Topic: HDSPe AIO gets polluted by MoBo - any remedies?
I've got an AIO (rev. 1.4) plugged into Asus PRIME H270-PLUS (rev. 1.02, BIOS 0808 x64, firmware 22.214.171.1249) with Intel i5-7600T and sadly, I can hear CPU load in earphones - for example opening / dragging windows, moving mouse pointer, encoding video, or compiling my DAW from source... total idling results in silence, on any action taken the noises reoccur.
This irregular high-pitched crackling is already present during the boot, in its very soft volume even before OS starts to boot up, just a little while after that one loud click when PC gets turned on.
I guess it is the motherboard, because on its factory settings the noise was quite heavy, but after I sort of desperately disabled all the power-saving and voltage-changing and whatever settings in BIOS, the noise got a lot quieter and somewhat more tolerable, but is still there!
Disabled settings are:
- ASPM (active state power management), PCH DMI ASPM, DMI link ASPM control, etc.
- Intel SpeedStep
- Intel Turbo mode
- CPU C-States
- CPU SVID support
- on-board audio
- MLC streamer prefetcher
- adjacent cache line prefetch
- SGX SW guard extensions
- TCC offset time window
- IOAPIC 24-119 entries
- CFG lock
- serial port
EPU & performance mode: set to Performance mode
I also don't think it has anything to do with my OS Ubuntu Studio 17.10, because I've already had flawless operation under this OS (with AsRock AM1H-ITX MoBo and AMD 5350 CPU in it, though).
What I could try changing are:
- CPU LLC (load-line calibration)
- CPU graphics LLC (I'm using integrated GPU)
- CPU power phase control
But I'm getting pretty skeptic. And otherwise out of ideas. I've tried swapping PCIe ports also and disconnecting CPU fan (I can go fan-less) - no noticeable changes.
PS: I also miss Out6 signal (that nice subwoofer rumble) in HDSPmixer - it just isn't there, although HDSP-mixer settings are loaded from the same file from my previous OS install and ALSA-mixer settings are also the same. But the noise is far bigger issue now.