What Vcore are you using? Don't say auto at 5Ghz. Too low Vcore = BSOD. Too much excessive Vcore = chip fried
If going above 4.2Ghz, better use manual or offset Vcore. Not all processors can exceed 4.8Ghz stable at any Vcore setting.

Do it slow, read up tutorials on overclocking Sandy Bridge/ Your board.

Make sure you do sufficient stress test too. Prime95 - blend tests for example. From my testing, sometimes BSOD comes within minutes, sometimes within 1 hr. sometimes calculation error, but no bsod


The tutorial i read up uses approx
4.5GHz @ 1.24v ~ 1.27v
4.7Ghz - 4.9GHz @ 1.35v

So, 5Ghz should need 1.4v+

Not sure about that. But ASUS AI Tuner settings are temporary. The only way was to change settings in BIOS.
Software = test different voltages quick without rebooting. BIOS = changed settings here stays
Might be same for ASRock.

Go do a google search on how to overclock on your board.

Your processor.
Idle freq = 1.6Ghz
Turbo = You set Ghz

OC = lower stability, so to test for stability, have to stress it using programs like Prime95. Need to monitor temps, vcore, and whether the frequency can be maintained that high under stress.
Overclock to 5Ghz then browsing internet = no bsod = does not mean STABLE, need to see how it handles when under stress (eg prime95)


Overclocking is NOT overclock to 5Ghz, no BSOD. Done.
Overclocking is change settings, stress test, monitor temperatures/voltage.

It is usually not necessary to overclock too much. You risk reducing the lifespan of your processor, high heat + high electricity usage, instability.

SUMMARY:
Google how to overclock on your board + testing for stability
Google Prime95
Monitor temps using programs like HWMonitor + CPU-Z (for Frequency + Vcore reading)

Do it slowly, don't go 4.5Ghz -> 5Ghz straight away. Step by step 4.5 - 4.6 - 4.7...

This post has been edited by adbacc: Apr 8 2012, 10:15 PM

Stable with how many hours of stress and max temp?

Stable means no BSOD, auto restart, errors when put under at least 1 hr of stress test... go get prime95, do blend tests. Be aware of your temperatures.

This post has been edited by adbacc: Apr 9 2012, 01:06 AM

Normal la, under stress will be hot. What cooler are you using? OC must make sure stable under stress and temperatures stay within 70c/80c (up to you to decide the upper limit)

To check max temperature and to see if stable when OCed. Length of test is up to you. I would say 30-60 or 90 minutes.
OC may be stable under light load, but when full load, it might become unstable. Prime95 tests the full load part.

Yes, and it can be quite a big amount when you exceed ~4.3Ghz

This thread was about OCing. At least you know the temperatures of Non OC then can compare to with when OCed

You sure 3.4Ghz 70c using H80? I get ~66c using TX3 2600k @ 4.3Ghz.

This post has been edited by adbacc: Apr 9 2012, 01:43 AM

Ambient temperature was 28c got ~66c prime95. Ambient 31c got ~71c prime95.
TX3 standard single fan full speed. Thermalfusion400 thermal paste

Ambient temperature was room temperature. Readings taken using thermometer in room.

The most important part is front intake, top exhaust. Fans on H80 best to be installed blowing out immediately and not blown into the case.

This post has been edited by adbacc: Apr 9 2012, 08:16 PM

What were you expecting with idle temps? Blame ambient temperature + OC
Under normal conditions, OCing will also lead to higher idle voltages, which in turn lead to higher idle temperatures.

Even so, 40c isn't a dangerous temperature.

Maybe your ambient temperature is 2c higher, so normal for your temperature to be 2c higher. Also, you may have stuff running in the background, using small amount of cpu (1-5%) which can also contribute to a little bit higher temperature.

What does not function? RPM reading? Your fans are connected to mobo or power supply?

Don't worry so much on your idle temperature. As long as it isn't 50-70 for idle, it should be fine.

CPU-Z. Memory tab will show ~800 for DRAM Frequency = 1600Mhz

What ram are you using? If it has XMP 1600, go bios and load the XMP profile (not really sure how to do - check manual or do internet search)