Results 1 to 4 of 4

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

  1. #1
    Join Date
    Feb 2010
    Location
    Cleveland OH
    Posts
    76
    Thanks Thanks Given 
    6
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    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

  2. #2
    Join Date
    Oct 2017
    Location
    Grand Junction, CO
    Posts
    2,041
    Thanks Thanks Given 
    115
    Thanks Thanks Received 
    64
    Thanked in
    57 Posts

    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; 10-12-2019 at 03:05 AM.

  3. The Following User Says Thank You to ashiekh For This Useful Post:

    BTRY B 529th FA BN (10-11-2019)

  4. #3
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    16,210
    Thanks Thanks Given 
    544
    Thanks Thanks Received 
    309
    Thanked in
    224 Posts

    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.

  5. The Following User Says Thank You to Jon Gerow For This Useful Post:

    BTRY B 529th FA BN (10-11-2019)

  6. #4
    Join Date
    Sep 2010
    Location
    New Jersey, USA
    Posts
    1,382
    Thanks Thanks Given 
    910
    Thanks Thanks Received 
    20
    Thanked in
    19 Posts

    Default

    Motherboard?
    Core i7 4770K @4.3GHz + iGPU | GA-Z87X-UD4H | 2x8GB Crucial Ballistix DDR3@1600MHz
    Prolimatech Armageddon heatsink w/ 2 x 140mm NF-A14 PWM fans
    Samsung 840 Pro 512GB SSD | WD Black 4TB file disk | WD Red 3TB backup disk
    Fractal Design Define R5 case w/2 x NF-A14 ULN front fans | no exhaust fan; grill removed
    PSU Seasonic X-650 Gold

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •