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Thread: Gigabyte motherboard - GA-EP45-DS3 reboot loop




  1. #1
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    Unhappy Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Just got new components for a new PC build, including this Gigabyte motherboard (EP45-DS3).

    Turn it on, it comes up with the brief video card BIOS message, and then the motherboard logo screen. 99% of the time, it will wait here for 5 seconds and then completely reboot.

    The keyboard doesn't work during these 5 seconds, apart from 1% of the time - when I have, for example, managed to press "TAB" to get to the "real" POST screen, or "DEL" to get into SETUP. I've got into SETUP only two or three times in the last 3 hours.

    Once, after being in setup, I even got to the Windows installation screen, booting from the CD. This hung after about 10 seconds, though. I've managed to get to the Windows installation screen twice.

    The last time I went into setup I set it to "Fail-Safe Defaults". This didn't work.

    More recently I've removed power, removed the CMOS battery, waited 30 minutes, replaced the battery, restored power. Still the same result.

    I've got down to detaching everything but the video card, RAM and CPU (+cooler). I've even unplugged the front panel USB and audio connections from the motherboard. You know, straws and clutching. Still no joy though.

    The motherboard says on it "Rev 1.0". It's got dual BIOS on it, and I think I heard it said that sometimes the dual BIOS Rev 1.0 boards are corrupt, or some such?

    The rest of the system is:

    - 2 * 2048 MB Corsair TwinXMS DDR2 RAM (matched pair, each marked CM2X2048-6400C5, 5-5-5-18 timings, 800MHz)

    - Intel Core2 Duo E8400 (3.0Ghz, 1333MHz FSB, 6MB cache) with stock cooler

    - XpertVision GeForce 9800GT

    - 2 * Seagate Barracuda 7200rpm 500GB hard disc (7200.11 series)

    - Pioneer BDC-202 Blu-Ray drive

    Apparently my BIOS is version F5 (when I managed to get to the POST screen, I worked out which bit mentioned the BIOS version).


    Any ideas, anyone? If it is the corrupt BIOS thing, and given I can't boot or get as far as flashing, is it a "Send It Back" job, or is there anything else I can try?

    Thanks in advance for any suggestions.
    Last edited by Lsdmeasap; 10-11-2008 at 01:12 PM.

  2. #2

    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Try again this time with a single memory card inserted, enter BIOS and set the memory with correct voltages and timings and shutdown the computer. Mount the second memory card - this time the MB should boot normally. Proceed with the correct full setup.
    GA-Z97-D3H Windows Pro 8.1
    i5-4690K + Corsair H90
    Sapphire Radeon R7 240
    16GB (2x8GB) DDR3 Corsair Vengeance Pro 2400MHz PC3 19200
    Corsair CX750M
    Samsung SSD 840 EVO 500 GB

    Sharkoon VS-3V tower

  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Please install one stick of ram in slot one only then see if you can get to the BIOS. If so make your changes needed to install and go ahead with your install. If you need help with settings for both sticks Let me know and I can post them for you.

    In the mean time please if you can test each stick with Memtest86+ by itself on your system if you can, or another to be sure you do not have any DOA sitcks... It happens

    You want to load optimized defaults, then save and apply and reboot back to the BIOS to make other changes.

    I would for sure set your ram voltage manually to 2.0-2.1 (What you see on your ram sticker), and set MCH voltage to 1.2-1.3 if you are using both sticks. Then be sure stack tRead value is set to 9-10 until you get all installed, trfc to 62 for now as well.

    Once you get going you can change the rest and lower somethings

    Corrupt BIOS happens from Bad flashes, and other various issues. Your BIOS is fine, none of what you have mentioned is due to a corrupt BIOS.

    What PSU do you have, and what OS are you installing? Just random questions I suppose, the main problem you have is incorrect Auto Settings for Voltages and ram timings I suspect.

    Why the cross out of the message?

    Well, Let me know if you need more help

  4. #4
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    I don't know why it crossed out my message - it just happened like that when I posted it! Was fine in preview! Humph.

    Will try what you suggest, thanks.

  5. #5
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Ill check it out, sometimes on Vbulletin codes entered mess up posts. So I would assume you had a incorrect code, or a < symbol to close to some words.

    Ill check, fix, and post/quote here what part of your code messed it up so you will know next time

    Yeap, it was a < Too close when you typed del and tab. < and > Symbols cannot touch letters on Vbulletin boards

    Here is why >>>
    < TAB > to get to the "real" POST screen, or < DEL >
    Last edited by Lsdmeasap; 10-11-2008 at 01:14 PM.

  6. #6
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Thanks again - I'll remember that in future!


    I can't get any joy out of the board, so it's been RMA'd.

  7. #7
    Lsdmeasap's Avatar
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Sorry to hear that, it was likely the ram/ram settings and not the board. Did you get a new one or plan to get the same I mean?

  8. #8
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    I exchanged for an ASUS P5Q (had been put off Gigabyte by the episode, and have had reliable ASUS boards in the past). ASUS board arrived this morning, was installed, and not a sniff of a problem was had. Easy, clean installation. Bah humbug to that particular Gigabyte board.

  9. #9
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Well at least you are back in business. Sorry your Gigabyte experience went south

  10. #10
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    Default Re: Gigabyte motherboard - GA-EP45-DS3 reboot loop

    Hi there,

    I am going through the same experience unfortunately. The board won't post no matter where the memory is installed. It power-cycles every 5 seconds. Tried with two different PSUs with the same result. If I take the cpu out (c2 duo e8400) the board remains on, but as soon as the cpu is on board, the problem appears. Hope I can have it replaced since I only got it two days ago. Not sure however if I want another of those or get an Asus instead.

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