gigabyte z77x-ud5h cold boot problems !!

kvnwds43

kvnwds43

kvnwds43

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hi there guys im having problems booting my computer when its cold in the house e.g first thing in the moning when just got up when the heating has only started up , now when its warm in the house and i boot it up theres no problem it seems to be just when the room is cold !! now ive got the latest bios version on ther motherboard ! what happens is ...it doesnt even get to the gigabyte logo screen of the post ! it just clicks and restarts itself !,sometimes it might do it 3-4 times before it carries on booting up ! do you think it might be a motherboard problem or a psu unit problem ! been doing it now a couple of months now at least , but is really getting on my nerves now .....help please ? thanks in advance
 
I am having exactly the same problem, and I have tried everything, RMA'd the board, new ram, new psu and it still does it, but quite right only when its very cold, has to be under 15 for it to happen according to my thermometer
 
flashing both bios chips with the same version of bios helps

press alt and f10 repeatedly and fast at gigabyte splsh screen,
 
It's weird as mine has started doing similar recently, so I guess it could well be the cold weather.

Mine tends to either get as far as the Windows loading splash screen and then blue screens, which is a PITA as I've normally walked off to make a cuppa. And then by the time I get back, instead of it being at the logon screen it has reboot and started running a Windows repair. :(

Or it does the double POST thing where it half POSTs, then the clicks and the reboot.
And the annoyance when it does this is, is that it has more often than not reset the CMOS, which when you normally have some h/w disabled in BIOS is a pain if you don't realise and log into windows before you do.
 
hmmm i think i will try flashing both bios for starters, try that ,shant bother changing the psusupply dont think that will change things ,other than that might change to a asrock or asus board .
 
My motherboard does this a hell of a lot too! My room is very cold especially of late with the weather. I have a different problem on top of that causing my pc to freeze at random times during post, even did this during a bios update, so now my pc is fubard.
 
sounds like this is a common problem ! i tried flashing the 2nd bios last night to no avail apparently the alt +f10 thing doesnt work with the new bios after doing some research ! i stuck with gigabyte cos my last board was so good , but i hasten to say this isnt the only problem ive had !
 
Set everything to stock speed and ensure the RAM voltage is set correctly. If you have 4 sticks of ram try taking 2 out to see if the reduced load helps out.

If you still have issues at default CPU and ram speed then it's probably a board or PSU fault. Note that I had all sorts of similar issues to the one you're experiencing (random reboot) until I replaced my 5yr old 700W OCZ power supply with a new 650W Seasonic Gold PSU.
 
kvnwds43 said:
hi there guys im having problems booting my computer when its cold in the house e.g first thing in the moning when just got up when the heating has only started up , now when its warm in the house and i boot it up theres no problem it seems to be just when the room is cold !! now ive got the latest bios version on ther motherboard ! what happens is ...it doesnt even get to the gigabyte logo screen of the post ! it just clicks and restarts itself !,sometimes it might do it 3-4 times before it carries on booting up ! do you think it might be a motherboard problem or a psu unit problem ! been doing it now a couple of months now at least , but is really getting on my nerves now .....help please ? thanks in advance
Click to expand...

This is completely normal and is just memory training 7 clock gen full reset. If it does not loose settings and holds the overclock it is comppletely fine. All my boards (and I have a lot!!!) do this including both X79 and Z77 formats and by all major vendors.
 
It just training of the onboard memory controller and reseting the clock gen. Its not a problem.
 
It shouldn't keep doing it though. Especially if you've reached your stable clock settings, and only when cold? Mines definitely done the random extra reboot thing when I'm changing clocks or BIOS settings but not once I've settled on 24/7 settings.
 
I'm sure i remember something similiar with a Gigabyte DS4 back in the Core2Duo days... not sure if its the same thing but I agree it shouldn't be doing it... quite frustrating to turn a PC on and have it reboot several times!
 
Gangster why are you confident it should not happen??? and can categoryly state this.

On power up the system retrains the settings. You have four sticks and its training the settiings you left at Auto for each stick each time you boot from cold they will be slightly different and are never 100% consistent. How do you think the system knows what to set as auto if it does not test/Train??

Its actually helping to ensure stability by this memory training.

Components at differing temps will have different training patterns we all know how heat effects components and this is no different at cold boot. Heat effects the CPU most and the IMC is on the CPU. A cold CPU may well apply too tight settings to the RAM which will not boot, then the system tries further AUTO settings until one will post.

An extreme example of this is my auto settings at -100 would be different from a cold boot auto settings at ambient and somtimes very different indeed but because the IMC is so cold the system is still stable and posts. Its not always RAM timings either that stop post and another retrain it can be the IMC warming up. Sometimes I actually use this feature to my advantage i.e I train at room temp so slacker timings are applied to some subs, then pull down temps but not shut down the system, then when you bench you end up with overall a more stable memory profile whilst only losing a touch of performance.
 
I'm not doubting your reasoning 8-Pack, but it shouldn't be doing this at stock speeds. If this is the case then I'd expect EVERY system to do it, not just a few.

I'm fine with the behaviour if it's due to overclocking a system too close to the limits but it shouldn't do it if you are running the CPU with high quality RAM at stock speed which is what's being implied.
 
It does not matter what speed your running a system emory still needs training, PCI ex lanes setting up etc etc all onboard the CPU. The main point really is, is your szstem stable??? if so no problem exists.
 
Manually enter BCLK 100.1 in Bios. Solved all cold boot issues for me and been fine for months.

I booted the other day with a room temp of 8c and the PC having been off for hours.
 
covenantuk said:
If my system rebooted 3 or 4 times every time I wanted to use it, it's not stable in my view.
Click to expand...

Its not rebooting!!! Rebooting means it reaches post. It has not booted yet.

Some BLK the system may well like yes 100.1 is an option.
 
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