Run the [`PixArtAlphaPipeline`] with under 8GB GPU VRAM by loading the text encoder in 8-bit precision. Let's walk through a full-fledged example.  
First, install the [bitsandbytes](https://github.com/TimDettmers/bitsandbytes) library:  
```bash
pip install -U bitsandbytes
```  
Then load the text encoder in 8-bit:  
```python
from transformers import T5EncoderModel
from diffusers import PixArtAlphaPipeline
import torch