Probably a fault with the old GPU, the rx480
When the problem happened on the XMP-5600 case
- I have tried to remove rx480 and use only igpu of CPU, but the problem still exists.
- I have also tried to remove all unnecessary devices (have only MB+cpu+ram, no HD, no rx480) to check if I can enter BIOS. then the display still has no signal (cannot enter bios).
- Sometimes bios can enter recovery mode with itself, but sometimes not. The final solution is to reset CMOS.
For more information while using in native mode-4800
- Overall use is good, windows is stable, and it has never had BSOD.
- There is something strange about the sleep state. I found the LED of the cooling CPU fan (connected from D_LED2 on MB) is sometimes turned off, and sometimes not turned off. (while the cooling fan is always turned off). However it does not affect to the wake-up process, I can always wake up to Windows.
p.s.
- I have already checked the RAM kit with a memory test of Windows, and no defect was found.
- Someone said that the problem is at cooling RGB led, he recommended removing the D_LED2 line. I have tried but the issue still exists.
- I've been wondering about the rx480 driver issue as well. However, if I can get into Windows, in the device manager, I can see both VGA adapters with good properties in both 4800 and 5600 modes. The problem with 5600 is that I can't restart it (the problem will happen instantly after restart (except shut down) and must be fixed by clearing CMOS only).
- Now I feel like I'm forced to use it in 4800 native with default bios mode, I can use it smoothly. There's just a slight weirdness about the sleep state as I mentioned above.