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Thread: Takes 10~20 minutes to clear the CMOS??




  1. Question Takes 10~20 minutes to clear the CMOS??

    Sorry lsdmeasap,

    I know I posted a response in the Memory Timings explained sticky about this same question but I thought it might interest other folks. Something kinda funny happens when I clear my CMOS and I was hoping to find an explanation for it: you'll see reference to it in the last/bottom paragraph below:

    Does it really take 10~20 minutes to clear the CMOS if you hook up the RESET switch to the CLR CMOS jumper pins???

    Or did you mean 10~20 seconds???

    I've always thought that it only took 10~20 seconds all these years. Can't imagine that using the RESET switch to clear the CMOS would change things that immensely. Been using the jumper method since the early days.

    Very peculiar thing though. The newer boards over the last few years must not complete drain the residual charge left in the CMOS memory after grounding the CLR CMOS jumper. Often times I have used the jumper to reset the CMOS for even 30~60 seconds and go back into the BIOS and the time does not reset. Must be drawing power from other devices hooked up to the system somehow. Or maybe it takes longer for multi-BIOS boards to drain??
    GA P35 DQ6 rev. 1.0, 2x2GB Mushkin XP2 Ascents, 2x2GB Mushkin XP2's DDR2-1066 PC2-8500, Intel Core 2 DUO E8600, 3.33Ghz with Gigabyte CPU Cooler, PNY GeForce 8800 GTS, Antec 900 Gaming Case and Antec True Power Trio 650w PSU, Hauppauge HVR 1600 TV Tuner, old Sony CD/RW that still kicks butt, Sony external DVD, Smart Card Reader, 4 Western Digital Caviar HDD's: 80Gb, 120Gb(usb,external, swap), 160Gb, 250Gb and 320Gb.

    Running it all with Windows XP Pro SP3, Perry Mason and Della Street. Paul Drake's out on assignment. He's helping me locate 64-bit drivers for XP Pro x64 Edition that I'm working with now.


  2. #2
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    Default Re: Takes 10~20 minutes to clear the CMOS??

    it definitely takes quite a while if you use the jumper only on the clear CMOS pins... if you simply turn off the PSU, remove the mobo battery and cross the contacts with a screwdriver or the like, you should see the CMOS be completely cleared (including the time) within about 20 seconds (but its also a good idea to cross the clear CMOS pins similarly afterwards)

    EDIT: Some boards will also have an onboard reset button, but this is still not as effective as turning off the PSU and allowing the charge to be completely drained through either removing the battery or leaving a jumper on the clear CMOS pins for about 15 minutes
    Last edited by BongWizard; 10-07-2008 at 08:04 PM.
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  3. #3
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    Default Re: Takes 10~20 minutes to clear the CMOS??

    ^^ Rightly stated above ^^

    And wow, if you think that is long, try the battery removal only! That can sometimes take 8-24 hours.

    You may also put the jumper on, or switch your "Clear CMOS switch" on with the PSU unplugged and Push in the actual Power on button to speed things up, this will help the system drain power quicker as well.

    And before you ask now, as already stated in the Flash guide, A CMOS Checksum Error screen is normal after you Properly Clear the CMOS, so dont let it scare you. Pick a BIOS (if you have DQ), or a Setting profile, or last known good if you like.

    Then once you are in there please load optimized defaults again, and save and apply (Only necessary if you are doing a flash to a new version, not needed if you had a bad overclock and had to clear)
    Last edited by Lsdmeasap; 10-07-2008 at 11:43 PM.

  4. Default Re: Takes 10~20 minutes to clear the CMOS??

    Thanks to the both of you.

    Never realized that it took that long.

    I rigged up an old case front-panel 2-wire cable still with plug in terminal on one end and some auto-electric spade (male/female) connectors on the other end. Personally, I don't see myself just standing there holding down the RESET button for 10~20 minutes waiting for the drain. All I have to do is switch of the PSU, connect the male/female spade connectors, press the POWER button a couple of times and, heck, take a walk, a nap, a shower, watch Perry Mason, go scream at my neighbor's noisy dogs, etc...LOL
    GA P35 DQ6 rev. 1.0, 2x2GB Mushkin XP2 Ascents, 2x2GB Mushkin XP2's DDR2-1066 PC2-8500, Intel Core 2 DUO E8600, 3.33Ghz with Gigabyte CPU Cooler, PNY GeForce 8800 GTS, Antec 900 Gaming Case and Antec True Power Trio 650w PSU, Hauppauge HVR 1600 TV Tuner, old Sony CD/RW that still kicks butt, Sony external DVD, Smart Card Reader, 4 Western Digital Caviar HDD's: 80Gb, 120Gb(usb,external, swap), 160Gb, 250Gb and 320Gb.

    Running it all with Windows XP Pro SP3, Perry Mason and Della Street. Paul Drake's out on assignment. He's helping me locate 64-bit drivers for XP Pro x64 Edition that I'm working with now.


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    Default Re: Takes 10~20 minutes to clear the CMOS??

    I use a toggle switch on one system and a needle on another to hold down the actual case reset switch.

    Perry Mason is still on? J/K, just hadn't seen him in a while myself.

    TIVO has the better of me

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    Default Re: Takes 10~20 minutes to clear the CMOS??

    I have always just jump the pins on board and i have never ever have any problem whatsoever, I just have done it for a few sec and volia it boots up default again and problem solved :D

    I only have to cleared cmos 1 time with my new comp, P45-DS3R and man thats great couse on my other before it was a MSI 750 nVidia chipset and that board did have a Reset switch back at where all your inputs like USB and sound was and that was a crappy board, had to clear cmos all the time LOL. but it was so convinient it dident matter, just wish all other could follow that example so one dont have to open the comp and trix with the mobo so you hear me Gigabyte boo for that one ;)

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    Default Re: Takes 10~20 minutes to clear the CMOS??

    Ga-P45 now has a Clear CMOS Switch, but it is inside the case.

    But hey, it is there at least now! >>>>



    Along with a Power and Reset Switch, great for working outside of the case!!

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    Default Re: Takes 10~20 minutes to clear the CMOS??

    i was in love with those switches when i was first getting my new rig setup... just had to leave the side panel off the case for the first couple days lol
    NZXT Lexa BlackLine Case with Red LEDs
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    Gigabyte EP45-DS3P (BIOS F7)
    Intel Core 2 Quad Q9300 @ 3.73GHz (downclocked for the summer )
    OCZ Vendetta 2 CPU Heatsink
    2x 2GB Kingston HyperX RAM PC2-6400 @ 996MHz (4-5-5-15)
    3x Seagate Barracuda 7200.11 500GB HDD in RAID5
    2x HIS Radeon HD 4850 @ 745/1090 in CrossFireX
    2x ThermalTake DuOrb GPU Heatsink
    D-Link Super G PCI WLAN Adapter
    Asus Lightscribe 20x SATA II DVD-DL Burner
    Creative X-Fi XtremeGamer Fatal1ty Pro
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    Default Re: Takes 10~20 minutes to clear the CMOS??

    Right! They are great outside of the case, I had my board going at 4.2 on the box before I ever installed it into my case, and flashed up a few BIOS versions as well

    Very nice indeed, and I am glad it is blue and not red or green

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    Default Re: Takes 10~20 minutes to clear the CMOS??

    Quote Originally Posted by Lsdmeasap View Post
    Ga-P45 now has a Clear CMOS Switch, but it is inside the case.

    But hey, it is there at least now! >>>>



    Along with a Power and Reset Switch, great for working outside of the case!!
    Okey is it on the newer P-45 you say as I cant seen any with my P45-DS3R?
    Very good of Gigabyte to put em in atleast :)

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