved this issue for most people
2. Select a model that is smaller than 80% of your hardware V/RAM.
- For example, if you have a 8GB machine, you should select models smaller than 6GB.
3. Install the latest [Nightly release](https://jan.ai/install/nightly/)
- If you are re-installing Jan, it can help to [clear the application cache](https://jan.ai/troubleshooting/stuck-on-broken-build/)
4. Ensure your V/RAM is accessible by the application (some people have virtual RAM)
- If you are re-installing Jan, it can help to [clear the application cache](https://jan.ai/troubleshooting/stuck-on-broken-build/)
5. If you are on Nvidia GPUs, please download [Cuda](https://developer.nvidia.com/cuda-downloads)
4. Ensure your V/RAM is accessible by the application (some people have virtual RAM)
5. If you are on Nvidia GPUs, please download [Cuda](https://developer.nvidia.com/cuda-downloads)

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---
title: Jan is Not Using GPU
keywords: [
Jan AI,
Jan,
ChatGPT alternative,
local AI,
private AI,
convZ
ersational AI,
no-subscription fee,
large language model,
troubleshooting,
]
---
By default, Jan uses GPU acceleration.
If you are experiencing this issue, you may need to download the latest Nvidia CUDA toolkit.
> We weren't propagating CUDA issues in the old build.
Steps:
1. Download Cuda toolkit (versions 11.4+) from [Nvidia](https://developer.nvidia.com/cuda-downloads?target_os=Windows)
1. Go to Settings > Advanced > Turn on GPU acceleration
1. You may need to restart Jan
1. Check in `System Monitor` that there is more (V)RAM now
1. If the issue persists, please install the [Nightly version](/install/nightly) instead.
1. If the issue persists, ensure your (V)RAM is accessible by the application. Some folks have virtual RAM and needs additional configuration.
1. Get help in [Jan Discord](https://discord.gg/mY69SZaMaC).