unstable overclock, bit of help please

bullzeye

bullzeye

bullzeye

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Hoping one of you lot can help me out

Out of bordem last night i started watching vids on youtube about overclocking i5 2500k , it seemed fairly straight forward so thought id give it a try

anywayz, i followed a video, who had same specs as me, i5 2500k on a p8z68-v pro Mobo, set multiplyer to 45, with a voltage core to 1.350, changed a few other settings too, saved profile and booted up the pc

i downloaded and installed prime95, and left that running overnight (Approx 10 hours), with no errors at all temps did not go above 55 degrees, (corsair h100 cooler)

so i thought i had cracked it, but after spending a few hours on farcry 3, with no issues i deceded to stick a blu ray on, i then got blue screen of death twice, one half way through the movie and one 10 mins before end.

what do you think i should do?, load optimzed defaults?

i find it strange that my pc dident crash under load for 10 hours, but then crashed watching a blu ray twice

any ideas would be appreciated.


TOWER CASE: Corsair Obsidan 650D
Processor: i5 2500k
COOLER: Corsair H100
MOTHERBOARD: P8z68-v PRO
MEMORY: 16GB Corsair Vengeance
GRAPHICS CARD: Palit Jetstream GTX 670 2GB
SOLID STATE DRIVE (SSD): Corsair Neutron 120GB
HARD DRIVE (HDD) :Samsung Spinpoint F3 1000GB
POWER SUPPLY: Corsair TX850
 
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If you run something like CPU-Z or HWInfo when running prime what does it show as your actual Vcore? 1.35 seems a little high for 4.5GHz but the actual voltage supplied under load may drop a little.
When you had the BSOD, what were the final numbers/letters in the code? If you let us know what they are then we can point you in the right direction.

http://forums.overclockers.co.uk/showthread.php?t=18478977&highlight=bsod+codes
http://forums.overclockers.co.uk/showthread.php?t=18479215&highlight=bsod+codes
http://forums.overclockers.co.uk/showthread.php?t=18479265&highlight=bsod+codes
 
Hi jotta really appreciate that info, regarding the vcore when prime is running ,according to hardware monitor its fluctuating between 1.36 and 1.37

just had the error again does this help

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 2057

Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA800D05D028
BCP3: 00000000BE200000
BCP4: 000000000005110A
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\012513-10436-01.dmp
C:\Users\dean\AppData\Local\Temp\WER-12698-0.sysdata.xml
 
0x124 = add/remove vcore or QPI/VTT voltage (usually Vcore, once it was QPI/VTT)

Im running 4.5GHz at 1.32 under load. Perhaps try knocking the Vcore back a little and see what happens.

Alcso make sure you are looking at Vcore and not core VID.
VID is the voltage the chip says it wants but Vcore is the voltage you are giving it.
 
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ok lowerd the vcore to 1.320, running prime95 vcore fluctuating between 1.34/1.35
min 1.31 max 1.34

temps are

core0 min 31 max 55 load 100
core1 min 33 max 59 load 100
core2 min 31 max 59 load 100
core3 min 35 max 59 load 100
 
wazza300 said:
you wanna learn to use offset cpu voltage,so that the cpu clocks up and down in speed/voltages according to load

at idle it will use less power and run cooler

heres a guide i posted a while back,should be similar for 2500k but enter your own ram speed/timings/voltages

http://forums.tweaktown.com/asus/47510-asus-z68-v-pro-4-5ghz-bios-screenshots.html
Click to expand...
i will have a read up, thanks for the link, although im very new to all this, it was a huge step for my messing with the multiplier! lol
 
try lowering it a little more till you get 1.32 under load. Temps will be even better if it is stable.
FYI, im running a + 0.065 offset where the BIOS is showing a 1.230 voltage. This gets me to 1.32 - 1.328 under load and is stable.
 
Just bsod again as I was viewing forum so im using my phone to type this . Looking at my bios now shall I try lowering it more don't understand offset im new to this . I probly shouldent if messed wjth it in first place. Hate seeing bsod if I can't sort it out will optimised default reztore it to how it was?
 
yeah,only use small amounts of offset keeping the first two digits 0

that amount gets added to the default cpu voltage aswell as what level loadline calibration you use,to check look in cpu-z while stressing the cpu and adjust the llc or offset untill you get close to your stable voltage 1.328v ect
 
well back on pc now, i tried lowering it to 1.310, but pc bsod on boot up, then tried the setting your running offset +0.065, and it booted up so thats a start lol

well opened cpuz and voltage shot up to 1.47 underload, what would you suggest lowring the offset to?

when system is idle vcore is 1.07
 
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optimised defaults will take you back to safe default settings. What was the BSOD code this time?
I had trouble getting my head around offsets etc and the BIOS on my board is pretty naff and doesnt have a lot of settings talked about on the forums ( pll etc )
The BIOS on my board sets the core voltage depending on the multiplier I set. I have it set to 45x on the multiplier and the BIOS set the Vcore at 1.230 volts. I then add a + offset of 0.065 which technically gets me to 1.295 volts but it actually ends up as 1.32 volts under load.
I dont know how/why it does this but it was the setting I found that was stable for me. A little bit of trial and error.
Good luck.

Just as a side note, if you set multiplier to say 43 and then leave all other settings on AUTO, what Vcore do you get under load?

I found it easier to start playing with the Asus TurboV Evo software to see what voltage the system liked and then went in to the BIOS to try to duplicate it.

Your in good hands with wazza on the case. Off to walk the dogs, Good luck!
 
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Try with +0.005 or +0.010v offset,each chip is different in how much or less voltage it needs

Enable x.m.p for your memory aswell
 
I decided to f5 to default, i really have not got a clue about overclocking, the videos teased me :P

im scared of blowing my machine up, its my pride n joy! and when i saw the voltage go to 1.47 that did it for me
 
wazza300 said:
Try with +0.005 or +0.010v offset,each chip is different in how much or less voltage it needs

Enable x.m.p for your memory aswell
Click to expand...
hi wazzer, after defaulting, im not sure what to do now?

id have to watch the video again to get the settings right then change the offset at end. ill let you know the outcome if i decide to do it
 
Just copy the settings I posted in the link but enable x.m.p for your memory,this will automatically set the timings and voltages for you
 
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