Something wrong with haswell cpus? High temps.....

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[kaoru.]

Here 8 and 4 threads yields the same endresult, throttling, 8 threads will get there under 10 seconds, 4 takes a little longer :

Throttling will take it down around 1.5 to 2.5GHz

Running 1 thread i can push it to 100 degress too with turbo, it will back down a little to 3.5-3.8 and run in that area.

Running 2 threads and we are back in throttle terretory pretty fast again, now ranging 2.4-2.8GHz

Running 3 threads+ would be redundant

reproduction
- should get version 28 for avx2 punishment - http://mersenne.org/download/
- run tourture test (small FFTs, max heat)

So, how do your haswell temps stack up ?

Wow those are high temps as well. Are haswell temps usually like this????
I believe mine was turbo enabled as well.

My i5-2500 maxed around 66c with turbo running for encoding
100% cpu usage. Yet haswell is around 95-100cs,
doesnt make sense to me, since haswell are lower TDP,
you would expect lower temps .

I do remember 1 review with temps at stock 65c, which I thought was odd.
Also once he started over clocking, it started to climb 80s-90s.

 

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[ShintaiDK]

Wow those are high temps as well. Are haswell temps usually like this????
I believe mine was turbo enabled as well.

My i5-2500 maxed around 66c with turbo running for encoding
100% cpu usage. Yet haswell is around 95-100cs,
doesnt make sense to me, since haswell are lower TDP,
you would expect lower temps .

I do remember 1 review with temps at stock 65c, which I thought was odd.
Also once he started over clocking, it started to climb 80s-90s.

The chip is smaller, the cores are much smaller. So Haswell can run hotter, while using less power. Remember the sensors are at the cores. Not to mention Haswell is around twice as fast in Prime95, linpack etc as your Sandy Bridge.

If you hit 100C while encoding a movie, something else is wrong.

What is your CPU fanspeed when it reaches 100C?

 

[Majic 7]

Managed to make my system hit 100 immediately when running Prime by choosing gaming in the EZ Tune section of the Bios. It raised multiplier from 100 to 102 and raised the voltage, but I am not sure by how much. Basically 8% overclock. Returned everything to stock and it is back to running 65 to 75 running Prime. I really need to study up on this system before I mess with anything again. From some of the results people are getting I think all the different Bios' need work.

 

[kaoru.]

Hi ShintaiDK, im not sure how voltages work, I did notice mine somewhat higher
at idle for some reason.

I did 1 prime and 1 idle.
http://imgur.com/VypTEVj,gyovGrH#0

idle 2
http://imgur.com/VypTEVj,gyovGrH#1

 

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[cytg111]

I tried fixing VCORE to 1.1 and disabled turbo all together, fan at 2000rpms.. I still hit 100 on 8 threads of prime .. a quick test though, got more testing to do, hopefully ill be able to post back with more results later today.

 

[ShintaiDK]

Hi ShintaiDK, im not sure how voltages work, I did notice mine somewhat higher
at idle for some reason.

I did 1 prime and 1 idle.
http://imgur.com/VypTEVj,gyovGrH#0

idle 2
http://imgur.com/VypTEVj,gyovGrH#1

I would first like to know why your minimum fanspeed 0 RPM? Why has your fan been stopped?

 

[ShintaiDK]

I tried fixing VCORE to 1.1 and disabled turbo all together, fan at 2000rpms.. I still hit 100 on 8 threads of prime .. a quick test though, got more testing to do, hopefully ill be able to post back with more results later today.

2000rpm on the stock cooler is close to idle mode.

 

[cytg111]

Well, found some of my problems, apparantly I had an beep old bios (board 9 months old, yeh), that didnt officially support haswell.
Anyway here is me throttling with 8 threads and NO MCT, but it takes a longer time to get there

With MCT, prime95 :
no throttling with 1 thread , stays at 3.9GHz, temps 60-70ish, but 2 threads is pushing it, 3 threads throttles to about 3.5... more threads and it gets worse.

So it's better but still not good.

 

[ShintaiDK]

You use the stock fan? I see 2000rpm. It should be close to 3000rpm.

 

[Techhog]

Well, found some of my problems, apparantly I had an beep old bios (board 9 months old, yeh), that didnt officially support haswell.
Anyway here is me throttling with 8 threads and NO MCT, but it takes a longer time to get there

That's impossible lol. It ONLY supports Haswell.

 

[cytg111]

You use the stock fan? I see 2000rpm. It should be close to 3000rpm.

- Yes stock cooler, fan, everything, dont get more than 2000. But maybe the fan is the culprit.. HWMonitor also reports 0 rpms some times, even under heavy load, same does speedfan, asrocks a-tuning util does not however. I noticed that kaoru also had a min of 0 rpm on his hwmonitor screenshot.

That's impossible lol. It ONLY supports Haswell.

I know right?
http://www.asrock.com/mb/Intel/Z87 Extreme6/?cat=Download&os=BIOS
from version 2.20 support for 4th gen .. I had version 1.2 .. apparantly some uber beta pos cause the first (cant see that on that page), like 5, versions was "improve bios stability".. grrr hate being the unknowing participant in a betatest. But the adaptive vcore is working now (fluctuating)..when I am looking at it its pretty evident that it was not before!

 

[Galatian]

I'm at 4,6 GHz with my i7-4790K with 1.25 V Core and I "only" hit 85 degrees Celsius under Prime95. at 4,8 Ghz and 1.325 V I hit 95 degrees...so I settled on my sweetspot of 4,6

 

[cytg111]

Your cooling solution is ?

 

[Galatian]

Your cooling solution is ?

Water, but that doesn't matter much for Ivy and Haswell since the IHS and the thermal paste used by Intel is the limiting factor. I can cool my GPU down to 38 degrees Celsius under load for example, but that it direct die cooling.

 

[cytg111]

Ok .. another Q, how long do you run prime for? (and it IS the avx2 version right?) .. thing is it makes another temp jump after about 10 minutes or so..

 

[Galatian]

Ok .. another Q, how long do you run prime for? (and it IS the avx2 version right?) .. thing is it makes another temp jump after about 10 minutes or so..

24 Stress test...newest version with FMA and AVX.