Weird OC side-effect

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HavocXphere

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I've got a modest OC going on my PC, but I'm getting a weird side-effect: On a cold boot, the PC powers up for half a sec, then shuts down. 1 sec delay & then powers up successfully.

Voltages are at stock & temps are fine (heated room atm, so its a bit high in pic below).

RAM is CL5 spec Kingston ValueRam running at 4-4-4-12.:cool: Already tried dropping it to relaxed timings...didn't help.

CPU is @ 2.8ghz w/ stock cooling.

PSU is a cheapish 500W.:o

I've got a feeling the short power up is going to screw the HDDs. Thoughts?

l4b5a.png
 
Instead of overclocking, have you considered increasing the RAM a bit. 32-bit OS's can recognize about 3GB (some 3.5GB)

Also, the 80GB drive, is it the boot drive ? The older 80GB drives were a bit slow in comparison to the new drives available today.
 
My Asus board does the exact same thing sometimes. On mine, if you set the board to overclock for you, it will turn off, back on, off again, on once again and then it will boot. It could be a BIOS setting that does that
 
Yeah, it's the Asus boards... It usually happens when a setting in the BIOS causes your PC to not be able to boot up. The board then shuts down and reverts to the old setting, especially when overclocking etc. Are you changing anything when this happens?
 
The way I see it, with my P8P67-M Pro, I tell the BIOS to overclock as much as possible. It then shuts down to start finding the max OC. It starts up, cranking the settings up until it fails (before it loads Windows, this is all in the POST and BIOS). Then it shuts down, and reverts to the last known 'good' value and boots up with that specific setting. This is what I think happens, but I could be waaaay wrong.

How are you overclocking your system? Manually?

PS - I don't overclock my system, the way I know the above info is because I tried it out to see how well the Asus board is willing to push itself. my 2c
 
Mine also sometimes does this, but only very occasionally

I have an MSI motherboard and an i5-760 OC to 4.0ghz.

I think its probably something to do with the BIOS loading the correct profiles or something, I doubt its anything to be worried about.

But I stand to be corrected :)
 
when you say voltages are at stock does it mean at stock specified or auto???

up the vcore a bit and set LLC to auto
 
Firstly, thanks for the responses....didn't expect so many.

wabbit16 said:
My Asus board does the exact same thing
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:(

doobyscoo said:
If you set everything back to stock does the problem go away?
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Yes.

TJ99 said:
The board then shuts down and reverts to the old setting, especially when overclocking etc.
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That was my first thought...that Asus recovery thing. I don't see it changing anything though?

LFX said:
when you say voltages are at stock does it mean at stock specified or auto???

up the vcore a bit and set LLC to auto
Click to expand...
Auto voltages. That seems to end up at ~1.3. I'll up it to test. LLC is on auto I think...I'll check that too. Bit annoyed at this though since the PC is stable even at a hectic undervolting...its just the startup.

Thanks
 
ITCynic said:
Instead of overclocking, have you considered increasing the RAM a bit. 32-bit OS's can recognize about 3GB (some 3.5GB)

Also, the 80GB drive, is it the boot drive ? The older 80GB drives were a bit slow in comparison to the new drives available today.
Click to expand...
Missed this one.

Extra RAM: A good suggestion, but I think I'll save the cash for a new PC. The reason for the OC was that the CPU was bottlenecking BFBC2. Plus I'd lose dual channel, which is good for like 3%.

Boot drive: Good point. Yeah its boot...mainly because it makes reformatting easier. I'll check the performance though with HDTune....might be worthwhile switching.
 
I read a post on Overclock.net, they say there is a BIOS setting in the newer Asus mobo's that cause this. I'll try and find it for you

EDIT: FOUND IT

Some of you may have been experiencing a double POST on your P8P67 series motherboard whereupon after powering on the system from a cold boot, the board will power on and then immediately reset itself before it actually POSTs and shows any display on the screen. I’ll explain the fix below and give some information about why this happens.

First, I would like to stress the importance of flashing the BIOS to the latest BIOS revision as listed on our support website, http://support.asus.com/download. You can access the ASUS EZ Flash tool from within the UEFI (advanced options, tools) to flash the BIOS from any removable device such as a USB flash drive.
From time to time we needed to implement full resets in order to maintain stability due to the architecture of the Sandy Bridge platform. For instance, the system may require one full reset when the PCH power has been cut during S5 power state. To fix the most common additional reset (double POST when powering on from off state), enter UEFI BIOS -> go to ‘Advanced’ tab -> go down to ‘APM’, press Enter -> enable the “Power on by PCIe.” function. Then press F10 to save & exit. After save & exit, let the system boot into Windows or other OS, then perform a proper shutdown: Start button -> Shut down. You will no longer have the double POST. We will fix this in an upcoming BIOS release.
Click to expand...

This is for the P67 series boards but it may be something similar with your 775 series board?
 
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wabbit16 said:
EDIT: FOUND IT
Click to expand...
Schweet. First solid lead on this. I found & changed that option now (it was in a different location). I'll resurrect this thread tomorrow with the outcome (It needs to be a cold cold boot). At the very least I now know what to google..."double post" hadn't occurred to me so even if it doesn't work its progress.

Thanks wabbit
 
HavocXphere said:
Schweet. First solid lead on this. I found & changed that option now (it was in a different location). I'll resurrect this thread tomorrow with the outcome (It needs to be a cold cold boot). At the very least I now know what to google..."double post" hadn't occurred to me so even if it doesn't work its progress.

Thanks wabbit
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Sure, hope you come right!:)
 
Its still double posting. :(

Lots of googling suggests that the best fixes involve sledgehammers and RMA'ing.

One guy says boosting tRFC >55 fixes it, thats what I'm trying next. Not holding my breath though...seems to be a general issue with p35 chipsets.
 
A couple of hours later I've figured out the [-]issue[/-] feature.

Its a combination of 2 things: Setting the AI overclock tuner from Auto->Manual and cutting power to the board completely.

There seems to be no way around it. It needs to be on manual to do an OC (getting access to FSB etc) and I need to cut power every night because my UPS has 50hz hum which is annoying when trying to sleep (PC is in bedroom).

The reason why you're getting it all the time is because when you cut complete power to your rig, your bios thinks that an overclocking failure has occurred so it resets the strap to Auto. The first boot re-applies the strap setting, the second boot commences normal posting. This is completely normal, but I suggest not switching off the power completely or even better grabbing a uninterrupted power supply (UPS) and using that. There is no need to cut power to your pc, in the long run it'll cause more harm than good. Keeping the board "charged" is the way to go.
Click to expand...

http://www.xtremesystems.org/forums/showpost.php?p=3284432&postcount=11
 
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