Khadas VIM1S low-profile SBC features Amlogic S905Y4 quad-core Cortex-A35 SoC

Khadas VIM1S is an upcoming low-profile single board computer powered by an Amlogic S905Y4 quad-core Cortex-A35 processor that’s meant to provide an upgrade to the Amlogic S905X-powered Khadas VIM SBC introduced in 2016, and since then renamed to Khadas VIM1.

Khadas has been teasing two new SBCs: the low-end Khadas VIM1S with S905Y4 SoC, and the most powerful Khadas Edge2 board equipped with a Rockchip RK3588S octa-core Cortex-A76/A55 processor.

Khadas VIM1S Khadas Edge2 package
Khadas VIM1S package (left) vs Khadas Edge2 package (right)

I have received both as you can clearly see from the photo above :), but I’m only allowed to write about information available publicly at this time, so today I’ll introduce the Khadas VIM1S which looks just like the VIM1 board.

Khadas VIM1S

Khadas VIM1S specifications with highlights in bold showing the differences against the VIM1 Pro model:

  • SoC – Amlogic S905Y4 quad-core Arm Cortex-A35 @ up to 2.0 GHz (real frequency) with Arm Mali-G31 MP2 GPU @ up to 850 MHz
  • MCU – STMicro STM8S003 for power management and boot selection (eMMC or SPI flash)
  • System Memory – 2 GB LPDDR4 @ 1176 MHz (vs 2GB DDR3 @ 750 MHz in VIM1 Pro)
  • Storage – 16 GB eMMC flash, micro SD slot (UHS-I), 32MB SPI flash
  • Video & Audio  Output – HDMI 2.1 up to 4K @ 60 Hz with HDR, CEC, HDCP 2.2/2.3
  • Video
    • Decoder
      • H.265, AV1, VP9, AVS2 up to 4Kp60
      • H.264 up to 4Kp30
      • Mmulti-video decoding up to 4x 1080p60
    • Encoder – Software H.264/VP8
  • Connectivity
    • Fast Ethernet port
    • Dual-band 802.11b/g/n/ac WiFi 5 and Bluetooth 5.0 (Ampak AP6256) with IPEX connector and antenna
  • USB – 2x USB 2.0 host ports with 500mA fuses, 1x USB type C port for power and USB devices (no video)
  • Expansion header
    • 40-pin Raspberry Pi compatible header with USB, UART, I2C, ADC, PWM, JTAG, I2S, and GPIOs
    • 30-pin 1.0mm FPC connector
  • Misc – White & red LED, dual-channel IR, power/function/reset keys, header for RTC battery, 4-pin PWM fan header
  • Power Supply – 5V via USB Type-C or 4-pin connector
  • Dimensions – 82.0 x 58 x 13 mm
  • Weight – 27 grams (vs 28.5 grams)
Amlogic S905Y4 power connector FPC IO connector
4-pin power connector on the top left corner, and FPC IO connector on the bottom right corner

The company will provide both Ubuntu 22.04 and Android 11 (with Linux 5.4) images for the board through their OOWOW system that conveniently allows the installation directly from their servers. No MicroSD card or USB cable is needed to flash the firmware.

Khadas VIM1S quick start guide wifi antenna

My board just shipped with a Quick Start Guide, an antenna, and a card pointing to the documentation website. The company did not include any heatsink or fan, even though there are mounting holes for the standard heatsink and a fan header, as I believe the board should probably run fine without a heatsink thanks to the ultra-efficient Cortex-A35 cores.

A quick calculation shows a Cortex-A35 processor (1.78 DMIPS/MHz ) @ 2.0 GHz should deliver 3560 DMIPS per core, while a Cortex-A53 (2.3 DMIPS/MHz) @ 1.5 GHz achieves 3,450 DMIPS per core. That does not give the full story, but I expect the CPU performance to be similar between Khadas VIM1S and VIM1 Pro. The Mali-G31 GPU is much more recent than the Mali-450 GPU used in Amlogic S905X, so I’d expect improved graphics performance and compatibility bearing in mind it’s still a low-end part. Memory bandwidth would have to be tested, but the Khadas VIM1S uses faster memory.

Khadas VIM1S low-profile SBC

MicroSD cards will have to potential to run faster, and the additional 32MB SPI flash enables network boot and the OOWOW system. Khadas probably makes the thinnest SBCs on the market, and the Khadas VIM1S is no exception thanks to the use of a low-profile Ethernet port that may be important for space-constrained applications such as robotics. The only downside compared to Khadas VIM1 Pro is the lack of a hardware video encoder, and instead, H.264 video encoding is done by software.

Khadas VIM1S is now available for sold for $64.90. Khadas VIM1S review is coming in a few weeks first with Android and then Linux.

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9 Comments
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Theguyuk
Theguyuk
20 days ago

Well the S905Y4 has been on sale in TV boxes for quiet a while and elsewhere on your site you have a link to the datasheet. So it is the software that will define this board IMO.

GunterO
GunterO
19 days ago
  • Fast Ethernet port

What is this? 2005? Quite dissapointing.

tkaiser
tkaiser
19 days ago

And all USB ports only Hi-Speed and at least some of them sharing bandwidth since behind an internal USB2 hub 🙂

The software support side (Amlogic 5.4 BSP kernel) looks similarly promising 😉

Axel
Axel
19 days ago

Maybe. But practically it might be sufficient for many usecases. I’ve never really understood what everybody is doing with this boards that requires more speed. There might be load peeks were it is a bit inconvenient, but does it really matter? Otherwise accept that this board is suitable for you. But check the throughput of that board then, marketing happily sells GBit hardware that can’t handle much more than FastEthernet practically.

Cameron
Cameron
17 days ago

The rk3328 has usb3 and gigabit Ethernet with excellent mainline support and double the ram. Unless you need av1 or super efficient cores, the rk3328 has amlogic beat here. Years in advance. For a similar price point, I would add.

m][sko
19 days ago

For Khadas Edge2 can you try mainline linux kernel? (in your review)

Nd D
Nd D
19 days ago

Khadas Edge2 (RK3588S) will be launched on the 20th of September.

Is CNX going to be one of the reviewer?

tkaiser
tkaiser
9 days ago
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