Question No display after failed post

[MrTeal]

In trying to push timings on my 5800X, I've run into a weird issue where after a failed post I can't seem to get into the BIOS to reset anything. The behaviour was strange though, after a CMOS clear the fans and USB peripherals would act like it had posted, but I had a black screen. At first I would try even taking out the CMOS battery and leaving it for a half hour, but even that didn't solve the issue.

Eventually I tried swapping out the 1080 Ti with a 380, and low and behold I got right into the BIOS. Once I'd set everything back up again I can the put the 1080 Ti back in and it boots fine. Even restarting with stable settings I can enter the BIOS with the 1080 Ti, it's just after a failed post that I don't get display. I've replicated this a couple times with swapping to the 380 as well as an old Fermi NVS card.

Any idea what could be the issue? My Prime X570-P isn't the most convenient overclocking board to begin with, but having to swap out the GPU all the time is driving me nuts.

 

[Kenmitch]

That's weird. Are you talking memory timings or cpu clocks?

 

[inf64]

In trying to push timings on my 5800X, I've run into a weird issue where after a failed post I can't seem to get into the BIOS to reset anything. The behaviour was strange though, after a CMOS clear the fans and USB peripherals would act like it had posted, but I had a black screen. At first I would try even taking out the CMOS battery and leaving it for a half hour, but even that didn't solve the issue.

Eventually I tried swapping out the 1080 Ti with a 380, and low and behold I got right into the BIOS. Once I'd set everything back up again I can the put the 1080 Ti back in and it boots fine. Even restarting with stable settings I can enter the BIOS with the 1080 Ti, it's just after a failed post that I don't get display. I've replicated this a couple times with swapping to the 380 as well as an old Fermi NVS card.

Any idea what could be the issue? My Prime X570-P isn't the most convenient overclocking board to begin with, but having to swap out the GPU all the time is driving me nuts.

I have the same board and very similar issue with 1600AF. What I found out is that when I push the memory beoynd what IMC can handle the board panicks and is stuck with black screen. I found that if I disconnect the cable (DVI or HDMI) from my GTX1080 , reset the CMOS and reconnect the cable, the board will post. It is a weird issue indeed and was driving me crazy for days.

 

[MrTeal]

Yeah, it was pushing the memory timings. I’ll try forcing it to fail and mess around with the cable to see if I can really suss out a best method of recovery that doesn’t involve removing hardware. I’ll probably toss in a panel mount switch and wire the clear CMOS jumper to it as well.

Thanks.