going over 4.5?

dh131286

dh131286

dh131286

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18 Apr 2012
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im new to overclocking so bear with me.
im using a 2500k and p8z77-m pro.
i am currently running a stable 4.5oc using vcore offset. under load im getting 1.360-1.376v most of the time, it went up to 1.42 for a second then dropped back to 1.360-1.376. but this seem stable after running prime.

if i up the oc to 4.7 using offset vcore unless i really over volt it i get bsod 124.
when i set the voltage to manual and run it at 1.38 it seem to be stable.

id really like to use the offset vcore so that the voltage drop when on idle but if i was to use manual vcore permanently set at 1.38 would this cause any issues.

i dont seem to be seeing temps over 62 degrees c.

thanks
 
It wont cause any problem running constantly at 1.38 apart from higher heat + power consumption.

See what temps you get if you bump the offset voltage a touch.
 
A few people do have troubles with stability when going from the low power state to the full core voltage. I tend to turn off my low power states and core parking too.
 
What are your offset and LLC settings?

Potentially you will need to notch up your LLC to allow a greater range of volts to VCore whilst reducing your offset to make sure this doesn't exceed your chosen maximum. However it is best to try to keep a positive offset as near to 0 as possible so sometimes this can mean reducing LLC and increasing your offset.

For a max of 1.4v on my P8Z77-V Pro I have and offset of 0.005 with Very High LLC at a guess for 1.38v I would be looking at a High LLC with an offset of 0.020.
 
ive scapped everything i done and have started from scratch.

im trying again to find a stable voltage. at 4.5 im setting the bios to manual at 1.380. in cpuid its reading at 1.368 when using prime. So if that is my stable voltage. how do i go about setting the offset correctly? thanks
 
It's a shame you didn't respond to my post before scrapping your settings as it would have been easier to have assisted you when you had some settings to work from. I'm assuming you didn't understand what I'd written so I'll try to explain it better.

Your chip has a table of voltages which it applies at any given speed when voltage adjustment is set to Auto, offset works by applying a positive or negative value against these settings. So your first step is to set your voltage to Auto at your chosen speed and stress test to find out what the chip is programmed to supply. If you know what the chip actually needs at your chosen speed (1.368?) you subtract this from the Auto voltage to get your initial offset figure.

You don't want a negative offset becuase this will be applied against all voltages including idle so will potentially affect system stability when idle, and you don't want too much of a positive offset as this means your CPU constantly running at a higher voltage than neccesary defeating the purpose. This is where the LLC setting comes in, as it is used to increase or decrease the range that the CPU voltage can fluctuate under load.

For example if your CPU on Auto is supplying 1.380 and you want your voltage to be 1.368 then your starting offset is -0.012 but because a negative offset will potentially cause stability issues you need to address this. Lowering your LLC setting will mean that your CPU gets less surplus volts under load so you have to raise your offset to compensate. On my board a notch of LLC makes about a 0.040 difference to load voltage so in this example I would lower my LLC by one notch meaning I have to adjust my offset by +0.040 which will give me a new offet of +0.028 (-0.012 + 0.040). This means my system will now be stable at idle whilst still getting the required volts under load.
 
thanks pieeater.

these are the setting i have for a stable 4.5

ai tuner- manual
blck-100
turbo ratio- 45
pll overvolt- enabled
mem frequency- 1333
power saving- disabled
dram- auto
speed step- enabled
turbo mode- enabled
c1e- auto
c3- auto
c6- auto
cpu llc- high
cpu voltage frequency- manual
cpu fixed frequency- 350
cpu spread spec- disabled
cpu phase- extreme
cpu duty- tprobe
cpu current cap- 140%
vcore- offset- auto+
vccsa- auto
pll- auto

thats the settings i have. whilst under load on prime95 i get 1.368-1.376v. temps of 55 degress max. this has been running through the night on prime.
 
well i little update from the post above. as i said all was good running prime over night.. started to play sleeping dogs about 10 mins playing and i get bsod error 124... is there anything i can change in the setting above to help this? thanks
 
In all honesty I'd be tempted to leave things as they are if you're happy with 4.5GHz as volts and temps look ideal on auto, though as you're not pushing the bounds of stability I don't think you need pll overvolting enabled.

Seeing as your chip copes well with 4.5GHz Have you tried running at 4.7GHz? You might need to change llc to very high but your other settings should be good, keep an eye on voltages and temps.
 
dh131286 said:
well i little update from the post above. as i said all was good running prime over night.. started to play sleeping dogs about 10 mins playing and i get bsod error 124... is there anything i can change in the setting above to help this? thanks
Click to expand...

You probably need more voltage than the chip is asking for, so introduce a positive offset of 0.005 and up it incrementally until you are stable. Alternatively you could increase LLC to very high which will supply more volts on the top end but you will need to keep an eye on temps and voltage as they will increase.

/Edit - Probably best to up LLC to Very High as this will enable you to see what voltage your chip needs under load then you can work out your offset should be, set it and put LLC back to High.
 
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this is what im getting. looking back through all the dmp files its the same as this one.

Dump File : 092512-18174-01.dmp
Crash Time : 25/09/2012 13:16:43
Bug Check String :
Bug Check Code : 0x00000124
Parameter 1 : 00000000`00000000
Parameter 2 : fffffa80`077d8028
Parameter 3 : 00000000`be200000
Parameter 4 : 00000000`0005110a
Caused By Driver : hal.dll
Caused By Address : hal.dll+12a3b
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+7f1c0
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\092512-18174-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7601
Dump File Size : 277,088
==================================================
 
124s and 101s are generally voltage related so as suggested set llc to very high to allow more volts and set cpu duty to extreme doing this will mean you'll get a better idea of what volts are required so you can work out what you need for 4.5Ghz and 4.7GHz if you wanted to try for it.
 
1.408v seems high for 4.5Ghz, change your LLC back to high and you will be looking at an offset of around +0.030 for the voltages you were seeing, I would try +0.020 and see if thats stable in Sleeping Dogs, if it is reduce it a notch and test again if it isn't up it a notch .........

/Edit - Have you disabled pll overvolt? I don't think this will be helping your readings.
 
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pll overvolt is enabled. it tried uping the llc to extreme to see what happens and the volts go into the 1.5's.

i have noticed there is a bios update for the board so will do that first then play about with the voltage. i also had a couple bsod same code whilst the computer was idle at 1.368v
 
you said to put the to very high to see what volts the cpu pulls through to run as it was getting bsod 124 at 1.368. so how can you say when i try very high and it pulls through 1.4 that its too high voltage. i dont understand that
 
124 is VCCIO voltage first and foremost after that it can be CPU Vcore. For me you need to find teh chips sweet spot in terms of PLL this is often lower than stock and alllows Vcore to come down at the same time. (Infact where is VCCIO??? thats memory controller voltage on ASUS ROG boards)

Experiment with PLL voltages.

Also disable C states.

The only thing Prime shows is a system can run prime. Forget synthetic stability tests and use your system as you would normally then you find out if its stable or not for the tasks you perform.
 
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hi the i foud the vccsa in the bios its set to auto. or you can select =.010 and upwards etc. if you say the 124 is vccio then what shall i do with that. as i said it was stable in prime. i played a load of games yesterday as thats what the comp is going to be used for. played for a number of hours and no bsod.

i turned the comp on this morning. moved the mouse and i get 124 bsod again. i cant see why under load it seems to be fine but not at idle
 
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If you want to keep using offset (which is advisable imo) and you want to keep all the energy saving features on (which is advisable imo) all you need to do is bump the offset voltage up a bit.

Once you reach 4.5ghz+ you need to start using + offset rather than - offset as other wise you will get idle crashes like 124 bsod.

I had a similar problem when overclocking to 4.7ghz.

I was running LLC of ultra high +offset of 0.30+. This was stable, passed intel burn test 20 runs very high etc. but the pc would randomly bsod.

I fixed it by using LLC of High and increasing off set to 0.60+. Now im fully stable and i dont get any random crashes.

My volts are exactly the same, however when my computer is idle it has an extra +0.30 volts running through it, stopping the 124 bsod.

Hope this helps. :)
 
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