1. Be sure the BIOS is current.
2. The PSU is Dual +12V Rail so these tend to have issues when folk add a GPU. Good idea to swap that first for a new slightly bigger capacity Single +12V Rail model.
3. TEST WITH THE REAR USB PORTS ONLY.
4. TEST on USB 2.0 ports.
5. Power delivery over USB can be iffy on some PCs. Get and test with the usual USB Y cable (doubles up the power available.)
6. Ask the PC maker which set of machine drivers to use. Microsoft will not always get this right.
Run a Speccy report and be sure values 01 and 07 are not reporting high values. If you want others to read this for you, read https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
I seem to have a strange issue with my PC. The devices which are connected to it are randomly getting disconnected, only to be connected again in like a second.
I typically observe the issue when I connect a usb 3.0 drive to the pc and start copying large ammounts of data (direction of data transfer does not matter).
When the copying happens I look at the transfer speeds to/from the usb drive and see that it hovers about 70MB/s then drops to 0MB/s every few seconds.
During those periods when I observe 0MB/s copying speed, sometimes this usb drive disappears from the system only to be reconnected in a second. Sometimes I also see my keyboard and mouse lose power and disconnect also. Even bluetooth mouse sometimes get disconnected during this period (it reconnects in a few seconds, but I cannot move mouse during this periods).
Another issue which happens pretty randomly is when I reboot I see that one of my harddrives is missing (I can sometimes see it as not formatted properly), but when I reboot again the drive reappears. I think this was caused by faulty hard drive, but I've already replaced all of them during few months and the issue is still here.
I've also noticed that hard drive is disappearing more frequently if I connect additional sata hard drive to the PC.
I'm starting to think this is either a faulty motherboard or a psu (will try replacing the psu first).
I'm asking here, because maybe someone had a similar problem and could point out a possibly faulty component which could cause this, or point out what else could I try.
What was done:
Check disk was run on all drives (there were sometimes errors caused by sudden disconnect of a drive, but were repaired, when run again there were no errors).
Hard drives which were thought to be faulty were replaced.
Computer was cleaned inside.
Cpu: Intel Core i5 6600k @3.5 (stock speed, not overclocked),
Ram: Corsair DDR4 2x4GB 2400MHz, CL14, Vengeance
Mobo: Gigabyte GA-Z170-D3H rev. 1.0 (bios F5)
PSU: CoreXStream OCZ-CXS500W
Drive 1 (system): Samsung 850Evo 250GB
Drive 2: Hitachi 2TB (HUA723020ALA641)
Drive 3: Seagate 250GB (ST3250620NS)
Usb hard drive: Seagate expansion 1.5TB - when copying to/from this drive the errors happen more frequently, but the drive itself is perfectly stable on another pc
Hub: Chinese usb 3.0 hub (problem happens with this disconnected as well)
Keyboard: Genesis R33 usb
Mouse: A4tech XL-747H usb
Is there anything I can do to narrow down which component is faulty?
Best regards and thanks in advance