I5 3570k Voltage Help

So I'm quite new to overclocking. I currently have my i5 3570k running at 4 GHz with a voltage of 1.15 V. I'm planning on doing a 4.5GHz overclock (cooled by a CM Hyper 212 EVO). One of my questions is regarding voltage. What voltage shouldn't I exceed with an Ivy Bridge CPU?

Also, I have the load line calibration set to level 5 on my motherboard (ASRock Z77 Extreme 4), yet I still see some drops in voltage. According to CPU-Z the usual voltage is 1.136 V it idle. If I run Intel Burn Test or any form of stress testing I see the voltage dropping to 1.08 V. Is this normal or have I somehow configured LLC the wrong way around or something?

I'm also aware Ivy Bridge CPUs doesn't overclock as efficiently as Sandy Bridge ones, but I had no choice really. There were no local stores that were stocking 2500Ks any more (I live in Australia).
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More about 3570k voltage help
  1. Here is a guide for you.

    The Ivy Bridge cpu is noted for temp problems once you start adding voltage in the higher speeds. This article might help.

  2. You should hit 4.5ghz @ 1.24.....

    Check my system and at full load I hit 70-80C. I also hit 4.9ghz @ 1.33V 75-85C and IMO 1.4V is the abosulte max but others will tell you differently.
  3. Alright, thanks. That guide looks very helpful and detailed. By the way I found myself BSoDing at boot with the voltage set to 1.24, 1.25 and 1.26 though, prior to starting this thread. Hopefully that ASRock guide will help me get it correct.
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