Board Technical Specifications Comparison

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Acme Systems FOX Board D27 vs. SiFive HiFive Unleashed

	× FOX Board D27	× HiFive Unleashed
Manufacturer	Acme Systems	SiFive
Price	$ 39.0	$ 999.0
SoC	Atmel SAMA5D2	SiFive Freedom U540
CPU	1× ARM Cortex-A5 @ 500 Mhz	4× SiFive U54 @ 1.5 Ghz
Embedded MCU	-	1 x SiFive E51
RAM	256.0 MiB DDR3L @ 166MHz	8.0 GiB DDR4 with ECC
SPI flash	128 Bytes, bootable	-
eMMC	-	1 × soldered
SD	1 × bootable: True	-
USB	2 × host ports 1 of which are Type-C 1 of which support USB-OTG	-
Ethernet	1× 10/100	1× 1 Gbps
GPIO	66	40
ADC	12	-
DAC	12	-
I2C	4	1
SPI	2	1
UART	4	1
Dimensions	56 mm x 85 mm	-
Temperature	-25.0°C - 85.0°C	-
Software	Linux: True (mainline)	Linux: True