Possible they're thinking of certain OC editions of GPUs. Some of them have 2 BIOSes you can switch between with a little slider. Some even 3.
I was under the impression that GPU overclocking, overvoltage and fan curve settings were not persistent across reboots.
Why don’t the OEMs of GPUs aimed at OCing just ship with a BIOS that exposes more tweaks through software though…
I had sleep issues. It was the lowest-end G5. I ended up recycling it.