Originally Posted by Undervolter
Welcome to Gigabyte BIOS hell.
First, the idle fan rpm, is determined by the fan itself. If the CPU is very cool, the lower RPM you will have will depend on the fan you have. You can't modify that. Mine is like 800 rpm, because the fan's specifications are 800-1800 RPM. So 800 becomes the baseline.
The "slope" is how fast you want the RPM to climb, at every increase in temperature. I have it to 2.5, since there isn't more than that. This isn't ideal either, because again, the point in which the fan will reach its max rpm is determined in base on its low RPM (baseline) and temperature increase. For example, in mine, i can't have the fan run at full blast below 50C, because the baseline RPM is too low.
There is no "universal" setting to hit 1200rpm, as you understand. I also wanted my lowest RPM to be like 1200 rpm, but there is no way to do that, unless i start heating up the PC artificially. The only thing you control is how fast the RPM will go up, STARTING from the lowest RPM (idle). Now, if your CPUs temp is a bit hotter due to summer, moving from auto to manual with 2.5 slope, might increase your base RPM, but there is no way that you can set it. It's a matter of luck. For example, mine, in summer goes to 1000 RPM at idle, if i set max slope, compared to auto. But it's because auto uses less slope. You can't control exact speed.
Yes, i have been buying Asrocks for 10 years, i didn't know either how bad Gigabyte BIOS could be. I won't be buying Gigabyte again in the future, unless i read they hired a team of actual software programmers.
Gigabyte's fan control is the opposite of Asrock. In Asrock, you don't have slope and thus no gradual increase in RPM. You have a temp limit. Above this temp limit, the fan will run at max RPM.
Both types of control are kind of crappy.