Computer Type: Desktop
GPU: ASUS R9 270x DirectCU II
CPU: Ryzen 5 1600
Motherboard: GA-AB350-Gaming 3
RAM: LPX Vengeance 2x4gb 2800
PSU: Corsair CX550M / Some BeQuiet 550W non-modular PSU
Operating System & Version: Windows 7 Ultimate x64 on both
GPU Drivers: none on current, current drivers on old system
Chipset Drivers: I assume the one that came with the CD included with the motherboard. I couldn't find it in Device Manager
Background Applications: N/A
Description of Original Problem: I recently ordered a new motherboard (AB350 Gaming 3) with a new CPU (Ryzen 5 1600) and RAM (LPX Vengeance). The motherboard has a little disco before boot where it tests the CPU, RAM, GPU (labelled VGA) and then Boot. For each test, a separate light goes on and if there's no problem the light goes out again. However, with my current GPU (ASUS R9 270x DirectCU II ) the light doesn't go out. With an older GPU (Zotac GTX470) the system boots fine and everything functions. Seems like a clear cut case of a dead GPU, however my R9 270x still works just fine on my older motherboard+CPU+ram combo (P7P55-M with i5 760). When the PSU gets power, the R9 270x shows green lights above where the power is connected and when I try to boot, the fans spin. Not sure if that helps, but I thought I might as well mention it
I tried plugging it into a different PCI-E slot on the motherboard, however a friend said that was a bad idea since only the top one was PCI-E 3.0.
I tried using a brand new PSU (so I've tested it with two, both of which should be plenty to power the new system at 550W since pcpartpicker only rates it at about 350)
I updated my new motherboard's BIOS to the latest version.
I tried changing the PCI-E settings from Auto to Gen3, in case it didn't recognize the R9 270x as gen 3.
At friends recommendation, I tried turning off XMP but it was already disabled by default.
After another person pointed it out, it seems to me this video from JayzTwoCents has the exact same issue I'm experiencing https://www.youtube.com/watch?v=VAzNBtCiFws
I have heavily the same issue on my nVidia GPU on AB350 chipset (Gigabyte GA-AB350-Gaming 3).
The issue only surfaces when I try to update my UEFI to newer version, which would have newer AGESA - or (supposedly) the completely rewritten AGESA code. My best guess is, that when I'm doing that UEFI update the GPU stops being compatible for some reason. Or maybe the used DDR4-GPU-combo isn't well for the motherboard.
Older version works completely perfectly (already contacted to Gigabyte and ASUS, which is the GPU manufacturer in my case). I'm at a loss as well... I came by this thread trying to figure out what's going on and why.
As it seems we both share the same motherboard, could you try older UEFI version? To me, the ones that work perfectly are F9d and older. F10 or newer and I *might* get the PC to boot one or two times... And lose 100% overclocking capabilities and stability even in normal use at stock!