Raspberry Pi CM5 seen in the wild

jsheard 2 years ago |

We all knew this was coming, but my question is what's the topology? The same as the regular Pi5, with the RP1 southbridge built-in and only one PCIe lane exposed for the user, or does the CM5 leave off the RP1 and break out all five PCIe lanes for user shenanigans? They have a bare chip supply chain set up from the RP2040, so they could sell the RP1 separately for those who want to integrate it onto their carrier boards.

jacobmarble 2 years ago | |

It looks like the CM5 still has one PCIe lane. https://pip.raspberrypi.com/categories/945-forward-guidance

ceinewydd 2 years ago | | |

Be aware that discussing anything in the CM5 Forward Guidance document is tricky, the document still says -

"This whitepaper is restricted and covered by the Raspberry Pi Ltd non-disclosure agreement (NDA). It should not be copied, shared, or duplicated without permission."

jsheard 2 years ago | | |

I signed up with a disposable email and got access automatically, it's not that secret evidently. It was probably stricter earlier in development.

syene 2 years ago | | |

Good thing nearly none of us here have signed that NDA.

eqvinox 2 years ago |

I kinda don't understand the point of the CM5. If you want a SoM, you're generally building something "fancy" around it… and at that point anything involving Broadcom is just about the worst choice.

I guess it gets some bump from the shared platform with the Pi, but… there's enough SoMs with good platform support at this point. And it's not like they're notably cheaper than those either?

(ed. I guess they are still cheaper than competing SoMs with roughly equal performance… but you pay the price of a poor closed platform instead)

postpawl 2 years ago | |

> there's enough SoMs with good platform support at this point

You’re talking about the new (and expensive) Turing RK1 and the Nvidia Jetson as alternatives?

eqvinox 2 years ago | | |

Turing RK1 and similar, nVidia not as much given their platform accessibility is barely better than Broadcom. RK1 is not particularly great either but significantly better than either Broadcom or nVidia.

I agree the really well supported platforms are both older as well as more expensive (e.g. i.MX & Sitara platforms.) However, I won't call the RK1 "expensive" considering it outperforms the Raspberry Pi (5) by a larger factor than it is pricier by (roughly.)

[Ed.:] Actually, no, the RK1 isn't better either, given there doesn't even seem to be a datasheet available for the module as a whole.

I guess I'm just living in my expensive but well-supported world of NXP, TI and ST SoMs that I can actually debug…

tambourine_man 2 years ago |

CM stands for compute module, for those wondering like me

jimbobthrowawy 2 years ago |

Did anyone grab a screenshot or copy of this before it was deleted? Archive.is/archive.org don't seem to have it.

Quasimarion 2 years ago | |

Snapshot by link caching app:

https://imgur.com/a/EkcXHGh

raminf 2 years ago |

Went down the voice assistant rabbit-hole with Home Assistant. To integrate with an LLM, you will need a separate processor (or connect to the cloud service).

Wondering if CM5 will offer enough of a boost to allow on-device LLM processing on a Home Assistant Yellow.

Guessing the answer is no, but it might be worth trying.

johann8384 2 years ago | |

Orange Pi.

RIMR 2 years ago |

Are we 100% sure that this picture of a CM4 box with a CM5 sticker slapped on it is legitimate?

jacobmarble 2 years ago |

Here's the official CM4 => CM5 technical guidance: https://pip.raspberrypi.com/categories/945-forward-guidance

mdotk 2 years ago |

What does this mean for someone non-technical who uses a Pi for home files server?

Gasp0de 2 years ago | |

Nothing.

refulgentis 2 years ago | | |

Okay, I'll bite: what's going on? Seriously. I know what a Raspberry Pi 5 is, I have one. No idea what I'm supposed to take away from a "CM5"

technofiend 2 years ago | | |

CM5 is just shorthand for Compute Module 5. It's a raspberry pi 5 in a different form factor. Until it's released we can't know all the exact differences without apparently signing up for an NDA'd spec sheet. But see https://www.makeuseof.com/raspberry-pi-4-vs-raspberry-pi-com... for a breakdown of how the PI 4 and CM 4 differed.

cicloid 2 years ago |

I've been waiting for this, now, the question is, is this a drop-in replacement for the CM4? If so, these will sell really well (and will have shortages)

Pet_Ant 2 years ago |

Will it be compatible with things like the CM4 I/O board?

gorkish 2 years ago |

If CM5 doesn't at minimum expose the PCIe x4, I'm going to flip some fucking tables over.

dheera 2 years ago |

The trouble with these CM's is by the time you get your hands on CM5 and engineer your custom carrier board for it (because they change the pinout every time), Pi 6 has come out.

sircastor 2 years ago | |

Hopefully they're sticking with the same connectors and pinout as the CM4. The Raspberry Pi foundation considers the Compute Module line to be non-hobbiest-oriented anyway. They expect people to be building around the solution offered as a long-term product. The NEC display is a good example, because NEC is interested in driving the display for the life of the display, not in customers replacing the CM4 when its EOL.

srott 2 years ago | |

It won’t fit into rpi 400?

sircastor 2 years ago | | |

The Raspberry Pi 400 is a distinct product. It doesn't use a Compute module internally.