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Thread: GTX 480 Problem

  1. #1
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    GTX 480 Problem

    Hi,

    I bought a new EVGA GTX 480 in mid march and have been having more than a few problems with it.

    My motherboard has 2 PCI-E slots. 1 16x and 1 8x. Both slots change to 8x when 2 cards connected.

    If I connect the GTX 480 to the primary PCI-E slot then I typically lose signal to monitor when windows begins to load (sometimes it will get to the desktop but rarely and after a minute or two the system will crash/monitor will lose signal.) I can view bios or enter safe mode without issue.

    However if I connect a second card (8600gts I borrowed from old system)to the second slot so the primary slot is operating at 8x the card seems to work ok. This is also true if I connect the GTX 480 to the second slot which is 8x. I say the card works ok although I have noticed a few system freezes when running at 8x but I cannot be sure that these are card related or something else.

    I contacted EVGA support who suggested RMA however while trying that I've been told that if the problem is not replicated then I'll be charged and get the same card back. The blame is being pointed at my PSU and/or Motherboard. When running stress tests at 8x the card works fine so I find it hard to belive that the PSU is the issue. How could it power the gtx 480 under load at 8x but not when idle at 16x? I've tested the PCI-E slot with a 8600gt and 8600gts as thats all I have available to test with at present but until a few months ago I ran ATI 5850 CF. I tested both the 5850 on the Primary slot at 16x before selling them on without issue.

    So I return the card accept the costs and risk getting the same card back or somehow try and convince MSI or ANTEC that my motherboard or PSU is faulty despite them working fine with every other setup I've tried.

    I know the difference in performance between 16x and 8x is small. I'm not to bother about the performance more just having a card that works as intended with any system I choose.

    It seems all parts of my system work but just not when the GTX 480 is in the Primary PCI-E slot with no second card.

    So is the card , motherboard or PSU the problem?

    Any advise would be appreciated.

    Thanks
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  2. #2
    Banhammer in peace PeterB kalniel's Avatar
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    Re: GTX 480 Problem

    If other cards work in the x16 slot fine then it's not the motherboard.

    If your 480 works in the x8 slot, and in x8 mode in the primary slot, but not at x16 then it sounds like your interconnect somewhere between lanes 9 and 16 is damaged on the 480. Have a very close look at the PCI-E connector and see if any of the connections look damaged.

    Before RMAing see if you can reproduce on a different system - software is the other oddity that you need to rule out.

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    jawilba (01-05-2012)

  4. #3
    F.A.S.T. Butuz's Avatar
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    Re: GTX 480 Problem

    I'd be keeping an eye on software too. If it works fine in BIOS and Safe mode that could indicate some kind of driver / windows corruption. Can you try it in someone elses PC?

    Butuz

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      • Storage:
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      • Graphics card(s):
      • GTX 480
      • PSU:
      • Antec Truepower 650W Modular

    Re: GTX 480 Problem

    Thanks for the responses.

    I've reinstalled windows countless times and even installed ubuntu and the same thing happened so I think software is not an issue.

    I didn't really think to look at the card for any signs of damage as it kind of worked but since you mentioned it I just had a look.

    The PCI E connector looks fine however just above it there is a small scratch on the PCB. It also looks like there is a small bit of glue close to it.

    The only other system I have to test with has an 8x PCI E slot so doubt it will help.

    Think I'll just have to RMA the card and hope for the best.
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    Re: GTX 480 Problem

    What size PSU are you using? It might not be providing enough juice for the 480.

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      • Graphics card(s):
      • GTX 480
      • PSU:
      • Antec Truepower 650W Modular

    Re: GTX 480 Problem

    I'm using an antec truepower New 650w. It runs the gtx 480 under load at 8x so I'd be surprised if it's the PSU.

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    Re: GTX 480 Problem

    Quote Originally Posted by jawilba View Post
    I'm using an antec truepower New 650w. It runs the gtx 480 under load at 8x so I'd be surprised if it's the PSU.
    Yep probably not, I ran a 480GTX on a 520w PSU for well over a year so you should have no problems with 650w. I just know that dodgy PSU's/low watt PSU's have given me so many headaches in the past.

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    Re: GTX 480 Problem

    I would try it in another machine with a X16 slot just to test, as that will nail it's the card not your mobo. Then RMA is easy and cost free.

  10. #9
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    • jawilba's system
      • Motherboard:
      • MSI P67 GD65
      • CPU:
      • i7 2600K
      • Memory:
      • Corsair Vengeance PC3-14900 (1866), Non-ECC, CAS 9-10-9-27, XMP, 1.50V
      • Storage:
      • 2 x 60Gb OCZ Agility 3
      • Graphics card(s):
      • GTX 480
      • PSU:
      • Antec Truepower 650W Modular

    Re: GTX 480 Problem

    hi,

    I've since tried a different machine. unfortunately it's a gen 1 x16. the system does run but I noticed some artifacts when running heaven benchmark. Will rma I think and see what happens.

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