[Sprkd1]

Before, if I recall correctly, when all cores were being used it would turbo up to 3.8 GHz. Now, it only turbos up to 3.5 GHz. It does turbo up to 3.8 GHz but only when fewer than all cores are being used. What's going on?

If you watch this video, you'll see a stock (if I am not mistaken) 3930K turboing up to 3.8 GHz during IntelBurnTest (which stresses all cores to the max). Mine only goes up to 3.5 GHz in this test.

 

[Blameless]

The 3930K is only supposed to turbo to 3.5GHz when all cores are in use.

Some motherboard makers have their boards use the max default turbo multiplier across all cores for better performance, and better looking benchmarks in reviews. This is usually perfectly stable, but is not strictly to spec. This has been referred to as Multi-core Ehancement.

Here is an article on the topic of: http://www.anandtech.com/show/6214/multicore-enhancement-the-debate-about-free-mhz

 

[Sprkd1]

Ah, ok. I did update my BIOS so I guess the changes came with that.

 

[Akadaka]

Sprkd1, in the bios they're is a option to put all turbo cores to 38.

type 38 in all of the turbo feature.

turbo core 1 = 38
turbo core 2= 38
turbo core 3 = 38
turbo core 4 = 38
turbo core 5 =38
turbo core 6 =38