C4

ODROID-C4:

Representing the next generation of single-board computers, the ODROID-C4 surpasses its predecessor, the ODROID-C2, in both energy efficiency and performance. Introduced over four years ago as the world’s first affordable ARM 64-bit computer, the ODROID-C2 set the stage for innovation. Now, the ODROID-C4 takes it to the next level.

Key Features:

1. Advanced CPU: The ODROID-C4 features an Amlogic S905X3 CPU, which comprises a quad-core Cortex-A55 cluster. These A55 cores operate at a steady 2.0GHz without thermal throttling, thanks to the efficient stock heat sink. The result is a robust and quiet computing experience.
2. Enhanced Multi-Core Performance: Compared to the ODROID-C2, the ODROID-C4 boasts approximately 40% faster multi-core performance. This boost ensures the smoother execution of tasks and applications.
3. Improved System DRAM Performance: The ODROID-C4’s system DRAM performance is 50% faster than that of its predecessor. This upgrade translates to quicker data access and overall responsiveness.

Technical information at WiKi : https://wiki.odroid.com/odroid-c4/odroid-c4

Specifications

CPU performance

Dhrystone-2, Double-Precision Whetstone, 7-zip compression benchmark results show the ODROID-C4 system performance is 40 ~ 55% faster than the previous generation ODROID-C2.

GPU performance

The Mali-G31 runs at 650MHz and is ~50% faster than Mali-450MP in ODROID-C2. The Mali-G31 is the first generation Bifrost-based mainstream GPU from Arm. GPU performance was measured with the glmark2-es2 “–off-screen” option.

RAM performance

Why does DDR4 matter? ODROID-C4 DDR4 RAM runs at 1320Mhz. The memory bandwidth is 1.6 times higher than ODROID-C2.

CPU frequency vs performance

Some ODROID users may recall the lower than expected clock speed with ODROID-C2’s S905. We ran a test to confirm the ratio between CPU clock frequency and performance with ODROID-C4.

Thermal characteristics

To check thermal throttling, we ran some heavy CPU and GPU loads together on the SoC and monitored the temperature. We ran the test within a chamber that maintains the ambient temperature at 25°C.

Note that the current thermal throttling point is set at 75°C in the Kernel configuration.

Note that if you put the ODROID-C4 board into an enclosure, you may encounter some thermal throttling issues when the ambient temperature is higher than 20°C and the continuous computing load is very high.

Ethernet

According to our iperf test result, the throughput performance was near 1Gbps.

USB Host

We measured the USB3 transfer speed with a UAS capable SSD. The average ~340MB/s of throughput should be acceptable for many applications. Since four USB host ports share a single root hub, the transfer rate will be lower if you use multiple USB3 devices at the same time.

eMMC storage performance

Sequential read and write speed is over 165MB/s and 125MB/s respectively. 4K random access performance is reasonably fast too. iozone test results are as follows.

Micro-SD UHS performance

Using properly implemented UHS dynamic voltage scaling, the sequential read and write speed is over 70MB/s and 50MB/s respectively.

Cryptography

The ARMv8 architecture supports hardware accelerated crypto extensions for building a secure system. As expected, we could see very decent openSSL performance with ODROID-C4.

GPIO (40Pin Header)

The ODROID-C4 GPIO interface is similar to C2 and fully supports a 3.3Volt interface. This is beneficial for using various peripherals without complicated level shifters as with the XU4’s 1.8Volt GPIOs. Another big improvement is a faster SPI bus interface with a maximum frequency of about 100Mhz. It is significantly faster than the ODROID-C2’s 400Khz software “bit-banged” SPI.

Power consumption

Thanks to the modern 12nm fabricated S905X3 CPU, the power consumption and heat dissipation are relatively very low. Therefore, we can enjoy a quiet and powerful computer with high energy efficiency.

Idle state: ≃ 0.18 Watt
Heavy load state: 3.1~3.3 Watt (stress-ng –cpu 4 –cpu-method matrixprod)
No cables are attached except DC power input and USB-UART debug console cable.

Note:

• The power consumption in “IDLE” is measured when a device is not being operated for 5 minutes since the CPU governor is set to ‘performance’.
• The measured power consumption is not absolute and could vary in certain conditions.

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