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Asus p8z68 board wont boot with nvidia graphics card

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October 19, 2011 9:23:12 PM

So I've been having this problem since the build of my new build of PC in August.

Specs:

Asus P8Z68-V MB
Intel i7 processor
2 x Corsair DDR3 4GB Ram
ASUS GeForce GTX 570 graphics card
TX 750W Power

When I first built the computer it ran fine, however after about a week or two, it would automatically turn off once Windows 7 booted.

I later pinpointed this to be in result of the Video Card, computer would load and run fine so long as I disabled the NVidia drivers, or unplugged my video card.

I sent the card in for an RMA and while Asus replaced it, they couldn't replicate the problem, however soon as I installed the new card same issues.

I later read some forum posts about Enabling XMP, or others about manually setting BLCK to 100 neither of which worked.

I was fortunately able to return and replace my motherboard with the vendor however the new motherboard I have after a week of running fine has run into the same problem of not being able to boot into windows 7 with the video card drivers enabled or the card present.

This has been frustrating to say the least. Any thoughts or ideas or did I just get stuck with a bad build of a board?


October 20, 2011 3:48:22 PM

This might help ..


Go Here and read the install order- > http://www.tomshardware.com/forum/297010-30-asus-p8z68-...

I had a simular issue because the load order of Win7-64 tried to load/discover the video drivers in the wrong order.

Let me know.

- You might want to forward here the installed Drive types. IDE/SATA mode or AHCI because if you're using a previous install of Windows 7 on an existing HDD and you tried to boot with the P8Z68 AHCI bios default, then the Windows registry must be changed to reflect a AHCI boot to be properly recognized at boot time. Its a simple one line entry change.

See: http://support.microsoft.com/kb/922976
To fix this automatically with the Microsoft Fix-it tool.

ALSO -
- If your power supply is NOT providing at least 600 watts at >> 80% load <<, then that alone will cause a simular issue as it cannot reach >> AND << maintain the proper threshold voltages.

Surely.. one of these, or a combination of them, should fix your issue barring any real hardware problem
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October 27, 2011 12:14:04 AM

Thanks for the replies, with the drivers disabled and or the card removed the system runs fine.

I've tried formatting windows and starting fresh but that made no difference once the drivers are installed the rebooting starts.

I also tried booting with only a single hard drive, but the problem persisted.

Switching the igpu off didn't seem to have an affect either..

I'm a little skeptical about it being a power issue, as it was able to load originally (ran for a week) with the video card in, after which the problem started to occur. also 750W psu should be enough even when not running in any overclock mode.

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Related resources
a b Ĉ ASUS
a c 101 V Motherboard
October 27, 2011 2:09:38 AM

If you can get hold of another PSU to debug I would certainly try it. This isn't a common issue. Can you also check all system temps.

One last thing I would also try in disabling a setting called Surge Protection in the Advanced section of UEFI (it's in one of the sub-menus).

-Raja
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October 27, 2011 5:16:58 PM

raja@asus said:
If you can get hold of another PSU to debug I would certainly try it. This isn't a common issue. Can you also check all system temps.

One last thing I would also try in disabling a setting called Surge Protection in the Advanced section of UEFI (it's in one of the sub-menus).

-Raja



Good Point!

If I were seeing your issues consistantly - then I would also have reason to suspect the CPU may not be "exactly" seated properly.
If you find you're at a last resort for a primary cause, then the following is worth the effort.

1) Remove all power source, give it a bit of time to discharge and remove the Fan & CPU itself - from the board's CPU mount.
2) Inspect both the mount for misaligned contact points and/or some blemish or contamination on the contact side of the CPU.
If you see a discoloration or other miniscule contamination in the area, then correct this or replace the affected item.

These issues are not typical as Raja has said. Yet I have see other's self builds with rare issues that are directly related to CPU-to-boardmount contact problems. I usually found a piece hair (cat/human eyelash), bent down pin & finger oils on contact side CPU. Once these were addressed. It booted fine in those cases. Rare, but can occasionally occur if one is not careful or ones attention gets distracted during the insertion process.

Just thought I'd mention it!
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