Prime95 pass Intel Burn Test fail?

[Macgruber]

so I got a bsod last night at 1.12v at 3.8ghz on my i7 2600k


so i upped to 1.25v and i ran prime95 4hrs torture test passed all no errors
i ran ibt failed on 3rd try and said my overclock is unstable to check my cooling...

for 4hours on p95 the max temp my cpu went was 61/62C and lowest was 35C

please help? :\ is ibt trolling me or am i confused

 

[Macgruber]

okay it trolled me. i just passed a custom, and standard with 10 test now im doing maximum

since i randomly got a blue screen overnight on 1.12v that means if the error is voltage that its basically too low of a voltage for the overclock?

also im at 1.13 now not 1.25v i made mistake

 

[Jovec]

since i randomly got a blue screen overnight on 1.12v that means if the error is voltage that its basically too low of a voltage for the overclock?

Probably. I remember my 705e (low power Phenom 2 variant) would fail p95 at stock volts.

 

[Yuriman]

If your PC BSODs when stressing it, your overclock isn't stable. Even if it's stable with Prime or IBT for a year, there may be other loads that use different parts of the CPU that may still cause a BSOD. It's probably a good idea to find your lowest Prime and IBT stable voltage and then bump the voltage up a notch or two just to be safe.

 

[Macgruber]

If your PC BSODs when stressing it, your overclock isn't stable. Even if it's stable with Prime or IBT for a year, there may be other loads that use different parts of the CPU that may still cause a BSOD. It's probably a good idea to find your lowest Prime and IBT stable voltage and then bump the voltage up a notch or two just to be safe.

yeah i wasnt getting any bsods while ibt/p95 was running

but when i was running a bot+game i got a bsod with error code 1e, im going to reformat tomorrow and unflash my bios back to its old state

i hate not knowing where im wrong

 

[BonzaiDuck]

Nobody else has said it yet, but this sounds a bit strange.

The OP says his i7-2600K is running at 3.8 Ghz -- the stock turbo speed without any overclocking.

He didn't say whether he'd fixed the VCORE manually, or if it was volted from an "Auto" BIOS setting.

It shouldn't fail either Prime95 or IBT under those circumstances, unless he fixed the VCORE manually at too low a setting.

Otherwise, I can imagine a scenario where Prime95 passes 4 hours under "Blend" and then fails IBT. It's also possible to pass 4 hours under small-FFT and then fail larger FFT in a shorter period of time. And those sequences would suggest either need to bump up VCORE or tweak RAM and VCCIO voltages -- without going into more specifics about it.

 

[Idontcare]

Nobody else has said it yet, but this sounds a bit strange.

The OP says his i7-2600K is running at 3.8 Ghz -- the stock turbo speed without any overclocking.

He didn't say whether he'd fixed the VCORE manually, or if it was volted from an "Auto" BIOS setting.

It shouldn't fail either Prime95 or IBT under those circumstances, unless he fixed the VCORE manually at too low a setting.

Otherwise, I can imagine a scenario where Prime95 passes 4 hours under "Blend" and then fails IBT. It's also possible to pass 4 hours under small-FFT and then fail larger FFT in a shorter period of time. And those sequences would suggest either need to bump up VCORE or tweak RAM and VCCIO voltages -- without going into more specifics about it.

I had not caught onto this fact - but this is EXACTLY what I experienced with my 2600k when I first bought it. Could not for the life of me get the 2600k to pass stably LinX/IBT.

I was convinced it was the CPU because of course I had already ran memtest+ to confirm the ram was stable and OCCT to confirm the GPU was stable and Prime95 large FFT to confirm the mem controller and uncore were stable.

The only thing it would not pass was LinX/IBT.

And then I discovered HCI memtest. HCI memtest detected memory errors in my ram, but nothing else would detect the errors. So I underclocked my ram until the HCI memtest errors went away (stock was DDR3-2133, I underclocked to DDR3-1866) and then I discovered my 2600k suddenly could pass LinX/IBT without issues, even when I overclocked all the way up to 5GHz.

So I RMA'ed the ram and sure enough the new sticks work at DDR3-2133.

It was the ram all along, and the problem was manifesting itself in causing IBT/LinX to error out, but memtest+ and prime95 could not detect the issue. Only HCI memtest was able to isolate the issue to the ram.

To the OP - checkout the OC'ing guide sticky, it has a link to HCI memtest plus some operating tips contributed by members in the thread itself.

 

[Macgruber]

so I got a bsod last night at 1.12v at 3.8ghz on my i7 2600k


so i upped to 1.25v and i ran prime95 4hrs torture test passed all no errors
i ran ibt failed on 3rd try and said my overclock is unstable to check my cooling...

for 4hours on p95 the max temp my cpu went was 61/62C and lowest was 35C

please help? :\ is ibt trolling me or am i confused

Nobody else has said it yet, but this sounds a bit strange.

The OP says his i7-2600K is running at 3.8 Ghz -- the stock turbo speed without any overclocking.

He didn't say whether he'd fixed the VCORE manually, or if it was volted from an "Auto" BIOS setting.

It shouldn't fail either Prime95 or IBT under those circumstances, unless he fixed the VCORE manually at too low a setting.

Otherwise, I can imagine a scenario where Prime95 passes 4 hours under "Blend" and then fails IBT. It's also possible to pass 4 hours under small-FFT and then fail larger FFT in a shorter period of time. And those sequences would suggest either need to bump up VCORE or tweak RAM and VCCIO voltages -- without going into more specifics about it.

the processor runs stock at 3.4ghz, and 3.8ghz is just turbo boost,

the 2600k does not run at 3.8ghz stock

also the OP(myself) did specify that i set vcore in bios, you just didnt read it

i might not be crystal clear but i sure did write what you say i didnt also, did you not read my other post where i passed ibt?

okay it trolled me. i just passed a custom, and standard with 10 test now im doing maximum

since i randomly got a blue screen overnight on 1.12v that means if the error is voltage that its basically too low of a voltage for the overclock?

also im at 1.13 now not 1.25v i made mistake

i appreciate you "trying" to help, but its more frustrating answering someone who doesnt read a full post instead of post possible solutions, thank you for your "help"


edit- ram is running XMP which its at 1866mhz, and VCVIO voltages i have no clue what that is please feel free to share, im not good with abbreviations or terminology for bios settings.

i have internal pll voltage off, turbo boost off, enhanced turbo off, c1e support off, the speed one off and all the other voltage changing/power saving features, eist is also off

cpu now shows me running 1.120v @ 3.8ghz constant, been running for 6hours, seems yesterday after 12 hours comp pooped so i raised voltage 0.05 again

 

[Macgruber]

should i just reformat, flash bios to older bios, reinstall aeverything or keep testing to see if its my voltages giving random blue screen after half a day of cpu running?

 

[Yuriman]

You almost certainly need more voltage. Bump it up to 1.15 or 1.17. You'll know very quickly whether or not it's the voltage if you give it a healthy increase and it becomes stable.

What is your reported load voltage in CPU-Z (after vdroop)?

Also, I recommend using offset instead of a fixed voltage.

 

[Ed1]

why not just see what auto voltage is at that slight OC . and see if that is stable .
1.12 sounds little low for SB , I think .
Also are those voltages with it under load as it probably goes down at bit or at least fluctuates .

 

[Macgruber]

You almost certainly need more voltage. Bump it up to 1.15 or 1.17. You'll know very quickly whether or not it's the voltage if you give it a healthy increase and it becomes stable.

What is your reported load voltage in CPU-Z (after vdroop)?

Also, I recommend using offset instead of a fixed voltage.

its stable now, does all tests ,but randomly after 12-20hours it might blue screen when im afk so i guess it really isnt stable?

why not just see what auto voltage is at that slight OC . and see if that is stable .
1.12 sounds little low for SB , I think .
Also are those voltages with it under load as it probably goes down at bit or at least fluctuates .

i think its pretty much constant, i turned off all the settings to fluctuate voltage / downclock to save energy


--- its saying 1.120v in CPU-Z, in bios i have it set t o 1.135v , also can you please help me wit hthe vdroop? i did not touch that at all

ty so much for posting guys , vdroop offset is set to auto

 

[Macgruber]

also when i run prime it drops to
1.112 and 1.104
edit- im doing this on large fft test

 

[Macgruber]

ok so on auto it shows 1.136v under load with p95 large ffts and 1.152v without

i dont understand, i manually set the voltage to 1.135v and had less volts read in cpuz does this mean i should raise the bios one to 1.25 or 1.3 or something?

should i enable internal pll overvoltage for this small overclock? its not even a real overclock just OC'ing to keep the max stock stable turbo boost speeds constant (

 

[Ed1]

ok, for vdroop you can do 2 things , 1) leave the LLC alone and just raise vcore till you are stable .
2) you didn't mention MB type, does it have LLC settings , if so you could try going to say a high (which would be bumping up a few values depending how your MB is designed).
due note your vcore will go up even when idle by small amount with raising LLC settings .

whichever way you go (depending on settings available ) as Yuriman said go to a off-set mode to save, lower voltage at idle conditions .
I would also enable speedstep and C1E modes, might as well run 1600mhz at idle times with even lower voltages, but do this after you got vcore setup .

 

[Macgruber]

ok, for vdroop you can do 2 things , 1) leave the LLC alone and just raise vcore till you are stable .
2) you didn't mention MB type, does it have LLC settings , if so you could try going to say a high (which would be bumping up a few values depending how your MB is designed).
due note your vcore will go up even when idle by small amount with raising LLC settings .

whichever way you go (depending on settings available ) as Yuriman said go to a off-set mode to save, lower voltage at idle conditions .
I would also enable speedstep and C1E modes, might as well run 1600mhz at idle times with even lower voltages, but do this after you got vcore setup .

im working on the vcore i just bumped it to 1.15 im getting 1.136v in cpuz and 1.120v when under load

this computer will be running games and bots 24/7 so i need it to have the constant voltage/cpu speed so it doesnt affect the programs, i know it will "save power" if i didnt but am i taking that much of a loss for keeping a constant speed?

 

[Macgruber]

i dont know what i did but now cpu-z shows 34 x 100 and bios shows 38 x 100.... :/
i guess thats what "Power technology" feature did when set to disabled from custom lol

 

[Ed1]

you never mentioned your MB model .
internal PLL overvolt, I would leave it at default (on my MB P8Z77v pro) default is auto, on and I am with small oc too .

But yes, just raise it a bit and test it and see, if vcore is dropping under load you have to compensate wither with load line correction or raising vcore .

 

[Macgruber]

you never mentioned your MB model .
internal PLL overvolt, I would leave it at default (on my MB P8Z77v pro) default is auto, on and I am with small oc too .

But yes, just raise it a bit and test it and see, if vcore is dropping under load you have to compensate wither with load line correction or raising vcore .

so should i do one or the other or both?

i thought the processor would always drop voltage a bit when under load? so i need to find a voltage where under load it doesnt drop V at all regardless of IBT / p95?

(under load i refer to using ibt and p95, seems when i run everything on pc the voltage stays same)

 

[njdevilsfan87]

I use P95 to quickly get me to around where I need to be, and then IBT as the final test of stability. For me, P95 will make my setup look stable for hours, but IBT could then BSOD it within a few minutes.

I find IBT to be much better for stability testing when it comes to SB. I've had this happen across three different systems - 2500K, 2600K, and 2700K, so it wasn't some fluke.

 

[Yuriman]

Really you just need enough voltage. Don't be shy with it, 1.30v (as reported by CPU-Z) loaded is not unreasonable, 1.12 is super low.

 

[Macgruber]

Really you just need enough voltage. Don't be shy with it, 1.30v (as reported by CPU-Z) loaded is not unreasonable, 1.12 is super low.

i put internal pll overvoltage on auto is this bad?

so youre saying bump up vcore in bios untill my LOAD is 1.13v ? so basically like a 1.152v idle?

or are you saying v1.3 ? that seems alot shouldnt i use lower voltage for small overclocks?

if i try to get 1.3v in cpuz i would probably have to raise my bios from 1.15v to probably 1.5v that seems like a huge jump

I use P95 to quickly get me to around where I need to be, and then IBT as the final test of stability. For me, P95 will make my setup look stable for hours, but IBT could then BSOD it within a few minutes.

I find IBT to be much better for stability testing when it comes to SB. I've had this happen across three different systems - 2500K, 2600K, and 2700K, so it wasn't some fluke.

yeah im able to pass both of them right now on the low voltage im running but after 12-20hours i dont know what computer triggers for screen, i did standard / maximum / custom on ibt and i did small / large / blend on p95

im trying to keep near the stock voltage (which i cant even remember anymore) lol

 

[Yuriman]

i put internal pll overvoltage on auto is this bad?

so youre saying bump up vcore in bios untill my LOAD is 1.13v ? so basically like a 1.152v idle?

or are you saying v1.3 ? that seems alot shouldnt i use lower voltage for small overclocks?

if i try to get 1.3v in cpuz i would probably have to raise my bios from 1.15v to probably 1.5v that seems like a huge jump



yeah im able to pass both of them right now on the low voltage im running but after 12-20hours i dont know what computer triggers for screen, i did standard / maximum / custom on ibt and i did small / large / blend on p95

im trying to keep near the stock voltage (which i cant even remember anymore) lol

iPLL overvoltage is not likely going to make a difference unless you're trying to push your chip past 4.5ghz. Auto is likely to leave it off, I wouldn't worry about it.

Really what I'm trying to say is, if you need another 0.20v to make sure your game server doesn't randomly reboot on people, don't fret about giving it a little bit more voltage. You're way below what is considered the safe upper limit.

 

[Macgruber]

iPLL overvoltage is not likely going to make a difference unless you're trying to push your chip past 4.5ghz. Auto is likely to leave it off, I wouldn't worry about it.

Really what I'm trying to say is, if you need another 0.20v to make sure your game server doesn't randomly reboot on people, don't fret about giving it a little bit more voltage. You're way below what is considered the safe upper limit.

so am i safe or are you saying its bad because im so under?

ive been running almost 24hours now with progs/bots/games running and hopefully no random bsod tonight

1.136v in cpu-z and v1.15 in bios

if i can run stable at this should i keep it? i misunderstood something earlier about the load dropping, seems whatever vcore i set, when i run p95 my load drops like .20v :0 i didnt understand that, so there is a voltage that i set where when i run p95 my voltage wont drop or fluctuate at all?

XD i know i can be coinfusing, please help me understand

 

[Yuriman]

If it's stable, you're good, but be aware you have a lot of safe headroom for increasing voltage if necessary. You probably have room for a few hundred mhz more while still within safe voltage ranges.