SlideDrum

I can now confirm that it is 100% NOT the middle fan of the cooler. I unplugged that fan while the PC was making the sound, and it persisted. Until I turned the computer back upright and with a (relitively) large thud of the PC it stopped instantly. I am still absolutely clueless as to what is going on here.

The fan is basically brand new. Only a couple months old at most. So if it turns out to be this fan, a simple fan swap should fix the issue. That's not too bad.

If that's true then why does it only happen on boot and not under load? And why does it not happen 100% of the time?

For about 4 weeks now every time I start up my PC, I hear what sounds like a cable brushing up against a fan. But it did not happen when I first built the PC about 6ish months ago. All new parts except for the storage drives, ram, and the GPUs. I've had things like this this happen before, and it hasn't been too hard to locate wich cable is touching a fan. But not this time. I have 3 case fans, one in the back, 2 in the front. 2 fans on my CPU cooler, one of wich is completely covered by the headsync. I have 2 fans on 2 graphics cards each. And I have one fan on my power supply. As far as I can tell none of those fans are blocked. After a minute or so, the sound goes away. Usually lining up with when my PC gets booted into windows, but that may just be a coincidence. As far as I can tell my computer's temps are completely normal. It sometimes happens, and sometimes it doesn't. My guess is that depends on the ambient temperature of the room. Wich does vary greatly at times. Anywhere from roughly high 60's to low 80's at the extreme (Fahrenheit) Here are my system specs: OS: Windows 10 home 64bit CPU: Ryzen 9 3900x CPU Cooler: Dark Rock Pro 4 Ram: 32gb X 3200mh (I don't remember the exact model but I don't think that should matter here) Mobo: AsRock X570 Pro4 GPUs: Asus RTX2080ti Dual/ EVGA 970 sc PSU: Power Spec 850w 80+Bronze Case: MAINGEAR Vybe RGB Storage: 978GB Crucial_CT1050MX300SSD1 (SATA (SSD)) 4657GB TOSHIBA HDWE150 (SATA ) 931GB TOSHIBA HDWD110 (SATA ) 953GB INTEL SSDPEKNW010T8 (Unknown (SSD)) 9314GB Western Digital WD easystore 25FB USB Device (USB (SATA) ) Here is a video of me starting up my computer where you can clearly hear the issue: https://www.youtube.com/watch?v=IkU2EH_NkDs Does anyone have any idea of what could be causing that sound and how I can find it?

Anyone else have a ticket for the 1:45 office tour that's willing to share a ride? I'm flying in from Maryland and won't have a car. If someone could give me a ride from somewhere near the convention center and back, I'd be happy to give you some compensation. I'd really rather not have to take a 2 hour bus ride there and back if I can help it. Or does anyone have any other ideas on cheap relatively fast travel?