i7 7700k Stuck at 4.7ghz OC

[huntlong]

So i just replaced my 7600k with a 7700k. My 7600k was OC’d to 4.7ghz. I decided to see if the 7700k was 4.7ghz stable at the same voltage and it is. I went back to my UEFI and changed the multiplier to 49 to test my luck. Restarted the PC and it will only clock up to 4.7ghz no matter the stress test. Any ideas?

 

[Dunlop0078]

That doesn't really make a whole lot of sense. Try a game or Prime95 version 26.6 or something else that doesn't use AVX instructions and see if the clock goes up to 4.9ghz.

Or go into your BIOS and look for an option called AVX offset. I linked a picture of it below in an asus BIOS. If that is set to 2 it means the CPU will underclock itself by 200mhz whenever it sees AVX instructions.

 

[photonboy]

Are you sure the 4-core limit is 4.9GHz (49 multiplier for all cores)?

Also, I would watch the temperature and aim for about 75degC all cores under something like Prime95 or Blender using all threads (not Prime95 as that is unrealistically stressful).

 

[huntlong]

Bios is set to sync all cores. AVX offset is 0. I actually have an ASUS Z270-A so my bios looks just like that.

 

[huntlong]

Okay so after more testing i have found that i can definitely can set the multiplier to anything 47 or less and it will actually apply that OC. I tried to OC per core and it still won’t actually run higher than 4.7ghz in windows

And I’m not saying that I’m crashing. I can open HWmonitor and it will show that my multiplier is 47 no matter if it’s 48 49 or 50. But 47 46 and 45 all work fine.

 

[photonboy]

Hmmm... maybe try setting the UEFI back to factory defaults.

Be careful though to note some settings such as Secure Boot which may prevent bootup if set to the wrong setting.

So maybe do that, boot to Windows, then exit and go back into the BIOS.

I thought maybe there was some GLITCH that might reset.

Having said that, a solid 4.7GHz is still pretty good and there are potential TEMPERATURE SPIKE issues discussed by Intel which can cause STUTTERS in games occasionally even if normal monitoring suggests the temperature is fine (i.e. under 80degC).

 

[huntlong]

I decided last night if i can’t go past 4.7 might as well have a good 4.7 so i dialed the voltage down to 1.2v and Aida64 hovers around 60-65 degrees on a Cryorig H7 Quad.

 

[photonboy]

I decided last night if i can’t go past 4.7 might as well have a good 4.7 so i dialed the voltage down to 1.2v and Aida64 hovers around 60-65 degrees on a Cryorig H7 Quad.

I'd stay there then. Getting 4.9GHz vs 4.7GHz is only a potential gain of 4% performance, and in most games that would probably not even change anything as the BOTTLENECK is more likely to be the graphics card.

For non-gaming it's usually even less critical. Even with HANDBRAKE or similarly demanding programs you would probably not gain more than 2% time savings.

 

[huntlong]

I decided last night if i can’t go past 4.7 might as well have a good 4.7 so i dialed the voltage down to 1.2v and Aida64 hovers around 60-65 degrees on a Cryorig H7 Quad.

I'd stay there then. Getting 4.9GHz vs 4.7GHz is only a potential gain of 4% performance, and in most games that would probably not even change anything as the BOTTLENECK is more likely to be the graphics card.

For non-gaming it's usually even less critical. Even with HANDBRAKE or similarly demanding programs you would probably not gain more than 2% time savings.

Yeah it’s just the fact that I should be able to try whatever multiplier I want. I might have the golden 5ghz low voltage chip and never know it haha. Thanks for the help though.