SOC: Amlogic S905Y4-B
CPU: ARM Cortex-A35 (4-cores; 64-bit; max core speed 2 GHz (?))
GPU: Mali-G31 MP2
RAM: 2GB DDR(?)
Storage: 8GB EMMC
OS: Android 11 (32-bit)

Sources:

• First-hand observation
• This AVSForum post

SOC: Amlogic S905Y4-B
CPU: ARM Cortex-A35 (4-cores; 64-bit; max core speed 2 GHz (?))
GPU: ?
RAM: 2GB DDR3
Storage: 32GB EMMC
OS: Android 11 (32-bit)

Sources:

• GTMedia Store
• First-hand observation
• This AVSForum post

SOC: Amlogic S905Y4-B
CPU: ARM Cortex-A55 (4-cores; 64-bit; max core speed 2 GHz (?))
GPU: ?
RAM: 2GB DDR?
Storage: 4GB EMMC
OS: Android 11.0.2 (32-bit)

NOTE: This STB apparently has an HDMI 2.1 output port but may currently be limiting connections to HDMI 2.0.

Sources:

• First-hand observation
• This AVSForum post