Specs:
Broadcom BCM2711 quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz H.265 (HEVC) (up to 4Kp60 decode), H.264 (up to 1080p60 decode, 1080p30 encode) OpenGL ES 3.0 graphics Options for 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on variant)
Options for 0GB ("Lite"), 8GB, 16GB or 32GB eMMC Flash memory (depending
on variant)
Option for fully certified radio module:
2.4 GHz, 5.0 GHz IEEE 802.11 b/g/n/ac wireless;
Bluetooth 5.0, BLE;
On-board electronic switch to select either external or PCB trace antenna
More info: https://www.raspberrypi.org/products/compute-module-4/?variant=raspberry- pi-cm4001000
Faux Dameron <fauxdameron@mailfence.com> wrote:variant=raspberry-
Specs:
Broadcom BCM2711 quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
H.265 (HEVC) (up to 4Kp60 decode), H.264 (up to 1080p60 decode, 1080p30
encode)
OpenGL ES 3.0 graphics Options for 1GB, 2GB, 4GB or 8GB LPDDR4-3200
SDRAM (depending on variant)
Options for 0GB ("Lite"), 8GB, 16GB or 32GB eMMC Flash memory
(depending on variant)
Option for fully certified radio module:
2.4 GHz, 5.0 GHz IEEE 802.11 b/g/n/ac wireless;
Bluetooth 5.0, BLE;
On-board electronic switch to select either external or PCB trace
antenna
More info:
https://www.raspberrypi.org/products/compute-module-4/?
pi-cm4001000
Thanks for posting, it wasn't clear that they were going to do a CM
version of the Pi4 when I looked into it a while ago. Interesting change
in design.
I wonder how close in size that it to a mini-ITX motherboard and, if
similar, do it's hold-downs match the mounting lugs in a mini-ITX case.
On Mon, 19 Oct 2020 22:29:08 -0000 (UTC)
Martin Gregorie <martin@mydomain.invalid> wrote:
I wonder how close in size that it to a mini-ITX motherboard and, if
similar, do it's hold-downs match the mounting lugs in a mini-ITX case.
It is a great deal smaller than a mini-ITX motherboard at 55mmx40mm. You could pack a pretty large cluster of them in a mini-ITX case with a little ingenuity and a good fan.
I wonder how close in size that it to a mini-ITX motherboard and, if
similar, do it's hold-downs match the mounting lugs in a mini-ITX case.
Ahem A Rivet's Shot wrote:
You could pack a pretty large cluster of them in a mini-ITX case with a
little ingenuity and a good fan.
In fact that is precisely what TuringPi does (aims to do). For now their ingenuity stops at 4, though: https://turingpi.com and https://turingpi.com/turing-pi-2-announcement/
Martin Gregorie wrote:
I wonder how close in size that it to a mini-ITX motherboard and, if similar, do it's hold-downs match the mounting lugs in a mini-ITX case.
CM4 is 55x40mm
miniITX is 170x170mm
A. Dumas wrote:
Ahem A Rivet's Shot wrote:
You could pack a pretty large cluster of them in a mini-ITX case with a
little ingenuity and a good fan.
In fact that is precisely what TuringPi does (aims to do). For now their ingenuity stops at 4, though: https://turingpi.com and https://turingpi.com/turing-pi-2-announcement/
Is that just intended as a "fun" project?
If so, then fine, have fun; but if not, I can't see a four x CM4 cluster being faster or cheaper than a workaday PC, even Oracle's one thousand x
Pi3 cluster seems kinda pointless ...
On Tue, 20 Oct 2020 07:50:30 +0100
Andy Burns <usenet@andyburns.uk> wrote:
Martin Gregorie wrote:
I wonder how close in size that it to a mini-ITX motherboard and, if
similar, do it's hold-downs match the mounting lugs in a mini-ITX case.
CM4 is 55x40mm
miniITX is 170x170mm
Hmm rows of three mounted vertically, probably need about a 2cm
pitch (height isn't specified) so a mini-ITX board with 24 compute modules could probably be built. The case would probably need to be mostly fan.
Martin Gregorie wrote:
I wonder how close in size that it to a mini-ITX motherboard and, if
similar, do it's hold-downs match the mounting lugs in a mini-ITX case.
CM4 is 55x40mm miniITX is 170x170mm
Or were you thinking of PC/104?
Either way you'd only be able to use one mounting hole
"The electrical interface of the CM4 is via two 100-pin high density connectors" and "The Module is 4.7 mm deep, but when connected the
height will be 5.078 or 6.578 mm depending on the stacking height
chosen." It also lists the complete pin-out:
The case would probably need to be mostly fan.
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