4790k voltage issues

[ApexMaster]

hello, I am having a hard time OC my 4790k more then 4.7 stable here are pix for all my info,  i have tried to disable XMP and run 48x at 1.270v and i get a automatic reboot. go in bios and reset. Intel says for 100 hertz to increase voltage by .040v-.050v so i went from 1.247 to 1.280v and nothing. then i tried with XMP on profile 1, and same thing. running PSU Antec 1000w, H80i V2 cooler,

TESTRESULTS.TXT

[auraofjason]

The voltage increase required per +100mhz increases exponentially as you oc higher. I would guess you'll need around 1.35v for 4.8ghz to be stable.

[W-L]

3 minutes ago, ApexMaster said:

hello, I am having a hard time OC my 4790k more then 4.7 stable here are pix for all my info,  i have tried to disable XMP and run 48x at 1.270v and i get a automatic reboot. go in bios and reset. Intel says for 100 hertz to increase voltage by .040v-.050v so i went from 1.247 to 1.280v and nothing. then i tried with XMP on profile 1, and same thing. running PSU Antec 1000w, H80i V2 cooler,

TESTRESULTS.TXT

Change only one thing at a time when overclocking to eliminate variables, I would push the voltage up all the way to 1.325V or 1.35V as long as them temps are permitting. It sounds like your just limited by voltage needed currently.

[ApexMaster]

so i thought i was getting stale at 4.7 @ 1.247v but as soon as I run the Intel Extreme tuning Utility and run benchmark i got BSOD. now i up voltage to 1.3v for x47 mult, and walla stable benchmark. here are temp for stable 4.7. to to 4.8 should I up to 1.350v?

[wildgg]

1 hour ago, ApexMaster said:

so i thought i was getting stale at 4.7 @ 1.247v but as soon as I run the Intel Extreme tuning Utility and run benchmark i got BSOD. now i up voltage to 1.3v for x47 mult, and walla stable benchmark. here are temp for stable 4.7. to to 4.8 should I up to 1.350v?

it's hard to give a clear answer for you here, because not all chips are the same. my 4790k can do 4.7ghz on 1.310V but for 4.8ghz i need 1.365V so you just need to test test and test more, overclocking process is not done in 5min sometimes it can take days/weeks to fine tune.

 

when i tests cpu overclocks first thing i do when booting into windows is i run CineBench R15, if that passes i run RealBench for 2hours, then i run OCCT for 6hours on large data set.

and of course you want to have some temp software open like realtemp.

 

i always run those 3 tests and so far not one cpu had crashed on me in games.

[ApexMaster]

so with a OC of 4.6 on cinabench i got 955. but with the 4.7 i got 923? i also run realbench, and pass as well. lately i been using the intel extreme tuning

[DrMikeNZ]

7 minutes ago, ApexMaster said:

so with a OC of 4.6 on cinabench i got 955. but with the 4.7 i got 923?

If you are using Cinebench to assess performance at different clocks, wait several minutes after the system has powered on to ensure startup apps are not going to interfere with the results, then run it multiple times and take the average score. Outliers ±100 with repeated runs at the same clock is not unheard of.

 

I would recommend running your intended program as your performance test though to make sure you are actually benefiting from the overclock. Increasing clock speed can lead to diminishing returns with performance per clock and past a point overclocking may only increase power draw.

[ApexMaster]

ok will do. thank you

[W-L]

8 hours ago, ApexMaster said:

so i thought i was getting stale at 4.7 @ 1.247v but as soon as I run the Intel Extreme tuning Utility and run benchmark i got BSOD. now i up voltage to 1.3v for x47 mult, and walla stable benchmark. here are temp for stable 4.7. to to 4.8 should I up to 1.350v?

As long as temps are permitting go for it and see how far it can go, just keep an eye so temps are below 85C.

[MrJarhead]

you wont get 4.7 at 1.247v on a 4790k. it takes 1.3v for me to get 4.8ghz.

[ApexMaster]

so i got stable at 1.30v stable runing all day so far, playing all my games and various benchmarks. never reached above 61deg c max on 100% load.

intel says not to go abouve 1.3v on the 4th gen chip

-> Core i

7th Generation 14 nanometer ... 1.400 Vcore
6th Generation 14 nanometer ... 1.400 Vcore
5th Generation 14 nanometer ... 1.400 Vcore
4th Generation 22 nanometer ... 1.300 Vcore
3rd Generation 22 nanometer ... 1.300 Vcore
2nd Generation 32 nanometer ... 1.350 Vcore
Previous (1st) Generation 45 nanometer ... 1.400 Vcore

[wildgg]

15 hours ago, MrJarhead said:

you wont get 4.7 at 1.247v on a 4790k. it takes 1.3v for me to get 4.8ghz.

of course you can get a 4790k to 4.7ghz with a 1.247V it's all about winning the silicon lottery, if your chip needs 1.3V for 4.8ghz doesn't mean it's the same for everyone else.

 

[MrJarhead]

19 minutes ago, wildthing said:

of course you can get a 4790k to 4.7ghz with a 1.247V it's all about winning the silicon lottery, if your chip needs 1.3V for 4.8ghz doesn't mean it's the same for everyone else.

 

It was very hard to win the silicone lottery with the 4790k, a lot of reviewers couldn't get a good overclock on them.

 

ive pushed mine all the way to 5ghz before.

[Deli]

54 minutes ago, MrJarhead said:

It was very hard to win the silicone lottery with the 4790k, a lot of reviewers couldn't get a good overclock on them.

 

ive pushed mine all the way to 5ghz before.

I remember Linus got 4.8GHz with 1.30V. Lots of 4790K can do 4.8GHz with 1.3v or less. It isn't 4770K, my friend.

[JoostinOnline]

45 minutes ago, Deli said:

I remember Linus got 4.8GHz with 1.30V. Lots of 4790K can do 4.8GHz with 1.3v or less. It isn't 4770K, my friend.

I couldn't get past 4.6GHz with 1.3V on mine.

[MrJarhead]

58 minutes ago, Deli said:

I remember Linus got 4.8GHz with 1.30V. Lots of 4790K can do 4.8GHz with 1.3v or less. It isn't 4770K, my friend.

jayztwocents couldnt even use a 48x multiplier, he had to adjust the baseclock to 1.25 and use a 47x multiplier and that was at 1.34v.

[ApolloX75]

I hit 5.0GHz with my 4790k at about 1.37v but backed it off due to heat. Need bigger rads. My current 24/7 OC is 4.7 at 1.245v. Every chip is different as others have stated.

 

Something to try once you're stable and finished testing/benching is to bring your Uncore clock multiplier up to the same level as your core. I found on my 4670k it had no real effect but on the 4790k it made a decent difference when matched in speed, especially for Cinebench. Keep in mind you may not get it 1:1 and be stable, some just can't do it.

 

Or just sit back and enjoy what you have. Remember to record all your settings in case you have to start from the beginning again. That's happened to me a few times.