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Asus P8Z68-V Pro Double boot problem - Page 3

post #21 of 45
Quote:
Originally Posted by TerrabyteX View Post

i have updated my bios to 0801 and it didn't fix. just try what i say ! disable pll overvoltage ! And yes it is need for multi 50x ( 5ghz and up ) . I don't need it for 4.8 or 4.9 ghz.
How to flash your bios. if u have an usb stick simply format it clean in fat32 format, put all bios updates on it, 0601,0701,0801 and if u wish 0902 and boot. Go into bios , last tab, EZ Flash and click it. After it loads simply select your flash usb if it isn't selcted and click first update 0601, wait it to load, reboot and repeat. That's how i updated to 0801.
Repeat: updating the bios won't fix it.
Try1: Powe on by PCI-E
Try2: disable PLL overvoltage ( this works 100% )

Why would you need to flash BIOS in order. They're not dependent on previous versions. It's not like updating Windows where there's an order requirement. The entire ROM is overwritten. You'd be asking for trouble flashing BIOS 4 times when only one time is required.
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post #22 of 45
I might have determined a probable cause in my case. I have a USB wireless network adapter on my computer. The times I switch on my computer and I get this double-boot problem, when I get into Windows, the USB wireless network adapter is powered and works from the start. However, the times I switch on my computer and it boots without an issue, when I get into Windows, the USB wireless network adapter is powered down and I need to unplug it and plug it back in to make it power up and work. Possible connection!?
    
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post #23 of 45
Thread Starter 
Hi guys,

I've not been active on this thread...my thread...for a while now, a few things happened recently changing my circumstances and I've been busy trying to straighten them out so I haven't had time to do any BIOS testing.
Quote:
Originally Posted by xeno666 View Post

I have found that this will only occur if i switch off at the psu or unplug the machine. If i simply leave it powered down, boots first time..every time. From cold, double boot and hang.
Annoying.

Xeno666, I believe that the reason for the double boots once you power down the PSU is related to the charging of the capacitors on first boot. If I'm not mistaken this was an acknowledged issue with the P67 platform. Having said this, I do not turn the PSU off at night, I simply power down and I still get the double boot issue. So for me at least this isn't the problem.

I'm not sure why you would want to be flipping the power switch each night, but if you can leave the PSU powered on, I'd say you're best off doing that and you have no problem smile.gif
Quote:
Originally Posted by Gib007 View Post

I might have determined a probable cause in my case. I have a USB wireless network adapter on my computer. The times I switch on my computer and I get this double-boot problem, when I get into Windows, the USB wireless network adapter is powered and works from the start. However, the times I switch on my computer and it boots without an issue, when I get into Windows, the USB wireless network adapter is powered down and I need to unplug it and plug it back in to make it power up and work. Possible connection!?

Gib007, I've read your replies to the topic, I don't have the issue of the PC hanging at boot, I simply see a double loop take place. So I'm not really sure what the issue there is. To also give you some further idea of my setup I do not use any wireless network adapter and still experience the double boots.
But then again I'm not on the latest BIOS due to the lack of time since I opened this thread.
Quote:
Originally Posted by TerrabyteX View Post

i have updated my bios to 0801 and it didn't fix. just try what i say ! disable pll overvoltage ! And yes it is need for multi 50x ( 5ghz and up ) . I don't need it for 4.8 or 4.9 ghz.

Try1: Powe on by PCI-E
Try2: disable PLL overvoltage ( this works 100% )


Terrabyte X, or anyone else who might be able to help for that matter, as I have my OC setup originally with PLL overvoltage enabled, will anything happen when I disable it?
My understanding and indeed the reason for using PLL overvoltage was because I thought it was the difference between a stable OC and not.

I'm still not exactly clear on what the PLL overvoltage is or does, but I notice that when running tests on my PC my voltage is usually at 0.9v and when the processor kicks into the OC maximum I've set (4.5Ghz) the voltage goes up to 1.214v. Will the disabiling of PLL stop this behaviour or put any of my components at risk?
post #24 of 45
Well I have determined earlier that no, the USB wireless network adapter has nothing to do with it on mine. Maybe it has something to do with the hanging on the Windows 7 logo but not the double boot issue. I don't know if these two are connected.

To be honest, whenever I flashed the BIOS to a later version, I had my computer turn itself off and on about four to five times before it finally booted with the new version of the BIOS. In theory it should only turn itself off once and back on and that's it, BIOS update done. Before flashing to 0902, this only happened whenever I updated the BIOS and not ever again. With version 0902 however, the double boot issue is a consistent problem that happens almost everyday.

I too was staring at the CPU PLL Overvoltage setting earlier but I dare not disable it. My 4.80 GHz overclock is nice and stable with it on. I haven't tried it with it off, though - is there any difference to be expected?
The BIOS advertises this as able to stabilise high overclocks.
    
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post #25 of 45
Thread Starter 
Quote:
Originally Posted by Gib007 View Post

To be honest, whenever I flashed the BIOS to a later version, I had my computer turn itself off and on about four to five times before it finally booted with the new version of the BIOS. In theory it should only turn itself off once and back on and that's it, BIOS update done. Before flashing to 0902, this only happened whenever I updated the BIOS and not ever again. With version 0902 however, the double boot issue is a consistent problem that happens almost everyday.

So with 0902 you're PC is booting several times before turning on?
post #26 of 45
So it turns out this is becoming more of a problem for me and i am facing the possibility of returning the entire system based on this. Up to now, as long as i didnt switch off the psu, system would boot fine. Yesterday i started pc as normal, and she hung on the loading windows logo again. Powered down and system then booted fine. This morning before i left for work, double boot again and this time bios tells me overclocking has failed. Seems if i ctrl, alt, del at this point she will boot fine. But greets me with overclocking failed everytime after i boot from cold. Once into windows, everything is 100%..overclocking is stable and system runs without a hitch....i dont fancy having to live with this problem full time and do not want to remove the oc as this is the reason i bought this system...any ideas~?
post #27 of 45
Thread Starter 
Quote:
Originally Posted by xeno666 View Post

So it turns out this is becoming more of a problem for me and i am facing the possibility of returning the entire system based on this. Up to now, as long as i didnt switch off the psu, system would boot fine. Yesterday i started pc as normal, and she hung on the loading windows logo again. Powered down and system then booted fine. This morning before i left for work, double boot again and this time bios tells me overclocking has failed. Seems if i ctrl, alt, del at this point she will boot fine. But greets me with overclocking failed everytime after i boot from cold. Once into windows, everything is 100%..overclocking is stable and system runs without a hitch....i dont fancy having to live with this problem full time and do not want to remove the oc as this is the reason i bought this system...any ideas~?

Just to make sure, you're running the same board/cpu as others in this thread? I'm only asking as I can't see any specs for your system.

Anyways, I'm sure I saw an OC fail error once on my system when I had my BCLK set at 101.3, since dropping that down to 100 and increasing the multiplier instead I've not had a problem. It may be worth giving that a go.
Regarding the hanging once you get to the Windows logo screen, that only happened to me once and my graphics card was to blame of that occasion.
Edited by 5nak3 - 11/19/11 at 6:00pm
post #28 of 45
Hi Am using the Asus P8Z68-V (non pro) version on stock 0606 drivers.

The cpu fan error went away as soon as i reverted back to my oc profile but this double post and hang nonsense is really atarting to become tiresome. Am faced with possibility of returning system this week and really dont want to as rig is 100% stable once into windows. Cant shake the feeling it is something in the bios that needs changed but am running out of ideas
post #29 of 45
Thread Starter 
Sorry Xeno, can't help on that front. All the posts I've read state one of the following fixes:
  • Set BCLK to 100
  • Disable PLL Overvoltage
  • Update firmware
  • Set 'Power on by PCI-E' as enabled in Advanced -> APM
  • Don't turn your PSU off at night

I don't think I've missed out any 'fixes'...the only one I need to try now is the disabling of PPL Overvoltage, but I want more information on what the setting is actually doing before I fiddle with it.
post #30 of 45
Thanks for the reply, i have been talking to a few folks at asus and regarding the pll overvoltage, they have said that it is cpu dependant. Some wont bat an eyelid with it of and perform at 5000 mhz but some wont make it to the desktop. Would be interested to hear the results of it if you try it. Am at work right now so cant try it myself, maybe later.
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