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Thread: Continuous Boot Loop




  1. #1
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    Default Continuous Boot Loop

    So I got my custom Intel i7-2600K from CyberpowerPC, and after I installed the RAM I bought separately (2 x 4gb drr3 1600 Kingston hyperx), I turned it on the first time and after a few seconds it reset itself. It does this every time I turn it on, it'll stay on for like 10 seconds and then shuts off, then turns back on just to reset itself again.
    The computer is in a Coolermaster HAF-X Gaming Full Tower Case, has an Asetek 570LX 240mm watercooler (amongst some other normal fans), with a Gigabyte P67A-Ud7-B3 Intel P67-B3 motherboard, and 2 AMD Radeon HD 6970 2GB GDDR5 16X PCIe Video Cards. I chose the Xtreme Performance in SLI/CrossFireX Gaming Mode in the configuration, and it's powered by a 1000watt Toughpower Modular Quad SLI and CrossFireX Ready & Active PFC power supply.

    So the motherboard is giving the code 2b when the boot loop occurs, and if I unplug one of the videocards then the system will stay on but a loud highpitched noise is produced from the motherboard and it gives the code FF (still no signal to the monitor).
    I have tried unplugging things and running with only certain things plugged in, but nothing will change this boot loop from occuring. It will turn on for a few seconds, show some numbers until the code 2b occurs, then reset a couple seconds later.

    Could I have a faulty motherboard?

    (The code 2b says something about the video bios, so there's an issue with the video cards? I've ran it with just one hooked up, and I've made sure they are both installed correctly, yet to no avail)

    Also, the green and yellow and red LEDs on the motherbaord are on when the computer is turned on and resets itself.

  2. #2
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    Default Re: Continuous Boot Loop

    Do you have another gpu to test with other than the 6970's? Could need a mb bios update to run them properly?
    Gigabyte z77x UP4-TH F11c Modded Bios
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  3. #3
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    Default Re: Continuous Boot Loop

    could you post those specs in your sig?

    ok- so, what bios version is on that board?

    not to question your intelligence, but you have EVERY power connection made to the board and cards yes?
    Last edited by SeanDude05; 06-02-2011 at 01:56 AM.
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  4. #4
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    Default Re: Continuous Boot Loop

    Remove CPU and take a close look at the socket pins. I bet you have bad contacts to the CPU lands. Seen this in a few occasions with different P67 boards.
    Last edited by nijel; 06-02-2011 at 01:58 AM.

  5. #5
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    Default Re: Continuous Boot Loop

    No, I don't have any other processing units to check it with. How does one perform a bios update? The system isn't able to stay on long enough to get a signal to the monitor so I haven't been able to do anything to it.

    All of the power connections are hooked up.

    I don't know anything about the cpu sockets, but I will look into that.

  6. #6
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    Default Re: Continuous Boot Loop

    do you have any other video cards?
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  7. #7
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    Acebmxer is offline Gigabyte Elite
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    Default Re: Continuous Boot Loop

    2b
    When the system powers on and the Debug LED shows the usual POST code sequence but hangs on 2b or you get a beep code as soon as the sequence reaches 2b, then the Mainboard cant detect your Videocard properly. Note that the POST code sequence might not halt at 2b but continue, so the final POST Code it displays could be FF, 00 or 7F which means the Maiboard booted, entered BIOS, or OC recovery kicked in and is waiting for Input to enter BIOS. Since the Videocard couldnt be detected properly you will only see a black Monitor and either 2b, FF, 00 or 7F. Check if there is something wrong with the Videocard, the PCIE slot or BUS, the Monitor or monitor cable. Turn the Monitor on and off, switch the Monitor cable from one D-SUB or DVI plug to the other in case your Videocard has two. If this doesnt help then reboot and load the optimized defaults. If that doesnt help either try another Videocard if possible, or try the Videocard in another system to make sure its working properly. Try another monitor or try the Monitor on another System.

    You can try these steps here. If those dont work. Try both cards one at a time in the first pci-e slot. Make sure both pci-e power connectors are connected the the video card. You may want to try removing the motherboard from the case and try. Make sure you set the motherboard on the box that it came in and you will be fine. This will tell you if the motherboard or video cards are shorting out on the case.
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  8. #8
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    Default Re: Continuous Boot Loop

    You can only update the bios once you have a stable system,since you said 2b error code is gpu related and with one card it cycles through to FF code which means a successful boot,it points to a bios incompatibility issue with those cards imo,only way to test that would be to try with a different/older gpu,then if it boots up into the bios you can then flash to the very latest bios that might support your 6970 using qflash,it could be bent pins as there is a pcie controller inside the cpu now so if you do check the socket be carefull not to damage any,look for any that are out of alignment and post some pics if you can
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  9. #9
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    Default Re: Continuous Boot Loop

    P67A-Ud7-B3 doesn't have problems with 6970. I'm running one on mine from the very first B2/B3 bios. Run the bare minimum, 1 stick of RAM, 1 6970 try all PCI-e slots, try both cards one at a time.
    Check the CPU socket pins with magnifier.

  10. #10
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    Default Re: Continuous Boot Loop

    It depends what brand of gpu though,I've seen some cards have issues,only way to eliminate it would be to test another gpu,each brand uses their own bios
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

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