CPU TEMPS WAY TOO HIGH (4790k w/ H100i)

I'm wondering but does Corsair Link successfuly detect the H100i and the fans? Mine didn't and so the fans did not ramp up when the CPU heat up. It stayed at it's stayed at a quiet RPM. If Corsair Link works and you can change the RPM of the fans then I wonder if there are any bubbles in the hose or maybe the pump isn't working properly.

That's odd. The H100i was working with your previous CPU (9370) which is a hot processor. If the cooler is 100% secured well with good contact and you did not use too much thermal paste it could be either that the cooler somehow broke while changing CPUs (sounds unlikely), the sensors for the CPU is bad, or something else on the CPU is bad that is causing high temps. Have you tried stressing the CPU with a different program?

I see. I don't own a 4790K so I don't know what the ideal temps or normal temps are. I don't think running a CPU at 90C a few short times during stress test will damage the CPU right away. Hopefully someone who has experience with the 4790K will leave their opinion.

UnionPacific,

Do not use Prime95 version 28.5. Use only 26.6. Run Small FFT's for 10 minutes.

Also, do not use the FPU test in AIDA64.

You might want to read this Tom's Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

" ... Section 10 - Measurement Tools

In order to properly test and evaluate your temperatures, you'll need:

-> A trusted analog, digital or IR thermometer to measure Ambient temperature.

-> The following freeware utilities downloaded and installed -

CPU-Z - http://www.cpuid.com/softwares/cpu-z.html
Hardware Monitor - http://www.cpuid.com/softwares/hwmonitor.html
Prime95 v26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html
Real Temp - http://www.techpowerup.com/downloads/2089/real-temp-3-70/

-> Optional; install if you’d like to use the “Charts” to see your thermal signatures -

SpeedFan - http://www.almico.com/sfdownload.php


Section 11 - Thermal Testing Basics

We all remember science class where one of the guiding principles for conducting a controlled experiment, is that it's critical to follow the same procedure every time. This eliminates variables so results will be consistent and repeatable.

Since everyone tests their rigs using X stress software at Y Ambient temperatures with Z measuring utilities resulting in CPU or Package or Core temperatures, it's impossible to compare apples to apples. This is why processor temperatures are so confusing.

Only three temperatures are relevant; Ambient, steady-state 100% workload, and dead idle. Applications and games are partial workloads with fluctuating temperatures, which are unsuitable for thermal testing or accurate temperature comparisons.

Sections 12 and 13 will explain how to properly test your rig at load and idle using standardized methods. Follow the "Setup" in both Sections to duplicate Intel's lab test conditions. Each 10 minute thermal test will produce a valid benchmark.

Note: Keep in mind that we're thermal testing only. Stability testing is not within the scope of this Guide, which assumes your rig is stable. If you're overclocking, then a combination of utilities, apps or games must be run to test stability.


Section 12 - Thermal Testing @ 100% Workload

Prime95 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload. This is the test that Real Temp uses to test sensors. The link above is to version 26.6, which is well suited to all Core 2 and Core i variants.

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95 run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the software utility AIDA64 shows the same results.

It's not necessary to run AVX code for thermal testing. Prime95 v26.6 produces temperatures on 3rd and 4th Generation processors more consistent with 2nd Generation, which also have AVX instructions, but do not suffer from thermal extremes due to having a soldered Integrated Heat Spreader and a 35% larger Die.

Prime95's default test, Blend, is a cyclic workload for testing memory stability, and Large FFT's combines CPU and memory tests. As such, Blend and Large FFT's both have cyclic workloads which are unsuitable for CPU thermal testing.

Other stability tests such as Linpack and Intel Burn Test have cycles that load all registers with all one's, which is equivalent to a 110% workload, and are also unsuitable for CPU thermal testing. The software utility OCCT runs elements of Linpack and Prime95.

Shown above from left to right: Small FFT's, Blend, Linpack and Intel Burn Test.

Note the steady-state thermal signatures of Small FFT's, which allows accurate measurements of Core temperatures.

Shown above from left to right: Small FFT's, Intel Extreme Tuning Utility CPU Test, and AIDA64 CPU Test.

The "Charts" in SpeedFan span 13 minutes, and show how each test creates different thermal signatures. Intel Extreme Tuning Utility is also a cyclic workload. Although AIDA64's CPU test is steady-state, the workload is insufficient, ... ".

CT

DAMN, lots of useful info. Happy Reading UnionPacific!