Having weird issues when trying to boot

AnnoFT · August 17, 2020

Hello everyone,

I have to reinstall my graphics card to another PCIE slot every time I boot, or it won't get into bios.

This problem first happened yesterday, and is happening every time I try to boot now.

The motherboard shows an error code AE, which by the manual means "Boot to legacy OS".

A several seconds later the display will become A5, which by the manual means "Issue reset during SCSI initialization process".

I searched for information on both and there were sojme solutions that didn't work for me.

Here are the things I tried that didn't help:

1.clear cmos

2.replace RAM

3.uninstall graphics card and put it back in the same slot

At this point I was just randomly guessing if there's something wrong with the PCIE slot of my graphics card, so I installed it in another slot.

I got to OS and everything went noemal. But the other slot also works normally when I plug the card into it afterwards.

I think this might be a problem with my chassis. As the attached photo shows, there is a seam between the backplate? of the graphics card and the chassie, which means I have to bend my chassis to install the screw.

My guess is that maybe when I have the screws on, the chassie will add force to the card and try to pull it out from the PCIE slot, resulting in a bad contact and that's the reason of my issue.

But I'm not sure because I can have the screws on and the pc still works normally.

Here are my specs:

MB: Aorus X399 Gaming 7(BIOS ver F12)

CPU: Threadripper 1950x

RAM(now insatalled): GSkill f4-3200c16q-64gtzsw

RAM(before replacement): Corsair Vengance LPX 2*16GB 3200 C16

Graphics: MSI GTX1080Ti Gaming X 11G

Thanks for reading all this. I appreciate any possible help.

AnnoFT · August 17, 2020

17 minutes ago, Alex Ushigome said:

GPU should always be mounted to prevent it from moving around and losing contact. Is the motherboard mounted correctly?

Thanks for your reply.

All screws are in place and I don't see seams between the motherboard and the screws, so it looks fine to me.