Question about a converted computer power supply

[zeropointbug]

Yes, there could be pots in there that can be adjusted to a certain degree, maybe .5 - 1.0 volts +/-.

If it's a decent power supply, they can always hold at least 11.8 volts a heavy load, some PSU's are so so stable that they don't even flinch under the most extreme loads.

Post a link to the model you purchased.