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Raspberry Pi B+
For the same $35 price as the original Model B, the Model B+ still uses the ARM-based Broadcom BCM2835 chipset, 512MB of RAM, and 700MHz low-power ARM1176JZ-F applications processor.
The improvements come with a more space efficient microSD card slot in place of the SDCard slot. It also has four USB 2.0 ports instead of the Model B's two. The new single-board computer (SBC) also has 40 general purpose Input/Output (GPIO) pins. The Model B has only 26. The B+ also has a single four-pin port for both both audio and video output. The audio circuit should also deliver cleaner sound with a new low-noise power supply.
Last, but not least, the B+ uses a half to full watt less power. If you're been working on Raspberry Pi projects that require long battery life, this is the SBC you've been waiting for.
HummingBoard SBC Family
OK, let's make this clear from the top: SolidRun's three HummingBoard SBCs are more expensive than the Raspberry Pi. The least powerful HummingBoard-i1 starts at $44.99 without a $10 power supply, while the top-of the-line HummingBoard-i2eX begins at $99.99 and goes up to $116.99, but, again, without a power supply.
On the other hand, what you get for your money is an SBC with a much more powerful processor and more RAM. It ranges from a Freescale i.MX6 with one or two Cortex-A9 cores running at 1GHz, with a C880 GPU for the two lower-end SBCs and a Vivante GC2000 for the high-end i23X. The bottom-end i1 comes with 51MBs of RAM while the other two models come with a GB of RAM.
For storage, the i1 and i2 use a MicroSD slot while the i2Ex adds a mSATA II interface. The former two use fast ethernet for network connectivity and come with two USB 2.0 ports; the i2Ex supports gigabit ethernet and includes four USB 2.0 ports.
The vendor states that all three support Android 4.4.x, Yocto, Ubuntu, Debian, FreeBSD and others.
Put it all together and what you get are powerful SBCs for users who want to tackle projects too big for a Raspberry Pi.