A look Inside

Taking the ASRock 4X4 BOX-7840U apart is quick and easy. Much like its siblings, you will need to remove the four screws on the bottom, which will allow you to lift the bottom plate off, giving you the ability to install system memory, M.2 SSD, SATA HDD/SSD, and so on.


With the system open you will find the MediaTek RZ616 Wi-Fi module pre-installed and ready to go, you will need to remove it if you plan to do a complete disassembly. To make this easier loosen the screw holding the plastic M.2 SSD bracket in place you can then rotate it to get the Wi-Fi antenna wire out of the way. After that you can remove the Wi-Fi module and let it sit off to the side still attached to the antenna wires.


Now un-clip the black plastic rear I/O plate along with the two screws that hold the mainboard in place. Once both are taken care of the mainboard can be popped out.


With the system pulled out, you now have access to the CPU cooler and fan, with the fan model number: BSC0805HA-00, which is made by Delta Electronics. There is also a plug on the side for the CMOS battery. Beyond that, you have a copper cooler with a small copper radiator which should be sufficient for the Ryzen 7 7840U's 28 W TDP . However, the unit also has a performance mode that boosts the TDP higher and thus delivers improved performance.