Amlogic S905X5M is an update to the Amlogic S905X4 quad-core Cortex-A55 SoC with a higher 2.5 GHz CPU clock and a new generation Arm G310 CPU that delivers up to close to three times the performance of the Mali-G31 MP2 GPU for more advanced and smoother HDR user interfaces.
The S905X5M and S905X4 share the same video decoding capabilities, notably AV1 and H265 up to 4K 75fps, but the new S905X5M drops support for H.265 1080P 60fps video encoding, only keeping H.264 1080P 30fps. One of the new features is the inclusion of an NPU designed specifically for Super Resolution enabling video upscaling with better image quality. You’ll find the differences between the Amlogic S905X5M and S905X5 processors in the comparison table below.
Amlogic S905X4 Amlogic S905X5M
| CPU |
Quad-core Cortex-A55 up to 2.0 GHz
|
Quad-core Cortex-A55 up to 2.5 GHz
|
| GPU |
Arm Mali-G31 MP2
|
Arm Mali-G310 V2 with HDR UI support
|
| Neural network accelerator |
N/A
|
inline AI-SR (AISR2)
|
| Memory |
32-bit DDR3/3L/4, LPDDR3/4
Up to 4GB, DDR3200 |
16/32-bit DDR4/LPDDR4 up to 4GB, DDR3200
|
| Storage I/F |
eMMC 5.0, NAND Flash, SD
|
eMMC 5.2 with HW CQ & inline encrupt, SLC/QSPI NAND Flash, SD
|
| Video Output |
HDMI 2.1b 4Kp60 output with ALLM, eARC, CVBS
|
HDMI 2.1b 4Kp60 output with ALLM, eARC, QMS, VRR, QFT,
SBTM, CVBS. |
| HDR | HDR10/10+, HLG, Dolby Vision(Opt), TCH PRIME |
HLG/HDR10/ 10+ Dolby vision
|
| Audio |
Stereo DACs, S/PDIF In and Out, 8-ch PDM, 12-ch I2S in, 12-ch I2S out
|
Stereo DACs, S/PDIF In and Out, 4-ch PDM, 8-ch I2S in, 8-ch I2S out
|
| Video Decoding |
4Kp75 10-bit: AV1, H.265, VP9, AVS2; 4Kp30: H.264
|
|
| Video Encoding |
1080p60 H.265/1080p30H.264
|
1080p30 H.264
|
| Voice & Audio Processing |
VAD, ASRC/EQ/DRC, HiFi4 audio DSP
|
VAD, ASRC/EQ/DRC
|
| DRM & CAS |
Widevine, PlayReady, VMX, TKL C2: Irdeto MSR4, Nagra NOCS3.2, NDS NSK2, VO
|
Widevine, PlayReady, VMX, TKL
|
| Ethernet |
Gigabit Ethernet MAC, and 10/100M PHY
|
|
| USB and PCIe |
1x USB 2.0 OTG + 1x USB 3.0 or PCIe v2 + 2x USB 2.0 (OTG. Host)
|
2x USB 2.0 (OTG, Host), USB-C CC
|
| Crypto Engine |
AES, TDES, SHA-1/SHA-2/HMAC, RSA
|
AES, TDES, SHA-1/SHA-2/HMAC, RSA, ECC
Crystal-Dilithium PQC engine |
| DVB |
4x Transport Stream (TS) inputs, ISO7816 smart card standard
|
|
| Package |
14x14mm BGA
|
13.3x11mm BGA
|
| Manufacturing process |
12nm
|
6nm
|
Amlogic S905X5M block diagram
The Amlogic S905X5M adds some HDMI 2.1 features that deserve an explanation:
- QMS (Quick Media Switching) – A source device can instantly switch its content’s resolution or frame rate without any display blackout, for example, when switching from 60 Hz to 24 Hz to watch a movie.
- VRR (Variable Refresh Rate) – Syncs up source and display with continually changing refresh rate, up to a frame-by-frame basis in order to reduce or eliminate interaction lag, stutter, and tearing.
- QFT (Quick Frame Transport) – Each video frame travels faster from the source even though the source does not increase its frame rate. This reduces lag for gaming and real-time interactive interfaces
- SBTM (Source-Based Tone Mapping) – Enables the source to send a video signal that takes full advantage of a specific display’s HDR capability by adjusting its output to take better advantage of each display’s features.
The Amlogic S905X5M also loses some features such as TCH PRIME DRM, the HiFi 4 audio DSP, and the USB 3.0/PCIe Gen2 interface. The latter is unlikely to be an issue for TV boxes and set-top boxes, but it’s disappointing for alternative use cases like single board computers.