First time overclocking - stress testing question

[nvsravank]

I bought a 3770k and OCed it to a modest 4.2 using 103.1*41 setting that the asus p08z77-v board did automatically using bios auto find utility.
I am happy with that modest oc but want to make sure it is stable and temps are in control.

I also OCed my memory to 2166. I have been running memory tests overnight for a few days and seems to be fine.

I started doing CPU and temp tests now with real temp and asus supplied monitoring software. I am using prime 95 large fft test as mentioned in the sticky.

I am getting a core temp on the real temp as 76,81,80,77 after 20 min run. The CPU temp shown in asus is 59c. Why the difference? Which should I use?

I am using scythe mugen 3 rev b as the cooler. Is this temperature good for that cooler?
I tried changing the speed of the fan and changing from 700rpm using the silent setting in fan expert or setting full speed of 1600 rpm does not seem to change the temp. Is that normal because it is a modest oc or because that is the best I can get from the scythe?

Should I run this overnight or should I sit in front of it while running it? If I should sit what should I monitor and what are the signs to look for to stop the processes?

What is distance to tj max mean? Should I worry about that number? Seems like temp + distance to tj max is a constant 105.

What windows setting should I use to run this? Currently I am using performance setting for power setting in windows 7 to test. Hope those are the right settings.

 

[borisvodofsky]

Distance to TJ max, is the TJ max (max temperature according to INTEL) minus the current temperature.

 

[borisvodofsky]

Since you have an ivy bridge, if you're going for the sweet 4.8+ ghz, I suggest you consider Delidding.

DO NOT use auto-overclock, because more often then not, it pumps a significantly more voltage into the core than you really need. This is especially dangerous on Ivy bridge because the Chip runs insanely hot to begin with.

DO NOT Lap the heatsink or CPU, that technique is useless when you don't have pro equipment to control flatness.

 

[Idontcare]

I am getting a core temp on the real temp as 76,81,80,77 after 20 min run. The CPU temp shown in asus is 59c. Why the difference? Which should I use?

According to ASUS both coretemp and realtemp are horribly out-of-date when it comes to IB. They say you should rely on their own program (ASUS) or use AIDA64 Extreme 1938beta.

UPDATE: We have a bit of an update to this post. While breaking in a new i7-3770k system, we noticed that both Real Temp and Core Temp were giving us temperature values on our test system that were just flat out wrong. So, we reached out to ASUS and this is what the company had to say:

CoreTemp is in serious need of updating at this point for full compatibility with Ivy Bridge as is RealTemp (both latest releases do not include E1 stepping compatibility). Our TurboV is very good at monitoring the correct temps and voltages, but if you need third party verification we highly suggest the latest version of Aida64 Extreme (1938 beta or later) as they fully support Ivy Bridge and all current Z77 boards (not just from us). Besides working with the manufacturers, they also work directly with Intel to ensure proper readings and the stability test is actually quite good also.
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link

 

[2is]

That's very interesting info. Downloading Aida now

 

[2is]

Eh... Same temps reported with AIDA

 

[nvsravank]

Same here. Aida reports same temp as real temp and asus. They just gave different labels to the temp!

Voltage is 1.2V. I am thinking that is safe for long term use.

 

[unclewebb]

CoreTemp is in serious need of updating at this point for full compatibility with Ivy Bridge as is RealTemp (both latest releases do not include E1 stepping compatibility).

The person at Asus that said this obviously doesn't know what he is talking about. Reading core temperatures from any Core i CPU has not changed since the first Core i processor was released in November 2008. Monitoring software uses the exact same method to read core temperatures for all Core i processors including the new Ivy Bridge CPUs. When it comes to core temperatures, E1 stepping compatibility is pure nonsense.

The reason the Turbo V software shows much lower CPU temperatures than RealTemp or Core Temp or AIDA is because it is reading and reporting data from a totally different temperature sensor. That sensor does not report the peak core temperature and for overclockers that CPU temperature information is useless. The only important CPU temperature is the core temperature because that data is what ALL Intel CPUs use to control both thermal throttling and thermal shutdown.

Hopefully the brain surgeon at Asus that is trying to cover up the fact that the CPU temperature their Turbo V software reports is useless can stop by and explain this.

RealTemp 3.70
http://www.techpowerup.com/downloads/2089/Real_Temp_3.70.html

 

[borisvodofsky]

LOL, like we didn't know this all along? :whiste:

I mean this is why I put my Phase Duty Control under Extreme mode, because I don't trust no damn temperature probes that Asus put on the motherboard. :awe:

 

[Idontcare]

The person at Asus that said this obviously doesn't know what he is talking about. Reading core temperatures from any Core i CPU has not changed since the first Core i processor was released in November 2008. Monitoring software uses the exact same method to read core temperatures for all Core i processors including the new Ivy Bridge CPUs. When it comes to core temperatures, E1 stepping compatibility is pure nonsense.

The reason the Turbo V software shows much lower CPU temperatures than RealTemp or Core Temp or AIDA is because it is reading and reporting data from a totally different temperature sensor. That sensor does not report the peak core temperature and for overclockers that CPU temperature information is useless. The only important CPU temperature is the core temperature because that data is what ALL Intel CPUs use to control both thermal throttling and thermal shutdown.

Hopefully the brain surgeon at Asus that is trying to cover up the fact that the CPU temperature their Turbo V software reports is useless can stop by and explain this.

RealTemp 3.70
http://www.techpowerup.com/downloads/2089/Real_Temp_3.70.html

Good to know, and welcome to the forums unclewebb :thumbsup: You are legend

 

[PowerK]

Good to know, and welcome to the forums unclewebb :thumbsup: You are legend

Indeed! Love RealTemp!