AB350M Pro4 freezing at reboot

trolleyfan wrote: Hi all, I built my system a couple of months ago and recently I have started experiencing a strange problem. Whenever I try to reboot my computer (from Windows, from BIOS setup, does not matter), it starts rebooting, restarts the fans at max speed, then turns them to silent mode (as configured in BIOS) and freezes there with no output from the GPU. Fans keep on spinning at low ROM and nothing is happening (I did try waiting for about 10 minutes) until I hold the power button for several seconds to turn the machine off. I don't have a reset button on my case, so I turn it off, wait for about 15 sec or more, and turn it back on. It then boots just fine. If I turn it on immediately without waiting, it won't boot (will repeat the same sequence - start the fans at max speed, turn them to silent mode, freeze). Other than that, the computer is working flawlessly. Here's my config: AB350M Pro4 (current 3.10 BIOS) Ryzen 5 1600 Samsung SSD 960 Evo M.2 250GB (from the QVL list) G.Skill Fortis 16GB DDR4 16GHT Kit (2x8GB) F4-2400C15D-16GFT (from the QVL list) ASUS GeForce GTX1050Ti-DC2O4G Be quiet Pure Power L8 400 Watt Nothing is overclocked. Here's what I have tried: Setting RAM to 2133 MHz Removing each RAM stick and leaving just one of them Putting RAM sticks into different slots Updating BIOS from 3.00 to 3.10 Cleared CMOS twice using the jumper and by taking the battery out Nothing seemed to have any effect except clearing CMOS - it helped for a while and 2 or 3 reboots are going well and then it starts happening again (even if I don't change any BIOS settings). So I have a feeling that this problem has something to do with the motherboard/BIOS/CMOS/whatever, since clearing CMOS solves it for a while. Any advice?

Strange situation, difficult to know what is the cause.

Does the PC behave the same way with an earlier UEFI/BIOS version?

What version of Windows are you using?

You said this behavior started recently, so something changed that is now causing the issue. Do you install the GPU's driver yourself, or is it done by Windows update? Your GPU's trouible shooting information includes problems like you describe related to the driver:

https://www.asus.com/support/FAQ/1016113

Have you tried remounting the GPU? That includes both fully seating it in its slot with the slots locking tab open, and then closed when the card is in the slot. Your GPU uses power only from the PCIe slot, correct? So its seating in the slot is critical.

Securing the card to the PC case is also important, be sure the card is perpendicular to the board and not leaning to one side or the other. You can see that by looking at the card's IO ports compared to the metal part of the PC case between the open PCIe slots on the case. The IO ports should be parallel to the metal part of the PC case, with the card secured to the PC case. But it is possible that the card can be pulled or moved somewhat out of the PCIe slot when tightening the screws to the PC case

There is one thing that has an affect that seems consistent, turning off the PSU and letting it sit for 15 seconds. If you have another PSU, I would try using it to test if their is any difference.

Ryzen boards have a long, slow POST time, before Windows begins to load. That's why you hear the fans running at full speed for a while before the board's fan speed control becomes active. My Ryzen X370 board does the same thing.

Was a fix found for this? Mine just started doing the same thing

Unfortunately I still have not identified which part of the system is responsible for the issue. More and more problems are popping with my build. At some point sleep mode stopped working, I started getting random freezes and reboots, etc. A certain part of my system is clearly degrading, but I'm not sure which one.

Have the same bug.

Edited by B08AH - 22 Jan 2018 at 3:34am

FWIW I'm getting this problem and I'm using a sata ssd so it can't be M2 related.