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overclocking problems

post #1 of 5
Thread Starter 
I am posting here for a friend, regarding his recent technical difficulties.

His component list is:
Intel Core I5 2500k with Thermaltake Frio HS/F
evga 660TI geforce
8GB Kingston HyperX Limited Edition 8GB 4GBx@GB @ 1600mhz
1TB HDD (games)
250GB HDD (music)
64GB SSD (operating system)
GIGABYTE 268x-UD4-B3 motherboard
ANTEC high current gamer HCG-750w PSU

he overclocked his cpu from 3.3 ghz to 4.4 ghz. After three days of monitoring the temperature and ensuring that it was normal, the entire system crapped out.

Initially we thought that the issue revolved around the bios because it broke right after him disabling secureboot for Windows 8.

The issue consists of the setup doing absolutely nothing but displaying the phase LED's, with the top one being red and the bottom three being yellow, flashing every three seconds.

We have attempted a full CMOS reset, ruled out the majority of the components, and came upon the conclusion that it could indeed be something hardware related, I was wondering what your opinion on this is.
post #2 of 5
What have you tried besides CMOS reset?

Have you tried re-seating the CPU? Have you tried one stick of memory? Have you tried one HD? Have you tried different GPU? Do you have another Sandy Bridge CPU around to see if it boots with a different CPU? (It's now a process of elimination)

What voltages were you at when you were trying to run it at 4.4GHz? Did you use an auto overclock feature or did you do it yourself. When monitoring the temperatures what program did you use. Did you try stress testing the overclock to see if it was stable. Do you have another computer available to try for a Bios update if perhaps you are able to get into the bios. Did you look at the manual to see if it has a guide on specific LED "debugs" where it states what problem is what based on certain lights.

Again, if it's hardware related, I wouldn't point fingers at the "overclock" itself unless you overvolted it to all hell. That PSU is also a nice PSU, as it's on OCN's recommended PSU so it being PSU failure is also inconsistent.
post #3 of 5
Thread Starter 
We have not tried re-seating the CPU. We ran memtest on all of the ramsticks as well as trying the one ram stick method. We did try a completely naked boot without anything on it except for the bare essentials required so see if the setup is alive. We do not have a different CPU available for this machine. We did not try a different GPU, and currently do not believe that it is the issue, not to say that it is impossible. At one point we tried a full CMOS reset while using the jumper, during a completely stripped down boot. The led's changed behavior from flashing every three seconds to being solid, while not changing in color. The motherboard started giving error beeps, which was thought to be an improvement from it being non responsive and completely silent beforehand. It first gave error beeps about the graphics card not having power due to my friend accidentally not connecting the cables to it. It then gave error beeps about a missing keyboard, which were fixed quite quickly. The motherboard then suddenly reverted to the old behavior, being completely silent with flashing LEDS.
the phase LED's on that specific motherboard model indicate power consumption, the manual does not say much more about them.

The overclocking voltages were not known, but it was definitely a manual overclock, the onboard case display was used for the temperature monitoring, no stress testing of the overclocking was done, the issue appeared about three days later after the overclock, right after disabling secureboot in the bios.

My friend does have a spare machine available for assistance, while unfortunately considering that the system is currently completely unresponsive, and does not go passed a completely blank screen.
post #4 of 5
Quote:
Originally Posted by Genkaz View Post

The overclocking voltages were not known, but it was definitely a manual overclock, the onboard case display was used for the temperature monitoring, no stress testing of the overclocking was done, the issue appeared about three days later after the overclock, right after disabling secureboot in the bios.

My friend does have a spare machine available for assistance, while unfortunately considering that the system is currently completely unresponsive, and does not go passed a completely blank screen.

There's your problem. If you don't know what the voltages were, then that spells disaster. With adequate cooling, and/or proper fail safe methodology (Intel will lower clocks if temps get too high, if you have that enabled) you can pump up to 1.55-1.60v in these Sandy Bridge CPU for quick bench runs. Now, having it that high for extended periods of time is a completely different story and will indefinitely lead to CPU failure. It scares me that you have no idea what the voltages were in the slightest. I find it pretty unfortunate that you decided to dive into overclocking, without 1) Knowing what voltage you were running it at 2) not stress testing 3) Not using the proper tools to see what voltages and temps you were at (RealTemp, CPU-Z).

Disabling secure boot wouldn't not let you boot the computer to the BIOS, you might have a problem getting into Windows but not into the Bios. After resetting CMOS, defaults would have been enabled and then that "disabling secureboot" concern would have been a non-issue. This is hardware related hate to break it to you.

But I will leave it down to the most likely possibilities; 1) CPU 2) Motherboard 3) GPU 4) PSU. Figure out a way to test all of these and you will find your culprit.

It also could all be a coincidence which is likely, where it may have seemed like it was one thing that sent it on the fritz but in all reality had nothing to do with it and one component just failed.
post #5 of 5
Thread Starter 
Thank you immensely for your help. We were reasonably certain that it was a hardware issue after all of the tests, good to have someone confirm it.
Edited by Genkaz - 10/10/13 at 12:37am
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