Argus, Speedfan, Smartfan5, BIOS Inaccuracies...

[Daharen]

So I've got 14 Noctua NF-A12x25 PWM fans, all 4 pins. They are attached to my Gigabyte AORUS Master V.1 motherboard, currently on BIOS version F8. My PSU is an EVGA SuperNova T2 1600 W in case it's a rail or PSU issue (I'm not terribly familiar with this stuff). The configuration is:
1 top rear mounted fan going to CPU-Opt 4-pin,
1 bottom mounted rear fan going into SYS1 4-pin, 
4 top mounted fans going to a four way four pin splitter (1 control, 3 dummies) and into the CPU 4-pin,
4 bottom mounted fans going to a four way four pin splitter and into SYS2 4-pin,
2 front mounted fans going to a two way 4-pin splitter and into SYS3 4-pin, and
2 side mounted fans going to a two way 4-pin splitter and into a SYS4 4-pin.

Now for whatever reason when I boot my computer, random fans will not register the right RPM. They'll show weird numbers like 4-5k RPM, or they'll just not appear at all in the BIOS, Smartfan5, Argus, or Speedfan (That is they are there, but registering as though there is no fan), but the fan is spinning, and seemingly at random rates, as sometimes I start it up, and they're going 100%, other times they're going some lower speed, though without any software feedback it's impossible to tell exactly how fast. 

It's not the same fans, some do it more frequently than others (My front fans, slightly more often then the rest, but not much more), and I've checked the specs to make sure they are being provided enough voltage, and it 'appear's the boards is capable of providing adequate power (According to the spec sheet they draw very little wattage, and 'should' be able to be split up to 6 fans per header, which I'm nowhere near reaching). 

I can't figure out what's going on, but I find when I put the computer to sleep and I bring it out of sleep, more of the fans operate, and doing it once or twice I can get it to register all the fans at the appropriate RPMs under accurate control, but it never get's it right on a fresh restart. Restarting control apps also has no effect, whether it's closing Smartfan through Gigabytes App Control Center, closing and reopening speed fan, or Argus, and the BIOS are completely useless since they always miss a couple random fans on restart.

Has anyone had this issue before or knows what to do to help me? I would believe it was just something wrong with the pins if it didn't effect them all at random, and if sleeping and waking the computer repeatedly didn't make them all work again, but that seems to not be the issue given I can do that... Is there a bios voltage control I need to tweak, or something I'm missing here?

[Constantin]

I had a similar issue with the rear fan, i switch in bios from PWM to DC.

[Daharen]

1 minute ago, Constantin said:

I had a similar issue with the rear fan, i switch in bios from PWM to DC.

Can PWM fans be voltage controlled without risking damage?

[Constantin]

1 hour ago, Daharen said:

Can PWM fans be voltage controlled without risking damage?

Do you mean in DC mode?

Absolutely!

[Daharen]

15 minutes ago, Constantin said:

Do you mean in DC mode?

Absolutely!

Sure enough it worked, thanks... Confused why it doesn't work in PWM, but oh well. One fan appears to be operating at a slightly different range than the others, but I'm sure I can figure that out and tweak it in...