4790k hitting 4.8ghz?

[h7779]

Just overclocked the 4790k to 4.6ghz at 1.256 volts. I have been running Aida64 for the past 8 hours and there is no problem so far, temperature are around 67c with occasional spike up to 75c. However, when it I try to push it to 4.7ghz I need at least 1.312 volts for it to run Aida64.

Is anyone else having this problem or is it just me?

[TheSLSAMG]

That's what some of us call the voltage wall. My CPU can hit 4.7GHz at 1.28 fine, but takes 1.35 to go to 4.8. It's the luck of the draw.

[Enderman]

Thats how CPU overclocking works.

At a certain point you require more voltage to increase the clock speed.

[MegaDave91]

The point at which you need a significant amount more voltage for a mere 100mhz higher overclock is when it's not worth it. 

[harrynowl]

I like to call it the brick wall of Haswell. Or maybe just Intel's 22nm Tri-Gate technology as a whole as Ivy-B was like that too.

[lx_srs]

Just overclocked the 4790k to 4.6ghz at 1.256 volts. I have been running Aida64 for the past 8 hours and there is no problem so far, temperature are around 67c with occasional spike up to 75c. However, when it I try to push it to 4.7ghz I need at least 1.312 volts for it to run Aida64.

Is anyone else having this problem or is it just me?

It's the luck of the silicon lottery, bro.  Some chips are fantastic, others are not so great.

[h7779]

Thanks for the info guys.