Overclocked / Won't Switch On

I tried overclocking my cpu and i think i have done something too it, the computer went to boot and then shut down, i've not been able to switch the computer back on since, have i broke something or is there life still in the computer?.

Edited by tomxlisa (Thu 25-Oct-12 17:27:59)

Have you tried removing the mains power cord?

Yeah removed the mains power cord, removed the motherboard battery, tried to clear the cmos and also removed the memory, put it all back and still won't switch on?.

If nothing is damaged reseting the bios should fix it. I am rather busy right now so google it or wait for someone else to reply with instructions on how to do that if you don't know.

Yeah i've done a clear bios and nothing is working still, so i take it something might be damaged?.

Disconnect everything (Both power and data cables) except one known good stick of memory, PS2 keyboard and monitor. If possible, fit a PCI graphics card and then try.

Edited by Deadbeat (Thu 25-Oct-12 21:21:46)

With power cable removed, remove BIOS battery for at least 30 minutes. Also short out the battery pins briefly in addition, this will make sure the CMOS is totally reset.

sounds like a popped board to me

Really hope not, i have had everything disconnected for several hours now, gonna try it again shortly, i didn't disconnect the keyboard or mouse though, and i also left the monitor connected, would this matter?.

Still broke, and won't switch on?.

I think you may of fried it, what voltages and cpu you trying to overclock? Is it still in warranty, may be able to get it replaced claiming ignorant to the fact that you fried it lol

Been trying to get my i2500k to 5ghz, it wont do it though, tried 4.8 still wont, it sits quite comfortably at 4.5 though, with 1.37 on the vcore no other battery tweaks needed.

EDIT actually this prompted me to try for 4.8ghz again, running stable in prine95 for an hour nearly, will leave it temps getting towards mid 80s at some points though, thats with an artic freezer pro h/s.

Edited by deleted (Sat 27-Oct-12 17:21:57)

Do you have a spare processor? If so, swap it out.

I don't have another cpu to try which is a shame, it hasn't turned out too bad though as i had already bought upgrade bits for my tower case which involved a new cpu/motherboard etc, so i have taken the old motherboard and cpu out now ready for the new bits to arrive, if i have fried the cpu would it have damaged anything else in the computer, i have just bought a new drive and hoping it hasn't damaged that too, what about the psu, would that damage also by trying to overclock?.

I think i may have done, it has turned out ok though as i had already ordered new upgrade bits for my computer so just means i am using my laptop for now, i am getting the intel i3 but i don't think i will bother to overclock again after what has happened, it is strange though as i have overclocked before but never done this, maybe it was cause i messed with the voltages.

In reply to a post by tomxlisa:

maybe it was cause i messed with the voltages.

That's the best way to fry a CPU. You also need to have a decent HSF and/or good airflow to match the voltage increases. My only successful overclock (I don't have the kit for messing much) is my current setup, but I did a fair bit of research before overclocking it. It was also an 'easy' overclock as far as overclocks go, in that the CPU was known for having the potential.

The PSU should be OK..... They are pretty resilient. However, the graphics card and possibly memory may have sustained damage.

overclocked mu i2500k to 4.8 ghz, using only 1.35 volts on the vcore. Prime been running all night for 15hours, woot!

This GA-Z68X-UD3-B3 is a bad boy for overclocking with a i2500k!

Perhaps now is the time to suggest you have a look at some statistics published by Microsoft Research as to how much instability overclocking introduces!

IT works, and runs at 4.8ghz, core temps are fine, I don't think theres going to be any issues here. I see something about windows 8 having issues but I'm not bothering with that waste of time os.

Did you get it fixed or identify the fault?

Please read my other thread regarding the asus motherboard, i took out the other motherboard as i thought it was dead, but got a new motherboard as i had already had one on order before i thought the other had blown, just built the other motherboard up but seems to be doing exactly the same as the old one, won't switch on.

You tried a different PSU?

No, that is the only thing i've not tried, but would it still be the PSU if the lights on the motherboard light up when i plug the power in?.

yes

If you over-clock your CPU you run the very real chance of it overheating. Contrary to popular myth, there is nothing in a computer that will enjoy running over 35 degrees C and many processors run at closer to 50 most of the time, which for any chip is asking a lot. the same applies to your PSU and yes parts of it may still run the low current components on the board but it may well have cooked the main regulators and be incapable of giving anything enough current to actually run.
When you select a PSU for a computer, I strongly suggest you over-rate it by at least 100 watts based on the total requirement from everything on the system. This calculator is pretty good at keeping you out of trouble in that area. Under-rated PSUs are the main cause of most failures in stock equipment,.. trust me, I've spent 35 years fixing them.
http://www.journeysystems.com/support/calculator/
You have probably blown the CPU as well, with heat and probable voltage spikes when the PSU fried.
If you really want a faster machine, do not over-clock the CPU, buy an serious upgrade, it works out a heck of a lot cheaper than replacing cooked ones that the manufacturers will always tell you "over-clock at your own risk",.. and for very good reason!

That last 'anonymous' post was mine, I just forgot to sign in first. Just as a background to my wee rant. I've been in computers since they were the size of a few decent fridge-freezers and took enough power to run a small town. Odd thing is, the mistakes made by a software genius saying they can get more out hasn't changed in all this time. They blow a lot of stuff to kingdom come, always have.
If we, the guys and gals who designed the hardware say it has a limit, we did actually test it and the limit is exactly where we said it was. If you must push the envelope, expect something pretty crucial to fail without much warning!
There is one other crucial motto we suggest you live by. RTFM.

In reply to a post by pbsolo:

Just as a background to my wee rant. I've been in computers since they were the size of a few decent fridge-freezers and took enough power to run a small town. Odd thing is, the mistakes made by a software genius saying they can get more out hasn't changed in all this time. They blow a lot of stuff to kingdom come, always have.
If we, the guys and gals who designed the hardware say it has a limit, we did actually test it and the limit is exactly where we said it was. If you must push the envelope, expect something pretty crucial to fail without much warning!
There is one other crucial motto we suggest you live by. RTFM.

Then your post is frightening for how long you've been doing it.