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Thread: -5v not lit up on PSU tester, new system doesn't boot

  1. #1
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    Default -5v not lit up on PSU tester, new system doesn't boot

    I just completed piecing together a new machine this afternoon. Upon booting it up, it doesn't. I tested the incoming PSU 110v cable and it is feeding the PSU. Re-seated the ESP and ATX connectors twice on the motherboard and the psu. Still won't boot. Took out an OLD psu tester and the -5v is the only one not lit. This is with the EVGA Supernova 1000w T2 Titanium PSU. This morning I broke down my old X58 rig in which it was installed and there were no problems. Is that the reason it won't boot?
    Attached Images Attached Images
    Rig1: 2009 Seasonic X 650w
    Rig2:
    2016 EVGA Supernova Titanium T2 1000w
    Retired: Enermax 950w Revolution

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    Default

    Modern power supplies don't have -5V


    https://en.wikipedia.org/wiki/ATX#ATX12V_2.x

    "
    ATX12V 1.2
    A relatively minor revision from January 2002. The only significant change was that the −5 V rail was no longer required (it became optional). This voltage was required by the ISA bus, which is no longer present on almost all modern computers.
    "
    Last edited by ashiekh; 2 Days Ago at 03:05 AM.

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    Default

    There is no -5V.

    If the PSU boots one system and not the other, I would venture to guess that the problem isn't the PSU.

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    Default

    Motherboard?
    CPU: Core i7 8700k, HT enabled, all 6 cores OC'd to 4.8GHz, Vcore = 1.24v
    Heatsink: Noctua NH-D15 with one NF-A15 1500 RPM PWM fan
    Motherboard: Gigabyte Z370X Aorus Gaming 7
    RAM: 4x16GB (64GB) Corsair Vengeance LPX DDR4 RAM 16-18-18-36@3200MHz, Vdimm = 1.35v
    GPU: MSI GeForce GTX 1080 DirectX 12 with 8GB 256-Bit GDDR5X
    SSD1: Samsung 840 EVO 500GB TLC; SSD2: SAMSUNG 860 EVO 1TB 3-bit MLC
    HD: WD 500GB (old); Case: LIAN LI PC-7H Aluminum ATX Mid Tower
    PSU: Seasonic Platinum 660W

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