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i5 2500k Failing Core with 1.35 volts ! ? @ 3700mhz. Auto-Turbo boost fails too. What is going on here ?

post #1 of 14
Thread Starter 
Hey guys, just put together a new build and i'm having a problem overclocking this chip.

Is my chip bad, am i doing something wrong or possibly have a bad stick of Corsair Vengeance 1600 ? ( 16gb )

I don't see many of these chips being bad, does it happen much ? I would be glad to bring the dang thing back and exchange it if thats the issue. Testing every compnonent for hours isn't my idea of fun when i want to use my new system !!!thumb.gifwink.gif


For the record, this is my first attempt at overclocking a 2500k / Sandy bridge.
I can't see how pumping 1.35 volts for a mild 3700mhz overclock isn't enough not to mention 4200mhz that i originally tried.

Ok so i didn't get my Corsair H80 yet so i'm testing small overclocks with the Intel Cooler.
I see no reason why this should be affecting anything because the cpu isn't going over 80 and is not reaching thermal limit.

Here is what i've done and what is happening. I've also supplied some screenshots.

--Core #2 keeps failing when i run OCCT ( was starting at 4200mhz @ 1.35)

--Auto-overclock is also failing almost immediately

--@ 4200 mhz my Video Driver Failed and windows booted with 800x600

-- Windows 7 was going straight to "repair" on startup, so i was thinking SSD or RAM problem. Hasn't happened again yet.

--Bad Ram ?

I have tested each stick individually with Memtest and OOCT @ stock vaules and nothing failed (3300mhz) everything came out fine. I am a bit weary that the test didn't catch anything
because i've been having Windows Repair screens not being able to boot into windows ( it just kept looping untill i screwed around with it )
After the Windows repair came up, i was thinking my new SSD was bad....

450

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post #2 of 14
Thread Starter 
:/ I'm considering pulling the cpu and ram out and just swapping for new ones at microcenter. A bit of an impatient move but i have to
go there to get the h80 anyway. IDK...

up
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post #3 of 14
Did you run Memtest86+ to test the RAM? It seems suspicious that it's failing at 3700MHz, since that is just the turbo frequency and it should be easy to get all 4 cores running at that speed.
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post #4 of 14
Thread Starter 
isn't it odd !

I haven't used Memtest86+, i guess i should try that. I'll DL it now and pop it onto a memory stick.

I just used regular Memtest where you have to run multiple occurrences to test all the ram
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post #5 of 14
Thread Starter 
Running Memtest86+ just heading up to my second pass.

No errors so far (p_q) .. i'm going to run a few more passes

thank you for the suggestion kz26


I just don't get what is wrong with my Overclock...
The only thing i can think of now is either the chip sucks and i should exchange it, or i should
try overclocking with only one stick and see what happens.


this stinks...
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post #6 of 14
Bad RAM, and the Intel stock cooler. That stock cooler couldn't handle 1.20v on my chip. You're probably overheating.
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post #7 of 14
isnt 1.35 volts a little too much?
I dont need that much at 4 ghz in fact 10 volts lower im running at 1.2v i think
dont overdo it man just put enough volts
    
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post #8 of 14
Thread Starter 
Quote:
Originally Posted by pioneerisloud View Post

Bad RAM, and the Intel stock cooler. That stock cooler couldn't handle 1.20v on my chip. You're probably overheating.


I ran 5 passes with Memtest86+ with absolutely no errors. I'm considering the ram might still be bad or have problems even though it passed but then again i'm
not that seasoned in testing large amounts of bad ram modules.

Well good to know that the stock cooler didn't work out. I know it sucks BUT how could 83'c be overheating and causing an OC to fail ?

I can't see how the voltage would matter considering that %100 cpu usage on a h80 or noctua D-14 with a 4.5 or higher overclock would produce just as much heat
as the stock cooler running 3.7 - 4.0

Can you explain how your stock cooler didn't like 1.2 volts ? Was it just getting really really hot ( most likely haha ) or was it failing ?
Maybe i'm just completely wrong and a good cooler keeps the CPU cores stable with higher voltages ?
I remember my E8400 overclocking perfectly fine on stock cooler when i was just testing for fun before i got a better cooler. Obviously completely
different architecture.

I just would never run the stock cooler for long smile.gifsmile.gif .. just for experimenting for time being. 80-90'c is not nice haha

even 3600 is failing with about 1.25 volts.

My thinking could be off though, just saying. I have never experienced something like this before.

I mean no offense but just speculating. Even high 4.5ghz overclockes will run very hot with high voltage. I can't see there being much difference because of the cooler stopping an overclock ?
Unless of course it overheated to the point that it reached its thermal limit.

Turbo boost concludes 4,325 ghz Auto-overclock !!! .. It puts the voltage at 1.31 Load....

Default is 3.400mhz with 1.176 full load. There are absolutely no errors testing with OCCT.

Should i keep the CPU and ditch the ram and get my cooler ?... This chip might actually have potential.

I haven't heard of chips being faulty like this, but i could be completely wrong ?

This is so frustrating !!!!
Quote:
Originally Posted by 072665995 View Post

isnt 1.35 volts a little too much?
I dont need that much at 4 ghz in fact 10 volts lower im running at 1.2v i think
dont overdo it man just put enough volts

Thank you for the concern friend, just wanted to put a high safe voltage that i knew should be able to run the overclock without experimenting with lower voltages. It
was really a quick and dirty way of keeping it stable. 3.5 is the highest i would go 24/7. Maybe 3.56 on a very high stable overclock.thumb.gif
I doubt i would need 1.35 espeiclally for 3700mhz



I may play it safe and bring the Ram and CPU back to microcenter today for an exchange. Now i have to decide on a cooler.
Edited by OptimusPrime - 2/5/12 at 4:32am
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post #9 of 14
stock cooler is fine as long u dont do like 4ghz or something
i think ur cpu and ram is fine. yea 1.35 volts is probably way more than enough for 3.7ghz or something but no need to put it so high volts.
There is a rely complicated way of making oc stable
i forgot thread link so ill just post wat i did

Intel SpeedStep Tech: Enabled
Intel Turbo Boost Tech: Enabled
Turbo Boost Power Limit: Manual
Short: 500
Long: 500
Long Duration: 1
Again, only a limit. No limits for Overclocking, set to max.
Additional Turbo Voltage: Auto
Core Current Limit: 300
Spread Spectrum: Disabled
CPU Core Voltage: Offset Mode
Offset Voltage: (Set this to +0.05v for right now)
CPU Load-Line Calibration: Level 3 or Level 2 (whichever one will get you closest to BIOS Vcore)
DRAM Voltage: 1.5v
PCH Voltage: Auto
CPU PLL Voltage: Auto
VTT Voltage: Auto
then raise ur multiplier to watever u want it to be at
run prime95 for like 1 hour or so and if dont get bsod then ur fine
    
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post #10 of 14
^I did this with an ASRock board but shudnt be that much of a difference from asus
    
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  • i5 2500k Failing Core with 1.35 volts ! ? @ 3700mhz. Auto-Turbo boost fails too. What is going on here ?
Overclock.net › Forums › Intel › Intel CPUs › i5 2500k Failing Core with 1.35 volts ! ? @ 3700mhz. Auto-Turbo boost fails too. What is going on here ?