4790k with Noctua d15 temps

[BiggerBluer]

So I built my computer about 2 weeks ago and I decided to go with the d15 for the best air cooling. My pc runs great typically never goes above 55c when playing games (30c at idle). However I wanted to push my cpu to the limit (100%). So I decided to run prime 95 v26.6 (yes I know that prime has different versions for different generations). Once I start the test my temps instantly go up to 75c and stay around that temp for the duration of the test. Maybe I'm crazy but a part of me feels like the d15 should never allow my cpu to go above 70c. Has anyone had this issue with cpu temps? I reapplied the thermal paste and made sure to only use a small pea size so not sure what the issue might be. Thanks for your help!

 

[James62389]

Those temps are fine. I wouldn't use prime 95 on a regular basis but you are good to go. If you ever get into overclocking give Aida 64 a shot for testing temps. I love it.

 

[geofelt]

Your temperatures are nominal.
Prime95 stresses the cpu with a limited subset of instructions.
OCCT will more closely emulate what you will actually use.

It is not temperature that will limit your overclock.
It is the level of vcore that you are willing to tolerate.
Once you go past 1.30v, you are not really good for 24/7 operation.

Do not worry much about overheating.
The cpu will slow down or shut off if it reaches a dangerous temperature. That is about 100c.

 

[BiggerBluer]

At what clocks?

According to HWMonitor it is 4390Mhz

 

[BiggerBluer]

Your temperatures are nominal.
Prime95 stresses the cpu with a limited subset of instructions.
OCCT will more closely emulate what you will actually use.

It is not temperature that will limit your overclock.
It is the level of vcore that you are willing to tolerate.
Once you go past 1.30v, you are not really good for 24/7 operation.

Do not worry much about overheating.
The cpu will slow down or shut off if it reaches a dangerous temperature. That is about 100c.

My cpu is currently at 1.3v now. I do not have it oc so should I turn that down?

 

[Adam Persaud]

I cant speak for prime but when I use aida 64 with 4790k and nh-d15 I get around 64ish degrees with spikes in the 70s but sounds like a reasonable temp with the noctua.

 

[BiggerBluer]

'Mid 70's' is considered safe on haswell for loaded use, incursions into the mid 80's are considered usual for stress testing if you have reached the sensible limit of overclocking.
http://www.tomshardware.co.uk/forum/id-1800828/intel-te...
The processor will as usual outlast motherboard manufacture at 70C, 24 hours a day.
4.4 is not a record,but your temp of 55c shows you should hit 4.7 or 4.8 which is usual.
(if it bothers you any).

Thanks for the help!

 

[BiggerBluer]

I cant speak for prime but when I use aida 64 with 4790k and nh-d15 I get around 64ish degrees with spikes in the 70s but sounds like a reasonable temp with the noctua.

Alright I'll give that program a try! I just heard that prime was the best for really pushing your cpu to the max. btw how hard was it for you to put your fans on your heat sink for your d15? Mine was a huge pain because of how massive it was. I have one of my fans bottom literally touching my ram sticks because the heatsink is so big lol.

 

[geofelt]

The 4790K will, by default run at 4.4(turbo)
For most, you need do little more.
As a matter of interest, I just ran OCCT on my 4790K
I have a asus maximus vii gene and a noctua NH-D14 which is very similar to the NH-D15, perhaps a touch weaker.
My temperatures were about 70c. You should expect acouple of cores to run hotter than others, that is normal.
Looking at vcore, OCCT and CPU-Z both indicated vcore as 0.90 with a little fluctuation.
This was a surprise to me, I expected higher. About the only setting that I can recall specially was to implement adaptive voltage control.
That reduces vcore when not under load. At idle, it seems that I am still near 0.90v.
I don't think I have an especially good chip.
Early on, when I was experimenting with overclocking, I recall vcore running higher.
Since then, I have updated my motherboard bios which may have improved the voltage control in some manner.

Bottom line, I think 1.30 vcore is high for what you are doing.
Investigation would be advisable.

My

 

[BiggerBluer]

The 4790K will, by default run at 4.4(turbo)
For most, you need do little more.
As a matter of interest, I just ran OCCT on my 4790K
I have a asus maximus vii gene and a noctua NH-D14 which is very similar to the NH-D15, perhaps a touch weaker.
My temperatures were about 70c. You should expect acouple of cores to run hotter than others, that is normal.
Looking at vcore, OCCT and CPU-Z both indicated vcore as 0.90 with a little fluctuation.
This was a surprise to me, I expected higher. About the only setting that I can recall specially was to implement adaptive voltage control.
That reduces vcore when not under load. At idle, it seems that I am still near 0.90v.
I don't think I have an especially good chip.
Early on, when I was experimenting with overclocking, I recall vcore running higher.
Since then, I have updated my motherboard bios which may have improved the voltage control in some manner.

Bottom line, I think 1.30 vcore is high for what you are doing.
Investigation would be advisable.

My

Ok I will do that! I am kinda worried that I might fry my cpu or motherboard if I mess with the settings. What is the worst thing that could happen if I say lowered it to 1.28 or something? Is their any chance of the hardware being damage?

 

[geofelt]

My suggestion is to reset all the options to default and go from there.
In the past, motherboard automatic tuning options such as "fast/faster/max" have been too aggressive.

Extra low voltages might cause instability, but not damage.
It is high voltages that can do harm.

 

[BiggerBluer]

My suggestion is to reset all the options to default and go from there.
In the past, motherboard automatic tuning options such as "fast/faster/max" have been too aggressive.

Extra low voltages might cause instability, but not damage.
It is high voltages that can do harm.

Ok that's good news! I just lowered my volts down to 1.29 and saw a 5c temp drop while running prime 95! My last question is what is the lowest volts you would go on a stock speed 4790k non oc? Thank you very much for your help

 

[geofelt]

Prime 95 is not a good stress test, it uses a subset of instructions not like what we do every day.
Use OCCT as a better testing program.

The usual thing to do is to run with vcore at 1.29 or such and then see how high you can set the multiplier with stability.
That is not what you are asking for.

I like to have the vcore lowered when it is not needed. Look into implementing speedstep or C1e(sometimes by other names)
Run cpu-Z and you should see the multiplier lower and the vcore lower when the cpu has little to do.

 

[Adam Persaud]

I cant speak for prime but when I use aida 64 with 4790k and nh-d15 I get around 64ish degrees with spikes in the 70s but sounds like a reasonable temp with the noctua.

Alright I'll give that program a try! I just heard that prime was the best for really pushing your cpu to the max. btw how hard was it for you to put your fans on your heat sink for your d15? Mine was a huge pain because of how massive it was. I have one of my fans bottom literally touching my ram sticks because the heatsink is so big lol.

I have one fan touching the ram too but most set ups with the noctua look like that. and the fans weren't all that hard for me to be honest but ive worked with this type of clip before

 

[BiggerBluer]

I cant speak for prime but when I use aida 64 with 4790k and nh-d15 I get around 64ish degrees with spikes in the 70s but sounds like a reasonable temp with the noctua.

Alright I'll give that program a try! I just heard that prime was the best for really pushing your cpu to the max. btw how hard was it for you to put your fans on your heat sink for your d15? Mine was a huge pain because of how massive it was. I have one of my fans bottom literally touching my ram sticks because the heatsink is so big lol.

I have one fan touching the ram too but most set ups with the noctua look like that. and the fans weren't all that hard for me to be honest but ive worked with this type of clip before

This might be a dumb question but can you purchase the clips from amazon or something? I was thinking about putting a 3rd fan on (just to make it look like a beast 😀).

 

[BiggerBluer]

Prime 95 is not a good stress test, it uses a subset of instructions not like what we do every day.
Use OCCT as a better testing program.

The usual thing to do is to run with vcore at 1.29 or such and then see how high you can set the multiplier with stability.
That is not what you are asking for.

I like to have the vcore lowered when it is not needed. Look into implementing speedstep or C1e(sometimes by other names)
Run cpu-Z and you should see the multiplier lower and the vcore lower when the cpu has little to do.

Thank you for your help man! I lowered my core v down to 1.2 and now I don't get above 65c! I also did some research and found out that the 4790k can sometimes run at 1.3v by default. This is weird because most people can achieve a easy 4.6 oc on 1.3v let alone the stock 4.4.

 

[geofelt]

Contact Noctua customer support.
They will likely mail you one for free. Particularly of you buy one more of their fans which are excellent.

 

[Adam Persaud]

geofelt said it best. noctua has some of the best support for their products. but I really don't think a third fan will do all that much considering the minimal difference between 1 and 2 fans, I think it would just bog down your motherboard way too top heavy than any performance value

 

[BiggerBluer]

geofelt said it best. noctua has some of the best support for their products. but I really don't think a third fan will do all that much considering the minimal difference between 1 and 2 fans, I think it would just bog down your motherboard way too top heavy than any performance value

true.. I just wanted the look of a huge heat sink with 3 fans lol. I'll probably just stay with 2

 

[Adam Persaud]

geofelt said it best. noctua has some of the best support for their products. but I really don't think a third fan will do all that much considering the minimal difference between 1 and 2 fans, I think it would just bog down your motherboard way too top heavy than any performance value

true.. I just wanted the look of a huge heat sink with 3 fans lol. I'll probably just stay with 2

I have been debating on just using the center fan on it see how much of a change in temp I get