Overheating issue 4790k/rendering

[Tvossman26]

I have a overheating issue with the 4790k..
Cpu: 4790k
Cooler: nzxt kraken x61
Case:nxzt h440
Video card: gtx 970
Ram: 2133 mhz 16 gb
Mobo:asus maximus vii hero

Idle temp:32-34 cel.
Rendering in sony vegas:78-80 cel.

It seems very hot.. I have heard doing manuel v-core helps? Idk computer noob here... I am at stock clock but have seen people at 4.5 with same hardware run cooler temps? Any help would be great'

 

[Karadjgne]

What you are asking for is overclocking help. Overclocking being running a cpu at speeds higher than the voltages set.

Best way is with a stress test like prime95 v26.6 and cpu-z. Run the stress test, small fft. Take note on cpu-z of the vcore voltage. Then go into bios, find vcore, take it off auto and set vcore for just above the cpu-z voltage. Run stress again. Watch temps. If stable, back into bios, lower vcore by @0.05v, stress etc. Repeat. Do this until temps are good enough or until stress test causes instability, raise vcore back up 0.05v, repeat.

Do this when you have all day to tinker. Stress testing should be for 1/2 hr. If you hit instability, after raising, stress for 4hrs+.

As you aren't raising speeds, everything else can be left as is on auto.

 

[Tvossman26]

Im at stock clock now tho.. And still running high temps.

 

[Karadjgne]

and by rendering you are using 8 threads (4cores+HT) to almost 100% which is well beyond normal usage. With the x61 you shouldn't have been having any temp issues to begin with, I run my i7 3770k at 4.6GHz 1.216v and p95 v26.6 small fft only sees 72*C on my x61, and that's 100% load on 8 threads. So, either your voltages are way high, your pump got a bad seat / paste probs, or the render uses more AVX instructions than in p95 26.6

What you aren't understanding fully is voltages and clocks are separate entities. Intel deliberately sets stock voltages high, to cover any discrepancy between cpus. My overclocked voltage is much lower than your current stock voltage, even though you are at stock clock and I'm 1.1GHz over stock clock. What this means is my temps under exacting conditions to yours, will be lower at load.

to lower temps, assuming the pump is mounted correctly and the paste is applied correctly, you'll need to lower vcore voltage, probably ending up anywhere around 1.208v-1.232v would be my guess, as right now you could very well be running 1.298v when at full turbo speed across all 4 cores.

You'll need to check with CPU-Z to get more exacting vcore voltage

 

[Tvossman26]

and by rendering you are using 8 threads (4cores+HT) to almost 100% which is well beyond normal usage. With the x61 you shouldn't have been having any temp issues to begin with, I run my i7 3770k at 4.6GHz 1.216v and p95 v26.6 small fft only sees 72*C on my x61, and that's 100% load on 8 threads. So, either your voltages are way high, your pump got a bad seat / paste probs, or the render uses more AVX instructions than in p95 26.6

What you aren't understanding fully is voltages and clocks are separate entities. Intel deliberately sets stock voltages high, to cover any discrepancy between cpus. My overclocked voltage is much lower than your current stock voltage, even though you are at stock clock and I'm 1.1GHz over stock clock. What this means is my temps under exacting conditions to yours, will be lower at load.

to lower temps, assuming the pump is mounted correctly and the paste is applied correctly, you'll need to lower vcore voltage, probably ending up anywhere around 1.208v-1.232v would be my guess, as right now you could very well be running 1.298v when at full turbo speed across all 4 cores.

You'll need to check with CPU-Z to get more exacting vcore voltage

So use cpu-z and fine the voltage? And then set that voltage in my bios? So should i overclock to 4.5 first! and then use cpu-z to find a voltage then set that voltage in the bios? How do i enter the voltage? Theres like 10 slots for voltages lol

 

[Great Success]

Those temps are a bit warm but completely fine for that CPU under load. If those temps are at stock voltages I'd invest in a better cooler before you venture into the world of overclocking.

Also don't use P95 as a stress tester for that CPU as it causes unrealistic temps. I prefer AIDA64 & OCCT.

 

[Tvossman26]

Those temps are a bit warm but completely fine for that CPU under load. If those temps are at stock voltages I'd invest in a better cooler before you venture into the world of overclocking.

Also don't use P95 as a stress tester for that CPU as it causes unrealistic temps. I prefer AIDA64 & OCCT.[/

My cooler is one of the best on the market.. Its a settings issue..

 

[Karadjgne]

Prime95 v26.6 is the best to use for Haswells, its only versions newer than that that shouldn't be used as they give unrealistic temps. The problem with occt and aida64 is their loading isn't consistent, so a test with those the load can vary so temps become unreliable. P95 small fft gives a consistent load.

The kraken x61 is a 280mm rad and is one of the top aios on the market, basically beaten only by the Corsair h110 GTX , and only by a few°C at extreme OC.

If the pump is seated correctly, paste is correct, then there is basically just 2 variables left as to why op is seeing such high temps over mine at lower speeds, either the rendering software is using more avx instructions than is normal, driving up cpu temps, or the stock voltage is way high. I've seen posts of 4790k stock untouched voltages reaching 1.298v when pushed, which certainly is high, much higher than my 1.216v, which would account for op's higher temps under load. Until op uses a render and notes cpu voltage from cpu's, this would be my guess. Lowering vcore isn't hard, just time consuming to do it right and safely, and there is usually plenty of room to maneuver.

 

[Tvossman26]

Prime95 v26.6 is the best to use for Haswells, its only versions newer than that that shouldn't be used as they give unrealistic temps. The problem with occt and aida64 is their loading isn't consistent, so a test with those the load can vary so temps become unreliable. P95 small fft gives a consistent load.

The kraken x61 is a 280mm rad and is one of the top aios on the market, basically beaten only by the Corsair h110 GTX , and only by a few°C at extreme OC.

If the pump is seated correctly, paste is correct, then there is basically just 2 variables left as to why op is seeing such high temps over mine at lower speeds, either the rendering software is using more avx instructions than is normal, driving up cpu temps, or the stock voltage is way high. I've seen posts of 4790k stock untouched voltages reaching 1.298v when pushed, which certainly is high, much higher than my 1.216v, which would account for op's higher temps under load. Until op uses a render and notes cpu voltage from cpu's, this would be my guess. Lowering vcore isn't hard, just time consuming to do it right and safely, and there is usually plenty of room to maneuver. [/


How do i set vcore temps

 

[Karadjgne]

In bios. You'll find a setting for vcore. By default it'll be on auto