Like the previous model, model B+ also consists of a 40-pin GPIO. GPIO stands for General Purpose Input Output pins these pins are used to connect the Raspberry pi board to external input/output devices. The status LEDs on the board now only contain red and green colors and are relocated to the opposite end of the board. Other Changes: The B+ version also comes with other improvements like the SD memory slot being replaced by a micro SD memory card slot (works similar to the previous version). PoE: B+ model comes with a facility of Power over Ethernet (PoE) a new feature added in this device which allows us to power the board using the ethernet cables. USB Hard Drive: The board is capable of using an external USB hard drive. HDMI and Composite Connection: Both the audio output socket and the video composite socket reside in a single 4-pole 3.5mm socket which is placed near the HDMI port, and now all the power and audio-video composite socket are placed on the one side of the board which gives it a clean and nice look. The power connector is also repositioned in the new B+ model and placed next to the HDMI socket. Micro USB Power Source Connector: This connector is used for delivering 5V power to the board. Thus removing the hassle of connecting the USB hub in order to increase the ports. USB Ports: Similar to model B, model B+ also consists of 4 USB ports. It can provide up to 1Gpixel/s, 1.5Gtexel/s, or 24 GFLOPs of a general-purpose computer. The GPU uses OpenGL ES version 2.0, hardware-accelerated OpenVG API, and 1080p30 H.264 high-profile decode. GPU: It stands for graphics processing unit and is used for performing out the image calculation. RAM: RAM used in R-Pi 3 B+ is 1GB LPDDR2 SDRAM (similar to the previous version) BCM2837B0 is a 1.4GHz 64bit ARM quad-core Cortex A53 processor. Processor: The BCM2837B0 processor is the main component of this tiny board that helps in carrying out a large set of instructions based on mathematical and logical formulas.
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