PSU Problem
PSU Problem
Hello,
I own a Corsair AX1200i from 2015. This week the MOBO began noticing a power surge. Initially, after several attempts the PC would start up normally without any noise. However, the situation has worsened over time. It requires increasingly longer attempts before it powers on, occasionally displaying a power surge warning. On some tries it starts up fine, then fails to activate completely, showing no error messages. The GPU, cooler, keyboard, and CPU power indicators all behave inconsistently.
I have performed thorough cleaning, double-checked all cables, confirmed the wall outlet is functional, verified the surge protector is working, and ensured all peripherals operate correctly.
Here are the specifications:
- ASUS X99 Deluxe MOBO
- CPU: Intel i7 5970k 3.5 GHz (no overclock)
- RAM: Corsair Vengaence 4 x 8 GB → 32 GB
- GPU: EVGA GEFORCE GTX 980/PCIe/SSE2 4GB
- Corsair Liquid cooler with 2 fans
- 1 DVD R/W SATA drive
- 1 120GB KingsTON SATA SSD
- 1 Corsair MP 400 1 TB NVMe M.2 (direct connection)
- 1 WD1 TB HDD (data) SATA
- 1 ST 2 TB HDD (first backup) SATA
- Keyboard: k95
- Mouse: M95
- WACOM tablet connected via USB
Unless someone here shares additional insights I haven’t considered, I intend to purchase a Corsair RMx850 since it seems unnecessary for my setup.
Thank you in advance for any advice or assistance.
UPDATE: Despite my efforts, the issue persists—showing up as CPU overvoltage rather than power supply failure. The deep clean, disabling the chassis intrusion monitor, and resetting CMOS have not resolved it. It still takes numerous attempts before the PC powers on, and once it does, everything functions silently without any voltage or temperature warnings.
Your PSU comes with a 10-year warranty. You might want to reach out to Corsair for a replacement under RMA.
Using a very powerful PSU isn't inherently bad; it will only draw the power it needs, no more.
If your power supply isn't stable, consider purchasing a UPS to smooth out any fluctuations.
I'm not in the US, sending it back and getting it again might cost more than buying an RMx850 because of import taxes. And I need the machine to be working, at least so it functions even after the frustrating wait until it turns on.
The power source (wall) was checked, it's fine.
Updated: I haven't resolved the issue yet, but it seems to be linked to the CPU rather than the PSU. The deep clean I performed—switching off the 'chasis intrusion' monitor (which doesn’t exist for me), and resetting the CMOS—caused the error to shift to "CPU overvoltage error." It still takes many attempts for it to appear, and even when it does, the PC starts normally without any voltage or temperature errors.
The voltage control for your CPU is managed by the motherboard, making it the probable source of the issue.