Hi to all!
Hi
@pastrychef
First of all... This build is awesome! Thank you!
I started this build with an i7 8700 CPU and 16 GB Ram to use it at home and also installed a SYBA FW PCI E Card to upgrade it in the future for Studio use in 2018. Since some months ago my Studio iMac LogicBoard broke, I decided to upgrade my home Hack and bring it to the Studio.
Some months ago I upgraded to an i9 9900k CPU, 64 GB Ram and a nvme m.2 ssd (WD Black) and a new PC case to have all my SSDs via SATA.
At the Studio I am using a Focusrite Pro 40 FW Interface and now when i hook up the Interface and start the PC,
I get a constant modem like, whining sound, sometimes crackling, especially when scrolling with the mouse, through my active Monitors/Speakers and both Headphone outputs.
My current setup is:
cpu: i9 9900k
mobo: Asus Rog Strix z370-g (wifi-ac)
RAM: 64 GB crucial ballstix 3200 MHz
PSU: Seasonic Focus plus gold 550 Watt
SSD: 4x SSD (Crucial/Samsung), 1x Nvme m.2 ssd (WD Black)
GPU: MSI RAdeon Rx 560 4GB Lite
SYBA PCI-E card with Texas Instruments Chip, 2x 1394B & 1x 1394A FW
case: Cooler Master S400 Silencio
As soon as I unplug the FW cable from the PC the Sound is gone. I also tried with my Saffire pro 24 DSP in the Studio, which brings me to the same scenario.
As I tested this setup before buying the i9 with my Saffire pro 24 DSP and the SYBA on the i7, rx 560 at home, and there were no problems, I am really surprised and ask myself what it can be, since the only thing I changed in this build is the cpu, the ram, the m.2 nvme, the case and the cpu cooler (Noctua)?!
I already tried to figure out if it is a grounding problem in the Studio, but every combination of plugging all power into one socket, different sockets, sockets in another room and combinations of it etc. did not help.
I tried also different FW cables with no change.
I also killed the ground on the socket of my audio interface with tape, no change. Today I will try it on the PC.
I also dactivated my RX 560 on the PCI slot and activated iGPU via BIOS and also changed the slot placement combo of SYBA and RX 560 with no positive result. I deactivated C-States in BIOS with no result, since I've read it on some forums.
I searched the entire Internet and found a lot of threads with similar problems on tonymacx86.com , gearspace.com and a lot of other places. But most of them had the problem only through speakers and not in the headphones. Until now I did not try to record anything, cause the sound is really annoying and already starts before the bootloader (clover) and MacOS starts, but then gets louder.
Maybe someone has a hint or can help me! I am a little bit despaired at the moment.