Overclocking
The BIOSTAR B550GTQ showed good headroom for overclocking, at least in short test runs. I was able to achieve 4.41 GHz at 1.35 V core voltage. Longer runs were not possible, causing either throttling or instability.
I am also conducting a memory timing test. This is a pass/fail test where I load the DRAM Calculator "fast" preset for my Trident Z Neo kit (Samsung B-die). A board receives a pass if it can run through three loops of MemTest64 with no errors. Partial credit will be given to a board that can get into Windows, but fails MemTest64. As validated by my MSI X570 ACE motherboard, this CPU and memory combination with exactly these sticks can run without errors at these settings.
The BIOSTAR B550GTQ was able to reach 4000 MHz stable at XMP timings and voltages on my Trident Z Neo kit.
For the timings test, the BIOSTAR B550GTQ was not able to boot into Windows.