i7 3770 not stable at 3.9 ghz..

[demon08]

hye
just ordered a asus h77 v model for i7 3rd gen 3770 but now having difficult time as Intel suggest that 3770 uses 1 and 2 core at 3.9 GHz and 4 core at 3700 MHz at full load .. but when checking with prime95 with only 2 threads it mostly stables at 3.7ghz but for a sec only reaches 3.8ghz and some times reaches 3.9ghz ... only for a sec . my question is why this is not stable at 3.9ghz as Intel suggest in site.... iam not getting why its never stop at 3.9ghz for even few SECONDS...

 

[FalseChristian]

Unfortunatley the Ivy Bridge and Haswell CPUs are not near as good overclockers as, say, my Sandy Bridge i5 2500K at 4.635GHz. This is why I'm not 'upgrading' for some time.

 

[unixwizzard]

what's do you mean by not stable?

I have a 3770 non K and I have no problem running all 4 cores at 4.1Ghz using just the basic built in overclocking on the BIOS (Asus P8Z77-V).. Did you enable any of the overclocking in your BIOS?

also when running prime95 set it to run 8 jobs/threads.. that way you are working all the cores at once instead of the processor switching the work between cores as it will do with only 2 threads running..

this is mine running prime95 w 8 threads:

 

[Subyman]

Are you looking at stock Turbo performance? Turbo adjusts dynamically to load and typically only one core will see the higher 3.9Ghz bin. It has nothing to do with stability. It has to do with the CPU staying within its target TDP and frequency depending on the load.

 

[GreenChile]

Unfortunatley the Ivy Bridge and Haswell CPUs are not near as good overclockers as, say, my Sandy Bridge i5 2500K at 4.635GHz. This is why I'm not 'upgrading' for some time.

That's not an entirely fair statement. My 3770K is OC'd to 4.7GHz and is very stable in a multitude of stress tests run for 24 hrs each.

IB and Haswell tend to be slightly worse at overclocking than SB but the IPC gain more than makes up for it.

 

[Liquid_Static]

Stock turbo mode, which I"m assuming is what you're running on, is dependent on a variety of factors including temperature which can artificially limit clock speeds.

 

[demon08]

.. can you tell how make stable at 3.9 ghz ... and does your 3770 remains at 4.1 ghz all time ... Intel said that 3770 uses 1 and 2 core at 3.9 GHz and 4 core at 3700 MHz at full load .. but my 3770 is running at 4 cores even the system usage is 5 % . when the CPU cores is at 1600mhz it shows CPU temp idle to 39-41c but within few minutes when there is no load just 5-8% the CPU core frequency is at 3700.mhz and cpu temps reached 55-60c .. . and then after 5 SECONDS it reaches 1600mhz ...are temp going rise if the CPU uses 4 cores please help..

 

[sm625]

hye
just ordered a asus h77 v model for i7 3rd gen 3770 but now having difficult time as Intel suggest that 3770 uses 1 and 2 core at 3.9 GHz and 4 core at 3700 MHz at full load .. but when checking with prime95 with only 2 threads it mostly stables at 3.7ghz but for a sec only reaches 3.8ghz and some times reaches 3.9ghz ... only for a sec . my question is why this is not stable at 3.9ghz as Intel suggest in site.... iam not getting why its never stop at 3.9ghz for even few SECONDS...

In addition to prime95, you have several dozen other threads running, and the load that they place on your cpu, though small, pushes the cpu into its 4-core-active turbo mode at 3.7GHz. Only during those very brief moments of total background process inactivity will your cpu enter into 2-core-turbo and clock all the way to 3.9 Ghz. If you want to see it run at 3.9GHz during a prime95 2-thread test, you need to literally kill almost all of your system processes and services. Basically, just kill every one that it will allow you to kill. You'll need to reboot afterwards... lol. It's not really worth it but you will see it hit 3.9GHz and stay there the majority of the time.

 

[tweakboy]

You must increase the CPU voltage. gl

Try running stock and see how it is. gl