The USB devices are disconnecting unexpectedly?
The USB devices are disconnecting unexpectedly?
This problem has repeatedly appeared in my experience, though I believed I had addressed it before. It occurs whenever I connect USB devices, a mouse, a keyboard, or a microphone. The connection drops unexpectedly, especially during gameplay. Once the devices are disconnected, they stay powered but can’t be reconnected until I physically remove and reinsert them into the back panel. This issue appears to be linked to the motherboard or power supply unit.
I have attempted the following solutions over the last few months:
- Updated device drivers.
- Updated drivers for USB ports and controllers.
- Turned off power management settings on all USB controllers.
- Reinstalled the BIOS.
- Reviewed the BIOS for any relevant USB configurations, though I found nothing.
- Examined the event log following the incident, but the only entry was about me accidentally breaking my Ethernet cable while trying to remove the keyboard.
Interestingly, when connecting through one of the back IO ports, my mouse works fine. The system itself is only about six months old, excluding the peripherals and power supply.
System details:
- Operating System: Windows 11
- CPU: Intel Core i7-12700KF
- GPU: MSI RTX 3080 Ventus 3X OC LHR
- Motherboard: MSI PRO Z690-A WIFI DDR4
- RAM: 48GB Corsair Pro 3600MHz (XMP)
- Power Supply: Approximately 5-6 years old, 850W EVGA Supernova Gold
Peripherals affected:
FIIO AMP/DAC, Blue Yeti Mic, Logitech G502, Logitech G910, Creative Pebble Speakers
The scores on PSU appear acceptable.
Check the voltage tolerances here: https://www.lifewire.com/power-supply-vo...es-2624583
They fall within expected ranges.
Consider testing with only a 32GB RAM setup to determine if performance changes occur.
Run a clean boot and verify any modifications – follow the instructions carefully and avoid disabling any Microsoft services or Windows won’t load properly.
A clean boot can help identify if startup programs are responsible. If it resolves the issue, it likely points to a startup program. Continue testing over several attempts.
it could be the 5-6 year old PSU can't maintain the power needed for your PC under load and disconnects USB if it needs the power for something else.
No real way to test MB, there are 3 tests for PSU but one of them just tests it works, we know that, and another just looks at the voltages in the BIOS which isn't when its under load. You really need a multimeter... and most people don't have one.
is that 3 x 16gb sticks? unless for some reason you only using 3 of a 4 stick set, the non matched stick could be a reason. But it would be an odd one.
Thank you for your prompt response. From your messages, I’m also beginning to doubt the PSU. I was hoping to get more out of it, but it might not be feasible now.
I do possess a multimeter. What should I be checking? I also have HWiNFO, which could provide some helpful voltage readings under load, though I’m unsure what to focus on.
Additionally, the RAM setup includes four sticks: a 16GB package (2x8GB) and a 32GB package (2x16GB). That should work fine.
sticks are only verified to function with other sticks in the set. No assurances that two sets will operate together. With a multimeter, it's important to monitor voltages under load. USB typically uses 5 volts, which could cause a drop. It might be better to check all 3-12, 5, and 3.3-volt ranges. HWINFO isn't as precise as a multimeter; I used to recommend it, but it's known to produce incorrect readings.
Here is the information you provided:
https://www.lifewire.com/how-to-manually...er-2626158
If only. That would have saved a friend of mine a lot of time.
I reviewed the PSU according to the instructions on that link. All 24pin voltages were accurate when the system was off, as expected.
I wasn't sure about the ideal method while the system was running, so I used a molex and an additional set of cpu 4pins plus vga 6pins. I couldn't test my sata cables. The results are listed below (you can trust them, they match the guide):
Power load
24pin (expected v : actual reading)
6pin
4pin
Molex
PSU only
3v:3.33 | 5v:5.04 & 5.14 | 12v: 12.24 & -12.01
N/A
N/A
N/A
System Idle
N/A
N/A
12v:12.24
12v:12.24 | 5v:5.05
System GPU Load (Heaven Benchmarking)
N/A
12v:-12.24
N/A
12v:12.24 | 5v:5.05
Actual load while gaming, Discord, and background tasks
N/A
12v:-12.27
N/A
12v:12.25 | 5v:5.08
I observed my PSU was running in eco mode, possibly overheating. I switched it off.
I wasn't able to replicate the problem during testing. Assuming the issue wasn't resolved by chance, it could point to RAM, heat, or another factor. Let me know if you should have checked anything else.
Thanks!