Core i7 - 2600 running at 4.3 GHz by ASUS Motherboard

rasmasyean · Nov 17, 2017

I'm confused. This is not a "K" processor.

It says this in BIOS:
Target CPU Turbo-Mode Speed: 4326MHz

The Asus Suite II says it fluctuates from 16 to > 4GHz.

What exactly does a K CPU do?

For reference, these are the CPU/Motherboard:

Intel Core i7-2600 Sandy Bridge Quad-Core 3.4GHz (3.8GHz Turbo Boost) LGA 1155 95W BX80623I72600 Desktop Processor Intel HD Graphics 2000
https://www.newegg.com/Product/Product.aspx?Item=19-115-071

ASUS P8P67 (REV 3.0) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS
https://www.newegg.com/Product/Product.aspx?Item=N82E16813131705

13thmonkey · Nov 17, 2017

It's meant to go up to 3.8, but I wouldn't be at all surprised to see it going to 4.0.

With a k, you could probably get 4.4/4.5, but importantly you can tell it to do this. With non-k's you are hoping that the cooling is good enough for boost to push it up to 4.0, and that asus is playing a little loose with the definition of the stock speed.

I would have zero concern, and just be happy, it will not effect longevity.

rasmasyean · Nov 17, 2017

I'm using a stock heat sink. If I get a better one, will ASUS automatically make it go higher by measuring the new temperature?

13thmonkey · Nov 17, 2017

probably not, it'll have limits, but it'll be cooler and quieter,

rasmasyean · Nov 19, 2017

OK, let me see if I getting this.

I run some encoding that seems to make all 8 threads go >80%. CPU speed sticks to 103 x 39 = 4 GHz.

While sometimes when barely doing anything, I've seen the multiplier as 16, 39, 40, 41, 42.

Is 16 the "low power state"?
39 is the ASUS automatic overclock frequency?
40, 41, and 42 are the Turbo Boost steps that bring it up to 4.3 GHz?

What puzzles me is that it just jumps randomly to 40, 41, 42 when I'm barely doing anything. Yet when encoding (where it seems "turbo" is need most), it sticks to 39. What is the purpose of this? Or did I get this all wrong?

13thmonkey · Nov 20, 2017

rasmasyean :

The single core turbo is plus 4 steps, 2 cores are plus 3, 3 cores are plus 2 and 4 cores are plus 1. Only counting real cores not ht cores. That's just how the boost works as more power is pulled and heat generated the more cores are in play.

rasmasyean · Nov 21, 2017

So at what point will it jump to x38? That's "no turbo on any cores" right? Does my CPU have to get really hot or something?

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Core i7 - 2600 running at 4.3 GHz by ASUS Motherboard

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