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Problem description: I recently changed out my EVGA 750 G1 power supply for a G2 when the fan started failing. Everything is wired up and the computer is functioning, but now the motherboard begins to emit a persistent electrical hiss/buss a few seconds after the computer powers on. The sound continues until shutdown. I've checked all the fans and the PSU itself and narrowed it down to the mobo - it sounds to be coming from somewhere around the CPU power supply socket plug, specifically. This was my first time installing a PSU and I'll admit I was a little clumsy, but I made sure to keep myself grounded and touch the actual motherboard as little as possible. Is this just coil whine after the installation of the new power supply, or something more severe? Attempted fixes: Checked all fans, powered on the PSU without the motherboard. Recent changes: Aside from the new PSU and new cables, nothing. -- Operating system: Windows 10. CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor CPU Cooler: CRYORIG M9i 48.4 CFM CPU Cooler Motherboard: ASRock Z170 Extreme4+ ATX LGA1151 Motherboard Memory: G.Skill NT Series 16GB (2 x 8GB) DDR4-2400 Memory Storage: Samsung 850 EVO-Series 1TB 2.5" Solid State Drive Video Card: MSI GeForce GTX 980 Ti 6GB Video Card Case: be quiet! Silent Base 800 (Black) ATX Mid Tower Case Power Supply: EVGA SuperNOVA NEX 750W 80+ G2 Fully-Modular ATX Power Supply Optical Drive: Asus DVD-E818AAT/BLK/B/GEN DVD/CD Drive e: also, in case it's helpful, here are the voltages I took with CPUID under normal load: Hardware monitor Nuvoton NCT6791 Voltage 0 0.59 Volts [0x4A] (CPU VCORE) Voltage 1 1.70 Volts [0xD4] (VIN1) Voltage 2 3.34 Volts [0xD1] (AVCC) Voltage 3 3.33 Volts [0xD0] (3VCC) Voltage 4 1.02 Volts [0x7F] (VIN4) Voltage 5 1.02 Volts [0x7F] (VIN5) Voltage 6 1.02 Volts [0x7F] (VIN6) Voltage 7 0.00 Volts [0x0] (VIN7) Voltage 8 0.59 Volts [0x4A] (VIN8) Voltage 9 1.29 Volts [0xA1] (VIN9) Voltage 10 1.02 Volts [0x7F] (VIN10) Voltage 11 1.70 Volts [0xD4] (VIN11) Voltage 12 1.02 Volts [0x7F] (VIN12) Voltage 13 1.22 Volts [0x99] (VIN13) Oxxidation fucked around with this message at 23:56 on Feb 18, 2017 |
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Feb 18, 2017 23:47
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| # ¿ Apr 29, 2024 12:33 |
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Re-checked my connections, all cords were snakes. Was bit repeatedly by snakes. Will return PSU and leave two-star review on Amazon (one extra star because snakes were non-venomous). Joking aside, I just took another look around the case, saw everything looking OK, then did another pass at Google and decided to turn off C-States in the BIOS. That seems to have eliminated the noise - guess it was coil whine from the CPU. Will there be any long-term consequences for this, or do you think I'm good?
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Feb 20, 2017 04:22
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