Run
```bash
grep Revision /proc/cpuinfo
```
and look it up on https://elinux.org/RPi_HardwareHistory.
<span id="more-5520"></span>
| Revision | Release Date | Model | PCB Revision | Memory |
| -------- | ------------ | ------------------------------- | ------------ | --------------- |
| `Beta` | Q1 2012 | B (Beta) | ? | 256 MB |
| `0002` | Q1 2012 | B | 1.0 | 256 MB |
| `0003` | Q3 2012 | B (ECN0001) | 1.0 | 256 MB |
| `0004` | Q3 2012 | B | 2.0 | 256 MB |
| `0005` | Q4 2012 | B | 2.0 | 256 MB |
| `0006` | Q4 2012 | B | 2.0 | 256 MB |
| `0007` | Q1 2013 | A | 2.0 | 256 MB |
| `0008` | Q1 2013 | A | 2.0 | 256 MB |
| `0009` | Q1 2013 | A | 2.0 | 256 MB |
| `000d` | Q4 2012 | B | 2.0 | 512 MB |
| `000e` | Q4 2012 | B | 2.0 | 512 MB |
| `000f` | Q4 2012 | B | 2.0 | 512 MB |
| `0010` | Q3 2014 | B+ | 1.0 | 512 MB |
| `0011` | Q2 2014 | Compute Module 1 | 1.0 | 512 MB |
| `0012` | Q4 2014 | A+ | 1.1 | 256 MB |
| `0013` | Q1 2015 | B+ | 1.2 | 512 MB |
| `0014` | Q2 2014 | Compute Module 1 | 1.0 | 512 MB |
| `0015` | ? | A+ | 1.1 | 256 MB / 512 MB |
| `a01040` | Unknown | 2 Model B | 1.0 | 1 GB |
| `a01041` | Q1 2015 | 2 Model B | 1.1 | 1 GB |
| `a21041` | Q1 2015 | 2 Model B | 1.1 | 1 GB |
| `a22042` | Q3 2016 | 2 Model B (with BCM2837) | 1.2 | 1 GB |
| `900021` | Q3 2016 | A+ | 1.1 | 512 MB |
| `900032` | Q2 2016? | B+ | 1.2 | 512 MB |
| `900092` | Q4 2015 | Zero | 1.2 | 512 MB |
| `900093` | Q2 2016 | Zero | 1.3 | 512 MB |
| `920093` | Q4 2016? | Zero | 1.3 | 512 MB |
| `9000c1` | Q1 2017 | Zero W | 1.1 | 512 MB |
| `a02082` | Q1 2016 | 3 Model B | 1.2 | 1 GB |
| `a020a0` | Q1 2017 | Compute Module 3 (and CM3 Lite) | 1.0 | 1 GB |
| `a22082` | Q1 2016 | 3 Model B | 1.2 | 1 GB |
| `a32082` | Q4 2016 | 3 Model B | 1.2 | 1 GB |
| `a020d3` | Q1 2018 | 3 Model B+ | 1.3 | 1 GB |
| `9020e0` | Q4 2018 | 3 Model A+ | 1.0 | 512 MB |
| `a02100` | Q1 2019 | Compute Module 3+ | 1.0 | 1 GB |
| `a03111` | Q2 2019 | 4 Model B | 1.1 | 1 GB |
| `b03111` | Q2 2019 | 4 Model B | 1.1 | 2 GB |
| `c03111` | Q2 2019 | 4 Model B | 1.1 | 4 GB |