Prime95 or Intel Processor Diagnostic Tool?

[jordan1794]

Hello all!

So after extensive testing with Prime95 (using version 26.6, the one that supposedly doesn't ridiculously over-do the testing on the i7's) I was OK with my temperatures being about 75 degrees. Was hoping for something lower with my Phanteks PH-TC14PE, but I assumed that I'm only air-cooling so only so much can be expected.

Just for giggles, I decided to try out the Intel testing utility, and to my surprise my temperatures never even got high enough for my fans to kick to top speed
(On the Prime95 fans would go to 1500 RPM with the 75 temp, on the intel test my fans only went to 1100 rpm and temps never went above 65 degrees.)

Both tests had my processor at 4.4Ghz, and both at 100% CPU usage.


What test/temperature should I go by? I'd like to OC in the future, but at 75 that doesn't leave much room, meanwhile 65 without maxing fans leaves plenty of room.

 

[Dogsnake]

Did you use Intel Burn? Is that what you are referring to? How are you checking your temps..what utility? What settings did you use for each testing utility? What cpu are you testing?

 

[Baumy15]

just play whatever games you would normally play and do that for a few hours and see what your temps are that's a better way to determine your temps and how much further you can overclock

 

[jordan1794]

Did you use Intel Burn? Is that what you are referring to? How are you checking your temps..what utility? What settings did you use for each testing utility? What cpu are you testing?

Sorry.
I'm using an intel 4790K, and I'm using intels own Processor Diagnostic Tool(Not the Intel Burn)

I'm checking temps using BOTH RealTemp, and HWMonitor (Although the differences between them are never more than 1 degree)

 

[Dogsnake]

OK then to answer you directly, Prime is giving you the highest temps under full load. For O.C. limits I would use it as my test and RealTemp as the measure. If you are just looking at the cpu, run the small files option for a few hours (many will run it overnight as a final check for stability). If you want to involve the memory for a more over all test run the blend.

 

[CompuTronix]

Guys,

Intel's Processor Diagnostic Tool shows lower temperatures than Prime95 because IPDT only runs the processor at 90% TDP, while Prime95 Small FFT's runs the processor at 102% TDP.

Both will show 100% CPU usage, which is not the same as 100% TDP (Thermal Design Power).

Use Core Temp to monitor Power (watts) during testing. The 4790K is an 88 watt TDP processor, so at stock BIOS settings, Prime95 Small FFT's should load your processor to slightly over 90 watts. If you're overclocked, then expect it to scale up accordingly.

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

Thanks,

CT