Increasing VCore Voltage?

hangar34

hangar34

hangar34

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28 Jul 2013
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Hi,

I have been having some problems with BSoD's on a system I took delivery of in March. I have already raised a WebNote with technical support regarding the issue and they have helpfully made some suggestions regarding further testing which I have provided responses for. However, as it is a bank holiday weekend I appreciate that the support department won't be able to help me until Tuesday. So, I am hoping someone may see this post over the weekend and offer some assistance.

The current state of my testing is a follows:

- I have run Memtest86 for 7 hours overnight - All tests passed, no errors.
- I have run Prime95 stress testing for 2 hours - No errors, no BSoD.
- I have run 'Heaven' GPU stress test - No errors. no BSoD.

Further investigation of my system's MEMORY.DMP file has shown an error caused by 'GeunineIntel' - WHEA_UNCORRECTABLE_ERROR (124). Research has shown that this is commonly caused by overclocking, particularly a vcore voltage that is too low.

My question is this...

Please can you suggest a vcore voltage that is an increase from what may be set already that is safe to use with my CPU?

I have a 'Titan Dagger' system, based on a Intel G3258 Anniversary Edition CPU.

Any help offered is appreciated as I would like to try an stablise the CPU for some gaming over this weekend.

Many thanks,

Steve
 
Each system will be set up with different Vcore so its not about suggesting a Vcore. Its about you just raising it slightly. Say its 1.25v set it to 1.27 for example.

124 error can also be IMC related voltages although in this case I doubt it with the memory in this system being very low OC. Maybe try VCCSA at 1.1v also to rule this out.
 
How much RAM do you have on the system? - the default 8GB shouldn't be IMC related but if you took the 16GB option it might be running the wrong IMC/VTT (VCCSA) voltage.

EDIT: With 124 BSODs I've heard first hand from an Intel engineer that there is an optimal relationship between IMC, VTT and VCORE and that if the delta is outside of that, either too close or too far (IIRC more than 0.3v for too far, no set figure for too close), it can cause a 124 BSOD, though some experienced overclockers are dubious.
 
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IMC is also IOA and IOD on this platform but I am sure stock or around 1.1v on these two also is fine. Just a touch on Vcore, VCCSA IOA and IOD at 1.1 and test.

Test means use your PC as you normally would you have already seen Prime 95 etc are effectively useless. Just play your games etc.......
 
Thanks for the replies 8 Pack/Rroff... especially on a Sunday :)

The system has the standard 8GB RAM.

I will raise the Vcore to 1.27 (it is currently 1.25) and set the IOA/IOD to 1.1 as you suggest and then use the system as normal. I'll post back with results.

Thanks for the help,

Steve
 
Try to keep stuff like IMC, IOA/IOD, VTT, etc. to 1.15 or less - it can have a fair impact on how hot the CPU runs and you shouldn't need more to get the system stable unless your running a ton of RAM and/or extreme overclock.

VCORE wise you should have a fair bit of headroom to play with if necessary - the cooler on that system should be good for any moderate amount of tweaking - while there are no guarantees anything upto ~1.33v should be safe, beyond that it becomes much more unpredictable.

EDIT: Try using something like HW Monitor to check voltages in different circumstances - it might be that while most of the time its stable your getting droop sometimes that pushes voltages outside the desired range.
 
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Right, I have changed the Vcore Override setting to 1.270.

Not sure what the VCCSA is, but the only references I could see in the BIOS to IOA/IOD and System Agent were Offset values, with a Min -1.000v and Max 1.000v, so I haven't set these to 1.1v as suggested. They are all currently set to Auto.

Does that sound right?
 
System Agent is basically the same as VCCSA. If its an offset that makes it a bit trickier - you'll need to use either the diagnostics section of the BIOS (Current status or PC Health) or a Windows program to find out what it is running at - usually 0.95 IIRC then increase it a little at a time (i.e. +0.05) to see what changes (its often in set steps rather than exactly mirroring the offset).
 
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I just wanted to thank you again for your help and suggested settings. Since implementing your suggested values, the PC has been rock solid with no further BSoD's.

Great stuff guys, cheers!
 
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