Raspberry Pi Compute Module 2 – running 32 LEDs and board close-ups. Blog article here http://raspi.tv/2014/raspberry-pi-compute-module-pt-2 source

Raspberry Pi Compute Module 3 (CM3) targets gadgets

Sort of announced in July 2016, the most up to date Raspberry Pi Compute Module 3 (CM3) is known to get to the market fastly. Last Oct PC equipment company NEC already announced a new spread of professional P and V Series large format displays that flawlessly implant the RPi CM3 module. The new module, obtainable in two flavors – CM3 and CM3L (lite) – will complement the CM1 module introduced some years ago.

Specifications for the CM1, CM3 and CM3L SODIMM modules can be found in the data sheet offered on the RPi internet site
https://www.raspberrypi.org/documentation/hardware/computemodule/RPI-CM-DATASHEET-V1_0.pdf
. Where the CM1 was based on a BCM2835 chip (as used on the original RPi and RPi B+ models), the CM3 sports a quad core 1.2 GHz BCM2837 central processing unit, like the RPi 3. It offers 1 Gigabyte of LPDDR2 RAM and 4 Gigabyte eMMC Flash. The ‘L’ version is a CM3 lacking eMMC Flash, allowing the buyer to connect his/her own SD/eMMC system. The pinout of the CM1 and CM3 modules are the same but the CM3 module is one millimeter higher (31 millimeters).

Price

The money necessary for the new modules isn’t known yet, but since a CM1 is sold at roughly £20, a similar price is likely to be predicted for the CM3.

Using : https://www.elektormagazine.com/news/raspberry-pi-compute-module-3-cm3-to-hit-the-market-soon

Specifications

The CM3 is based on the Raspberry Pi 3 hardware and is meant for industrial use to supply a inexpensive opportunity for people to make customized products based upon the Pi software and hardware platform. The Compute Module products is more compact and has less features and ports than a standard Raspberry Pi, allowing it to be suited to Internet of Things (IoT) products.

“The module utilizes a standard DDR2 SODIMM form factor, sockets for which are made by several makers, are comfortably accessible, and additionally are reasonable,” Raspberry Pi COO and hardware lead James Adams stated in a blog post.

You will find 2 variants of the CM3. Underneath are the specs for both:

Standard Variant:

BCM2837 central processor at up to 1.2Gigahertz
1Gigabyte RAM
4Gigabyte of on-module eMMC flash

Lite Model:

BCM2837 processor at up to 1.2GHz
1GB RAM
SD card interface on Module pins thus an individual can wire it up to an eMMC or SD card of their choice

Both variants can be slotted into a newly released Compute Module IO Board V3 (CMIO3) which helps you to perform the following:

Supplies essential power to the CM3
Allows you to program the CM3 Standard’s flash memory or to utilize an SD card on the Lite version.
Connect to the processor interfaces in a a little more friendly fashion (pin headers and flexi connectors, similar to the Pi)
Supplies the essential HDMI and USB connectors allowing you to have an entire system that can boot Raspbian (or the OS of your choosing).

“This board gives you both a starting template for those who want to design with the Compute Module, and a quick way to start tinkering with the hardware, and building and testing a system, before you go to the money necessary for making a custom board,” Adam said.

The older Compute Module model will continue to be delivered, for folks who do not need the CM3’s performance betterment. In line with the Raspberry Pi official mag The MagPi:

“With a couple of caveats, the CM3 can be utilized a drop-in substitute for the CM1 since they’re pin compatible; the CM3 is 1mm taller, nevertheless, while the CPU can pull a great deal more current from the VBAT power supply line and will definitely make a lot more heat under heavy load.”