How to Install 64-bit BIOS on Sunchip CX-W8

Sunchip CX-W8 is an Intel Atom Z3735F TV box running Windows, but I’ve been informed that originally Sunchip designed it for WeTek in order to manufacture a Linux based mini PC. Unfortunately, they finally gave up once they discovered Intel had no intention to work on HDMI audio support in Linux for their Atom Z3700 series processor despite it working on Android… Intel Compute Stick will apparently use a separate DSP to handle that part (TBC).

Nevertheless, when WeTek saw I had Wintel W8, they decided to share the 64-bit “BIOS” they had worked on for the Linux port. By the way, Wintel W8 and Sunchip CX-W8 allegedly come from two different factories / design houses, so although they look alike, the hardware might be different, and the UEFI firmware / BIOS, I’m about to share may or may not be compatible with Wintel W8, so you may brick it if it is not already bricked…

If you want to install a new version of the BIOS, or possibly unbrick your device (TBC), you can download and extract CX-W8_64-bit_UEFI.tar.7z. You should get three files:

  • H2OFFT-S.efi – H2O UEFI Flash Firmware Tool
  • M64.W8ANNA01.ROM – 64-bit BIOS
  • STARTUP.nsh – startup script

Copy these three files to the root directory of a USB flash drive formatted with FAT32, and insert the drive into one of the USB ports of CX-W8 mini PC. Power on the device, and press the “Esc” key on the keyboard repeatedly (not press and hold) until you see the menu below.Sunchip-CX_W8_BIOS_Installation Now select Boot Manager with the keyboard’s arrow keys and Enter, and select Internal EFI shell.

CX-W8_UEFI_FirmwareAs you press Enter,  the BIOS installation should start.

CX-W8_BIOS_InstallationOne installation is completed, the PC will reboot, and you can install the 64-bit operating system of your choice. I’m also trying to get the 32-bit BIOS for people who want to unbrick their device to re-install Windows.

I have not tried these instructions myself, but I know at least two persons who bricked their CX-W8 or W8 mini PC, so hopefully, we’ll get some feedback soon.

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