08-02-2019 03:31 AM
03-30-2021 01:03 PM
cudyyy wrote:
Same here, my PCH fan is always between 2000 (at the first start of my pc) and somewhere idles around 2800 afterwards. While gaming, 3100rpm is pretty normal 😄 As far i can remember, the problem was not since the beginning. The high rpm madness came somwhere early 2020?
03-31-2021 11:46 PM
primeshooter wrote:
I've had this issue for a while. In the bios, it's called a PCH fan, but in Q fan in the bios it's called an M.2 fan but even although it lets you tweak the graph it does nothing to the fan speed ( please try it ). In fan xpert 4 in windows it doesn't recognise or let you adjust any PCH fan only M.2 and it won't recognise it. Result? Fan at 3000 yet temps 30 degrees. No need, but I cannot change it! Please submit a ticket as they don't believe me I think!
04-01-2021 06:09 AM
04-01-2021 12:57 PM
Sinistercr0c wrote:
@primeshooter - I don't believe the PCH fan header has ever been addressable in BIOS. The M.2 fan is a separate header on the motherboard (see screenshot of the manual below):
04-01-2021 12:59 PM
primeshooter wrote:
You are not getting what I mean. I used to be able to slow the chipset fan to what I wish - in previous bios releases in the bios it was called the M.2 fan * it's right next to the m2 slots) and playing about with the graph in the bios changed it's speed. It's not called the m.2 fan now. It's called the PCH fan in the bios and I cannot affect it's speed, it's running at 3000 needlessly as the temps are low.
04-01-2021 02:24 PM
schmak wrote:
There was a custom bios that exposed that setting and the spread spectrum, Asus AFAIK never released a bios with the former exposed. The latter is now standard.
04-02-2021 11:52 AM
04-05-2021 06:23 AM
primeshooter wrote:
I edited my post can you go back a page and look at the screen shots. Also, what do you mean here, not following you>?
04-05-2021 08:37 PM
schmak wrote:
I think others explained it, you are mixing up the M.2 fan header with the PCH, the PCH was never controllable. Some folks have put out custom bioses that allow you to control it (the code is in the BIOS, just hidden in the UI). I wouldn't suggest loading a custom bios though. If the fan is loud or you are getting too hot on the PCH you might need to replace it. I know some folks have put on smaller 60/40mm noctua fans there and it helped a ton.
04-02-2021 12:37 PM
primeshooter wrote:
I've explained this so many times let me try again. I used to be able to slow the chipset fan to what I wish - in previous bios releases in the bios it was called the M.2 fan * it's right next to the m2 slots) and playing about with the graph in the bios changed it's speed. It's not called the m.2 fan now. It's called the PCH fan in the bios and I cannot affect it's speed, it's running at 3000RPM needlessly as the temps are low, I'm talking like 20 degrees chipset temps etc.
In Fan Xpert 4 (ASUS official software for win 10 which I use), up until the last few bios releases, in that software, it shows the M.2 fan and it had a graph I could play with. Doing this, changed the speed of the chipset fan. How do I know this? Because I could hear it! Now, with the last few bios releases (don't know exactly which one) in fan xpert 4, the M.2 fan says N/A. It's clearly changed something. If I click the fan speeds in this software I see the PCH fan spinning at a stupid 3000RPM and it's not adjustable! This is the issue plain and simple. Please tell me you understand this now? I have attached pictures - a few months ago what I am telling you is that I could adjust that M.2 fan in windows and in the bios to slow it down, now it is uncontrolable. See the N/A here, the the PCH stuck at 2500 (it's usually at 3000).