Computer Type: Custom built desktop

GPU: Sapphire RX 5700 XT Reference with Kraken G12 and Thernaltake 240 AIO

CPU: R5 2600X, PBO

Motherboard: MSI b450m Mortar

RAM: 2x8Gb Kingston HyperX Predator 3600C17 running at 3400C14

PSU: Seasonic 750W focus plus

Operating System & Version: Windows 10 64 bit latest build (1904?)

GPU Drivers: 20.1.1, 20.1.3

Chipset Drivers: Latest

Description of Original Problem: So I have put a Kraken G12 and AIO on my Saphire Reference 5700 XT and it's working fine but I want to control fan speed on my radiator using the onboard 4-pin PWM connector. I have an adapter to convert the mini 4-pin to a regular 4-pin PWM connector.

The fans are spinning and also adjust RPM depending on GPU temp. But the RPM in Wattmann just reads 65535 and HWInfo doesnt even list a GPU fan. I connected the original blower fan and it shows the same behaviour so it's not the 4-pin adapter or the fans.

Troubleshooting:

• tried DDUing and installing an older driver (20.1.1) with no improvements.
• I have not modified the BIOS

Is there anything left for me to do or do I have a faulty fan connector?

If it's the fan connector I guess there's a loose connection with the RPM readout wire. What steps can I take to find it?