Allwinner A13 is SoC with build-in ARM Cortex A8 CPU ARM Mali 400 GPU and Allwinner Cedar Engine VPU, which is also named R8 now

Overview

A13
Manufacturer	Allwinner
Process	55nm
CPU	ARM Cortex-A8 @ 1Ghz
Extensions	NEON, VFPv3
Memory	DDR2, DDR3 (max 512MB @ DDR800)
GPU	Mali 400 MP1
VPU	Cedar Engine
Connectivity
Video	LCD
Audio	Mic, Headphone
Network	-
Storage	NAND (max 2 * 32GB), SD Card 3.0
USB	2 (1 HOST, 1 OTG)
Website	Product Page

Main components of the A13:

CPU: Cortex-A8 1GHz (ARM v7) Processor which have both VFPv3 and NEON co-processors:
- FPU: Vector Floating Point Unit (standard ARM VFPv3 FPU Floating Point Unit)
- SIMD: NEON (ARM's extended general-purpose SIMD vector processing extension engine)
GPU: Mali400
VPU: Cedar Engine (Video Processor Unit for audio and video hardware decoding or encoding)

The A13 is a cheaper version of the A10 which lacks HDMI-transmitter and SATA-controller, as it is primarily targeted towards tablets. The A13 also lacks G2D and therefore needs to rely on NEON code for 2D acceleration.

The R8 is a rename of A13, and primarily targeted towards low-budget IoT devices.