Can we get an official response from Gigabyte regarding Z68 cold boot?

[lkteer]

Nice if that actually works! I have the exact same problem, i have tried to different boards the ga-z68ma-d2h-b3 and the ga-z68mx-ud2h-b3, both have cold boot problems when more than 1 stick of ram is inserted. Have tried for days to get it to work with my corsair vengeance rams.

Only problem is that i can't find "PLL Overvoltage" setting in the bios for these two boards.  Where is it? ( please be there, please work   holding my breath  )
Otherwise i will have to return them both (which would be sad as i need them for my hackintosh)!

[Lsdmeasap]

CPU PLL Overvoltage is in the Advanced CPU Core features page.  On the advanced frequency settings page, right under the CPU clock ratio = click to enter.

Keep in mind if you are overclocking you will be limited to whatever CPU multiplier your CPU can do without CPU PLL Overvoltage enabled, this is likely less than x47/x48 or so.  Otherwise if you try to use too high of a CPU multiplier you will still run into booting issues due to the CPU multi being too high without CPU PLL Overvoltage enabled.

Since those are budget boards, you may not have this option anyway, so it would be disabled.  I'll check your BIOSes right now.

*Edit*

Just checked both of those boards latest BIOSes, the option is not present, so it would be disabled by default.

[lkteer]

Thanks for your time Lsdmeasap! Guess i'm no further a solution then. Both boards have problems booting when i insert more than 1 stick of ram, i don't get it. My intuition tells me it has to do with the pairing of the ram ( but seems unlikely to stem from the rams themselves since i've tested with other rams and the problems persisted ), or some kind of voltage problems because it seems less stable as you add more ram and always becomes unbootable when 4 sticks are inserted. Can't believe i have the same problem on these two boards i just bought!?

[Dark Mantis]

Have you tried increasing the memory voltage especially when you have filled all the banks. Don't forget to keep an eye on the QPI/Vtt though as you must maintain 0.5v max between that and the memory voltage.

[Lsdmeasap]

You may just need an increased QPI/Vtt voltage, this is often needed when increasing the memory to 4-8GB or above, try rasing this before you insert the second module and see if it helps.   Try 1.2-1.35 and see if that helps.

It very well could also be a memory compatibility issue, do you have or can you borrow other memory to test with?  If not, maybe think about buying a set of 2x2GB of something else just to test with, DDR3 is dirt cheap these days!

[Dark Mantis]

It very well could also be a memory compatibility issue, do you have or can you borrow other memory to test with?  If not, maybe think about buying a set of 2x2GB of something else just to test with, DDR3 is dirt cheap these days!

If you do follow Lsdmeasap's advice make sure that the new RAM is listed as compatible on the memory manufacturer's website QVL for your motherboard.

[Oubadah]

Is 'cold boot' the same as "The system has experienced boot failures because of overclocking"? I still get this stupid message all the time on my GA-Z68X-UD3R-B3. I had it on early p67 boards and thought they would have fixed it long ago. I'm not overclocking, how how can I experience "boot failures because of overclocking"? My next motherboard will be ASUS.

[Lsdmeasap]

NO, that means your settings are off and are crashing, so BIOS defaults will be used instead of what you see in the BIOS until you correct it with stable settings.

Overclocking or not you still need to setup a few things and test for stability.   Did you set XMP or setup your memory manually already?   You should do that, and ensure that the memory voltage is set to what is specified for your kit

[Oubadah]

NO, that means your settings are off and are crashing, so BIOS defaults will be used instead of what you see in the BIOS until you correct it with stable settings.

Overclocking or not you still need to setup a few things and test for stability.   Did you set XMP or setup your memory manually already?   You should do that, and ensure that the memory voltage is set to what is specified for your kit

Yes, I set freq and timings manually. Specified voltage was 1.5v, which is already default, but I also set that manually anyway.

[Lsdmeasap]

If you have 8GB or more you may also need to increase QPI/Vtt voltage, depending on your CPU you might need this anytime with any amount of memory as well because all CPU's are different and not all may be stable with the auto/stock amount.

[Oubadah]

If you have 8GB or more you may also need to increase QPI/Vtt voltage, depending on your CPU you might need this anytime with any amount of memory as well because all CPU's are different and not all may be stable with the auto/stock amount.

Does that count if your using 1333MHz and whatever the default sandy bridge timings are?

[Dark Mantis]

Oubadah I would suggest that you do as Lsdmeasap advises because he is a wizard at these things and I have learnt much off him before.  

[Lsdmeasap]

Thanks DM

Yes, if you have 8GB or more you may need to increase QPI/Vtt, I said maybe as it's not a definite.   Have you tested your memory at all using your current settings?   If not, please do as you may not need to change anything in regards to your memory.   Here, use this Memtest86+, run at least 5 full passes or overnight while you sleep.
http://www.memtest.org/#downiso

[Oubadah]

Thanks DM

Yes, if you have 8GB or more you may need to increase QPI/Vtt, I said maybe as it's not a definite.   Have you tested your memory at all using your current settings?   If not, please do as you may not need to change anything in regards to your memory.   Here, use this Memtest86+, run at least 5 full passes or overnight while you sleep.
http://www.memtest.org/#downiso

Yes, I've done memtest86+ 24 hours on each stick, then 24 hours with both stick, at rated settings: 1600MHz 8-8-8-24 1.5v 2T. No error, but then sooner or later gigabyte BIOS warning.

I don't want to overclock or  change ant QPI/Vtt setting as I don't know what I'm doing and I'll break something. If 1333Mhz 9-9-9-24  could be stable then I'd use that, but I don't know why I should need to mess around with BIOS just to get things stable at stock settings. Gigabyte p67/x68 just seems to be unstable - I don't know anyone with an ASUS board that can't run stock speed reliably without BOIS modification - 8GB or not.

[Dark Mantis]

I don't know anyone with an ASUS board that can't run stock speed reliably without BOIS modification - 8GB or not.

You do now! I have had problems in the past with Asus motherboards that have been memory related at stock settings. The thing is that board and components vary and especially if you are installing more than the basic amount of memory the settings can require a bit of tweaking.