4790K OC to 4.8Ghz or 5.0Ghz, need voltage advice.

[TheNaitsyrk]

Hiho,

I'm currently running 4790k 4.6Ghz on 1.2V. Got H115i with extra fans to cool it down, temps are decent.

What voltage should I apply to get 4.8Ghz while considering that 1.2V gives me 4.6Ghz (Haven't tested 4.7Ghz on 1.2V).

 

[Spectre694]

You'd have to try it. Probably looking at closer to1.4 ish or so if it even will do that (temps will likely get out of control well before 5.0). Voltage requirements go up very quickly after a certain point. Not that I really recommend running the voltage that high.

Max for a dd I would do 1.3V ish probably end up around 4.6-7GHz ish

 

[10tacle]

As a long time overclocker since the Celeron 300 days of the late '90s, why do you want to overclock so high? Bragging rights are one thing, but for practicality these days, I just don't find high overclocks worth the extra power consumption and heat output...especially when it comes to gaming since games these days are coded for GPU scaling instead of CPU scaling. The law of diminished returns just hits a wall above a certain GHz (meaning the increased voltage and power and heat output just aren't worth it).

But to answer your question, it depends on how good your chip is. This article gives a good idea of what you should expect:

http://www.extremetech.com/computing/185512-overclocking-intels-core-i7-4970k-can-devils-canyon-fix-haswells-low-clock-speeds

 

[synphul]

Every chip is different and you won't know until you try. If you've been getting 200mhz for every .05v increase in vcore that could suddenly change once the cpu hits its wall. Maybe 4.6 @ 1.2v but instead of 1.25v for 4.7 it might take 1.28v (almost 1.3v), or it may not. Each chip has its own limits and tinkering along with stress testing for stability is about the only way to tell. For 24/7 use I wouldn't be comfortable going over 1.3v but to each their own. Some people run 1.35v, 1.4v is considered the upper limit of generally 'safe' but not for 24/7 use.

The best advice is fine tuning it on your own since no one has access to your specific chip. Up the multiplier one at a time, reboot, test for stability. If it crashes, reboot and raise the vcore a little from say 1.2 to 1.24v. If it's stable try reducing vcore to 1.23v and see if stability remains. It's a balancing act and looking at others results are really just a bit of a generalized outline rather than useful for dialing in your overclock.