So I just got home; Memtest completed (all four passes on 11 tests) with no errors, so it looks like the RAM is fine.
19 hours ago, Jurrunio said:
default voltage is higher because it's also running higher clock speed and need that voltage to stablize.
That makes sense. Seeing as the memory passed, I just tested your suggestion of reducing the CPU to 3.0GHz and on restart it seemed to lock up on a blank black screen. But after a CMOS reset, and a second attempt where I also manually adjusting the core voltage to 1.3V and it's made it to Windows and booted. So I'm not sure exactly what's going on.
Maybe it's hitting a thermal issue? But the temperatures reported by the BIOS as like mid 30's, and even during Memtest topped at I think 57.
I'm currently updating the Chipset drivers, and hoping that makes a difference, but we will see I guess.
EDIT ~ For posterity's sake, here is how I fixed it.
Down-clocked the CPU (via setting the ratio to 30) to run at 3.0GHz, and defined the VCORE max to 1.3V rather than an AUTO setting.
- This allowed the machine to be stable enough to make it into Windows.
After logging into Windows, I downloaded and installed the newest Chipset drivers from AMD, and updated all other Radeon software.
- I also made sure to be running on the AMD balanced power plan option.
- Incrementally adjusted the CPU ratio (32, then 34, and finally 36) and the VCORE max (1.3V, 1.325V, 1.35V) until the processor was back to stock speeds.
The machine has been happily running for 10 + hours now, and passed some CPU stress tests from OCCT. So I'm fairly confident that everything is back to normal.