older I7 3770k at stock settings blue screens on start up, stock voltage not accepted?

I've been having a ton of trouble with one of my I7 3770k machines. I run a business and 9 of my computers have i7 3770k processors, I had them all set up with a minor overclock of 4.3ghz. I recently decided to set everything back to default settings on all machines, that's when i found the problem.

One of the i7 3770k refuses to run at stock settings, it's the first one i bought, quite some time ago. I've tried everything, and the only way to get it to boot into windows is to up the cpu voltage in the bios, it works perfectly every time as long as I give it extra voltage. I'm not even overclocking it, it's all on the default factory settings. I'm using Asus p8z77 motherboards in all computers.

So the default voltage is about 1.045 volts, crashes every time. I set it to use offset and auto and it still blue screens on start up. The only two methods i've found to stop the crashing is to either set voltage to manual and give it 1.2 volts, or to set voltage to offset with +0.2 volts, the only thing then is i find the cpu is drawing 1.3 volts in idle at desktop according to asus suite. Remember, this is running at stock speeds, no overclock, though it is ok with one if i applied it.

Is there something wrong with this cpu or is this all ok? It's either run at 1.2 to 1.3 volts, or it will crash. I had noticed previously on this specific computer that if I set the voltage below 1.15 even with no overclock, it crashed, whereas my other i7 3770k pcs readily accept this voltage even with overclocks applied.

The computer next to it is identical and running the same programs, both computers are under a fair bit of load, but it's the exact same amount of load each, same programs being ran. i7 3770k next to it is running at just 48 degrees and 1500 rpm fam at stock speeds and 1.045 volts. The i7 3770k that needs higher voltage is at stock speeds, 56 degrees and 2000 rpm fan.

One other thing to note is the i7 3770k that won't run at 1.040 voltage on stock i bought about 8 months ago, the newer ones i bought in the past 2 weeks all run smoothly at lower voltages, i don't know if they changed something with the production?

I bought this i7 3770k that won't run at stock speeds and default voltage about 8 months ago, do you think i should return it as defective?
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  1. Okay, not 100% sure, but:

    1. The OC might've "broken" the chip, and now it can't run at lower voltages.

    2. Try updating the BIOS, and if you have the latest BIOS, reinstall/flash it again. Then, try running the 3770K at stock settings again.
  2. ihog said:
    Okay, not 100% sure, but:

    1. The OC might've "broken" the chip, and now it can't run at lower voltages.

    2. Try updating the BIOS, and if you have the latest BIOS, reinstall/flash it again. Then, try running the 3770K at stock settings again.


    I tried the processor in a different but identical hardware pc, and the same problem happened immediately again. Crashing, wouldn't work at stock voltage, same fix worked again, this computer worked fine with the previous processor at normal voltage.
  3. I installed a brand new i7 3770k into the pc today, and it immediately accepted it with default stock settings and voltage, it's now running at normal voltage. Obviously the processor was the problem. It's about 8 months old, do you think they would replace it under guarantee?
  4. I believe so, as long as you don't tell them you overclocked it.
  5. I've never returned one before, it's about 8 months old, so what are my options? I've rma'd stuff but never months later under guarantee, not sure who to return it to.
  6. Sandy Bridge is for real Overclocking, Ivy Bridge has been terrible in my experience!
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