Amazing Temperature 66C at 4GHz !

[bulldog147]

After 2 hours full load on prime95 as the temperature never went above 66C for overclock 4GHz using 4 cores, 4 threads with lower vcore at 1.184v with a push-pull fans of 1371rpm and 1369rpm. I use 21.0x, 191MHz and 4011MHz using intel turbo boost enabled and set extreme performance enabled as well. With a two x Noctua NH-U12P fans with a Prolimatech Megahalems Performance CPU Cooler with MX-2 thermal paste. You can even see there is a 100% full load not 99.5% but a maximum of 100% full load at all time for 2 hours.

I am happy with this result without any crash. I am going to try to get HT enabled now with all same setting to see what the temperature is like after 2 hours.

Hope it won't crash with HT enabled on.

 

[[timko]]

Are you sure the tjmax is set correctly this time?

(for everyone else, his tjmax was wrong at the start of this thread -> http://forums.overclockers.co.uk/showthread.php?t=18036199 )

 

[DragonQ]

I was going to be amazed but then I saw you had HT off. :/

 

[bulldog147]

Yep, the tjmax set at 100 this time. As you will the photo of realtemp is tjmax of 100. Because of this :

64 63 61 61
36 37 39 39

= 100 tjmax

 

[bulldog147]

I was going to be amazed but then I saw you had HT off. :/

Yep, it HT set it as OFF. But, I am gonna to try HT enabled now with another 2 hours full load and see what happen ?

 

[PiKe]

Run IBT it's much better than prime.

 

[bulldog147]

Run IBT it's much better than prime.

IBT ? Where can I get it from ?

 

[PiKe]

http://downloads.guru3d.com/IntelBurnTest-v2.3-download-2047.html

 

[cotton_flex]

Intel Burn Test, just google. Much quicker then prime and stresses more.

5 runs for a quick check. 25 runs, you've got it pretty much stable. 75 runs (about an hour) and you've got a very stable system.

 

[bulldog147]

Ok cheers for that. I will run IBT after I had done HT enabled for 2 hours prime95 and then will run IBT on 4 threads then 8 threads but which one is best to get stable test eg: 5, 25 or 75 ?

I probably use 75 instead.

 

[bulldog147]

I start to worry if vcore of 1.184 is safer for 4GHz ?

 

[PiKe]

Try 5 runs first, if its stable at that then try 25 then 75, otherwise you'll waste a lot of time just waiting for it to finish.

 

[DragonQ]

Don't run IBT on 8 threads, it'll insta-fail. Use the 16 thread option when HT is enabled.

 

[bulldog147]

I had now completed 2 hours full load with prime95 of HT enabled with same setting as 1.184 vcore. Temperature not bad at 76C.



Going to run IBT on 5, 25 and 75 on 4 threads and 8 threads now. So far, no crash on both 4 and 8 threads for 1.184vcore. Wish me luck.

 

[bulldog147]

IBT all passes without fail ! on 4 threads and 8 threads. I had now saved all the profile on the bios. Happy with it now. I can't be bothered with 4.2GHz. Left alone with 4.0GHz is good enough for me with temperature staying below 76C.

 

[mithrandir]

I don't use prime anymore. It's IBT, LinX or OCCT for me now.

 

[bulldog147]

OCCT doesn't work on my vista ultimate 64 bit ?

But, IBT and Linx does work.

 

[bulldog147]

Someone metion me that overclock 4Ghz at 1.184vcore is very bad indeed ? is that true ? They say best on safe side is 1.26 to 1.30vcore ?

 

[cotton_flex]

Not mentioned, but make sure you have an front intake fan as well.

With my Q9550, it has reduced temps by 5-8 degrees. I was hitting close to 70 without it.

Has done wonders with the HD4870 as well, stays cooler & less noise from the stock fan!

 

[DragonQ]

meone metion me that overclock 4Ghz at 1.184vcore is very bad indeed ? is that true ? They say best on safe side is 1.26 to 1.30vcore ?

If it's stable then what's the problem?