intel i7 4790k running hot

Load: 50-65 are VERY good temperatures for a 4790k.. Don't be worried. My 4790k with a small Noctua air cooler gets to 70C in gaming. Max temp in stress tests is about 85.

Jeremy Bordenuik,

Spikes are normal. Core temperatures respond instantly to changes in load.

Also, you can't compare apples to oranges, AMD to Intel, or 32 nanometer architecture to 22 nanometer architecture.

Let's give you some perspective on this topic.

The term "load" gets tossed around like gorilla poo in a cage. Load? Which load? What load? Load is a very subjective term.

Applications, rendering, encoding and gaming are partial workloads with fluctuating temperatures, and aren't suitable for thermal testing or comparing temperatures, but they're great for endless debate.

There are only three relevant values; Ambient, steady-state 100% workload, and dead idle. Prime95 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload.

Intel desktop processors have thermal sensors for each Core, plus a sensor for the entire processor, so a Quad Core has five sensors. Heat originates within the Cores where Digital sensors measure Core temperatures. A single Analog sensor under the Cores measures overall CPU temperature.

Core temperature is 5C higher than CPU temperature due to sensor location. Intel's Thermal Specification is "Tcase", which is CPU temperature, not Core Temperature. Tcase for your i7 4790K is 74C: http://ark.intel.com/products/80807/Intel-Core-i7-4790K-Processor-8M-Cache-up-to-4_40-GHz

Tcase + 5 makes the corresponding Core temperature 79C. <-- This is your spec.

The relationship between Core temperature and CPU temperature is not in the Thermal Specifications; it's only found in a few engineering documents.

The relationships between Ambient temperature, CPU temperatures, Core temperatures and Throttle temperatures are shown below for the i7 4790K. All values are based on Intel documentation.

4th Generation 22 Nanometer: 4790K (TDP 88W / Idle 2W)

Standard Ambient = 22C
Tcase (CPU temp) = 74C
CPU / Core offset + 5C
Tjunction (Core temp) = 79C
Tj Max (Throttle temp) = 100C

Standard Ambient temperature is 22C, which is normal room temperature, and is the reference value for Intel’s Thermal Specifications. Knowing your Ambient temperature is important because Ambient directly affects all computer temperatures.

With conventional air or liquid cooling, no temperatures can be less than or equal to Ambient.

As Ambient temperature increases, thermal headroom and overclocking potential decreases.

At 22C Standard Ambient, here's the typical operating range for Core temperature:

80C Hot (100% Load)
75C Warm
70C Warm (Heavy Load)
60C Norm
50C Norm (Medium Load)
40C Norm
30C Cool (Idle)

Q What is your Ambient temperature?

Please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

Run only Small FFT’s for 10 minutes.

Q What are you using to measure temperatures?

Use only Real Temp to measure your Core temperatures, as it was designed specifically for Intel processors: Real Temp - http://www.techpowerup.com/downloads/2089/real-temp-3-70/

Let us know what Real Temp reports 10 minutes into the Small FFT's test.

Please read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Thanks,

CT

Casper Traberg-Larsen,

Before you can validate temperatures, you first need to know ambient temperature and load software. You also need to know which monitoring software is being used to measure CPU temperature or Core temperature. There's a difference.

You might want to give this a read to get yourself up to speed: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Thanks,

CT

I know, i know..
But for an quick answer to OP, a load temperature (i presume 100%) at 50-65C is good - no matter the ambient. That is all he needs to know i always presumed, that he was reading the correct core temperature.

my cpu i7 4790k and i using intel cpu cooler when i rendering in after effect Temperature reaches
96 Celsius
for a minute and finished render
It's the second time using after Effect, and I think I will not use it until I get cooler