Issues with 12V rail problems on Corsair HX1050?
Issues with 12V rail problems on Corsair HX1050?
Hi, here are my PC specifications:
Corsair HX1000 1050w
CPU I7-12700k
RTX 2080 super Waterforce
Motherboard is an Asus ROG Strix Z790
Corsair Vengeance 16GB ram kit
Corsair MP510 M.2 drive
Samsung 512GB M.2
Cooling system is a custom watercooled loop
I’m facing problems where the system randomly shuts down to a black screen, and sometimes one of the six-pin connector lights on the GPU stays lit. Other times it crashes completely, rebooting straight into Windows. I also notice the RGB on the RAM and motherboard illuminates, but not the GPU, and there’s no fan spin or pump operation. The PSU fan spins briefly for 2-3 seconds before stopping, and both monitors show no output. There were no diagnostic LEDs flashing.
I attempted to run benchmarks, and the moment I started the system it would reboot again. Recently, I observed the 12V rail dropping significantly—idling at 11.424V, fluctuating between 11.424V and 11.724V. It fell as low as 10.928V for a short time before recovering. Under load, it quickly returned to 11.524V, fluctuating up to 11.808V and 11.904V.
After disconnecting all power connections, I tested the PSU with a tester and everything appeared normal. After reconnecting, the 12V rail stabilized at 11.904V. I plan to rebuild the system in the coming days and am uncertain whether a new PSU is necessary, since I’ve owned one since 2016 and it was a refurbished unit from Scan. The PC is connected directly to a wall outlet.
I've reviewed the temperatures and observed that during idle or light tasks, the CPU stays at 30 degrees and the GPU at 33 degrees. Under heavier load, the CPU reaches 63 degrees while the GPU is at 55 degrees. Voltages have been tracked via BIOS Hwmonitor and OCCT, with all readings consistent on the 12V rail. I've performed MEMTEST through BIOS without any errors detected. Additionally, I'm testing two separate 8-pin connectors from the PSU to the GPU. All connectors are properly seated in the PSU. The unit appears to be up to 14 years old; it was a refurbished model when purchased from Scan Computers in May 2016.
Get a new PSU, it's eight years old and refurbished. For a high-end system, eight years is sufficient, but those 2080 models can experience power spikes that might trip the PSU. I had an 2080 Ti that would cause the PSU to shut down like a reset button was pressed.
It looks just like what I have. It's time to switch to a different PSU, so I can test other machines. My old CX600 isn't working well enough for testing anymore, and since I'm moving my rig to a new case, I'll add another PSU to my list. Thanks for the info!