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les overclock da 4790k

Toothless

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I worked 31.5 hours in three days, bare with me.

I'm trying to see if I can bump my CPU to go faster because I know it can and why not. GPU upgrade around the corner and new SSD right behind it. ( I DID A BUDGET THINGY )

So far I have 4.3ghz base with a 4.6 max turbo at 1.249v on the core. I'm thinking I need to bump the voltage up a bit because when I run Linpack, as soon as the chip hits 80c the system freezes, locks, and bluescreen/reboots. I know games and general stressers help best.

Also idle temps are 30-45 and that's because it's hotter than a burnt potato in my room.
 
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Mussels

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maybe you just need better cooling, high temps like that can make a chip unstable.
 
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Idle temps do not matter. You need adequate cooling if you want to overclock. Not more voltage
 

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Get a corsair H80i or H105. Ive used both on my 3930k and the h80i can handle an overclock
 
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Benchmark Scores Faster than yours... I'd bet on it. :)
I would get a dual rad... not an H80i. Although the 3930K is a higher wattage CPU, it was also cooled with solder TIM so cooling it was a bit easier in that regard.

As far as your overclock. Its simple. First, I would disable turbo and run things all at the same speed. But then it is quite simply a voltage game to get stable at whatever clockspeed.

It is curious that you are BSOD when it hits 80C. What was the BSOD code?
 
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4.6 might be your max for ambient-type temps..
That's about the avg.
 
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As everyone suggested, you need better cooling,

Also below is my current setting on i5 4670K, hope these settings helps.

BTW, once the cpu is above 4.6 GHZ it would be wise to keep Processor Input voltage at 1.9v for stability reasons and remember Processor input voltage is not CPU CORE VOLTAGE. Do not mix them up or else your cpu will go in flames.

 
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Benchmark Scores Faster than yours... I'd bet on it. :)
1.25v for 4.6 wow that's high
Is it? Seems about right really...

BTW, once the cpu is above 4.6 GHZ it would be wise to keep Processor Input voltage at 1.9v for stability reasons and remember Processor input voltage is not CPU CORE VOLTAGE. Do not mix them up or else your cpu will go in flames.
The input voltage needs to be .5v or more above your vcore... that is it. There is no reason to adjust it for ambient cooled overclocks.

 
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Is it? Seems about right really...

The input voltage needs to be .5v or more above your vcore... that is it. There is no reason to adjust it for ambient cooled overclocks.
Processor input voltage starts from 1.8V not 1.1V just an fyi.
 

Toothless

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I hope I didn't just start a debate.

I guess I'll hold off on pushing it any farther until I can balance out wanting to use water cooling like a H100i.

And I thought I had a decent cooler. :roll:
 

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Benchmark Scores Faster than yours... I'd bet on it. :)
Processor input voltage starts from 1.8V not 1.1V just an fyi.
Ok... help me understand the relevance of that statement here please. :)

There is no need to raise CPU input voltage until your vcore is going to be less than .4v away from it. And even then its a grey area, not a distinct cutoff in a lot of cases. You are right in that you do NOT want to flip flop these values though!

I hope I didn't just start a debate.
Just trying to get relevant facts out. Either I misunderstood what he was saying, or he was incorrect. Stock is 1.8v which gives one up to 1.4v before things can get wonky (the sane 24/7 limit anyway) stability wise.


EDIT: SIDE NOTE... .4v away from input voltage, not .5, my fault!!! Edited posts to reflect that.
 
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Toothless

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So, wait, how much voltage should a 4790k need to get to 4.6?
 
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Benchmark Scores Faster than yours... I'd bet on it. :)
Every chip is different. It will vary. I have seen some do 1.2 and some at 1.4v...

But again there is zero reason to adjust it until you get into the 1.4v CPU range IF you need it then.
 
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Ok... help me understand the relevance of that statement here please. :)

There is no need to raise CPU input voltage until your vcore is going to be less than .4v away from it. And even then its a grey area, not a distinct cutoff in a lot of cases. You are right in that you do NOT want to flip flop these values though!

Just trying to get relevant facts out. Either I misunderstood what he was saying, or he was incorrect. Stock is 1.8v which gives one up to 1.4v before things can get wonky (the sane 24/7 limit anyway) stability wise.


EDIT: SIDE NOTE... .4v away from input voltage, not .5, my fault!!! Edited posts to reflect that.

You are correct, theoretically it should work that way, but i have observed if i am pushing the chip above 4.6GHZ no matter what core voltage i throw my system is unstable. Anyway surprisingly if i increase the input voltage from 1.8 V (Default) to 1.9V, the system is stable even at 1.3V @ 4.8GHZ - i have tried this on other system as well - results are same (4.7 GHZ @ 1.325 with Input voltage @ 1.9V), hence the advice.
 
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Benchmark Scores Faster than yours... I'd bet on it. :)
Thanks for clarifying and sharing. I have never had to touch input voltage for stability until I broke the .4v threshold. This is across nearly a dozen Haswell CPUs (4770K/4790K/4690K) and a few boards (MSI/ASRock/Giga).

Perhaps it is because of your Z87 based board versus the Z97 I used?
 

Toothless

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I‘ve got a higher max boost of 4.8Ghz at about 1.1v 。Haha!
Did you seriously make an account just to brag about your chip?
 

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Toothless

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Sorry,it's my first time to be here and by the way i register an account just for discussing hardware issue.I've no intention to boast about my 4790k.

Cool, its time share how you got to 4.8GHZ @ 1.1, share the screen shot like i did so that everyone can learn. :)
 
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I worked 31.5 hours in three days, bare with me.

I'm trying to see if I can bump my CPU to go faster because I know it can and why not. GPU upgrade around the corner and new SSD right behind it. ( I DID A BUDGET THINGY )

So far I have 4.3ghz base with a 4.6 max turbo at 1.249v on the core. I'm thinking I need to bump the voltage up a bit because when I run Linpack, as soon as the chip hits 80c the system freezes, locks, and bluescreen/reboots. I know games and general stressers help best.

Also idle temps are 30-45 and that's because it's hotter than a burnt potato in my room.
well i got somewhat similar HW to you though i have a gaming 7 instead of 5( and a Tt AIO:rolleyes:)... i got mine randomly to 4.6 GHz @1.265v but the motherboard reports it as 1.272v :confused:.... i got turbo disabled,Uncore to 46, K OC on and left everything as it is
i cant take BIOS pics later if you want
 
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