[SOLVED] K vs non-K i7 - Undervolting - same TDP?

[ck_42]

I know it's a weird question compared to what is normally asked about, but what I'm trying to determine is...

#1 Can I take a K version of an Intel cpu and UNDER-clock it to the same as the non-K version cpu?
#2 Will the TDP of the K version cpu then essentially be the same as the non-K version?

Why you ask?
I don't care about the higher speeds as much as I care about the lower TDP, but I can currently purchase a K-version cheaper. But if I
got the K version, I would want to have it run so that it's power levels are basically the same as the non-K version.

 

[DuRoC2020]

You can underclock and under volt the k so yes you can get to the same tdp or lower even.

 

[ck_42]

You can underclock and under volt the k so yes you can get to the same tdp or lower even.

Thanks for the response! Was figuring this to be the case, but wasn't sure.
Now....to find an actual mITX m/b supporting rocket lake that doesn't cost an arm and a leg.

 

[geofelt]

What processors are you looking at?
Seems like a no brainer to buy the K if it is cheaper.
There are many ways to limit power consumption other than under volting.

Perhaps list the rest of your proposed system?

 

[uWebb429]

Can I take a K version of an Intel cpu and UNDER-clock it

There is no need to underclock it. Just use ThrottleStop and set the two turbo power limits to whatever value you like. Here is how to convert a 125W TDP 10850K into a 65W CPU.

If you have a desktop motherboard you might be able to change the PL1 and PL2 turbo power limits in the BIOS. I prefer using ThrottleStop because it gives you access to the Clamp options in the power limit register to truly clamp power consumption to 65W.

The power limits are infinitely adjustable. Reducing the power limits allows the CPU to run as fast as possible without ever exceeding 65W. That is what you want. A fast, low power CPU.

The K series CPUs tend to be of a higher quality and can usually run the same speed or faster compared to a non K at the same power level. If you can find a K CPU cheaper, that is a win win.

 

[mdd1963]

Likewise, Intel's XTU will let you easily specify lower turbo clock speeds, and/or limit boost/power limit duration, apply a negative or positive core voltage offset, AVX offset, etc..

 

[mdd1963]

the K might be cheaper, assuming you already have a compatible cooling solution...but even a $20 price difference is quickly negated once needing to purchase a cooler comes into play...

 

[logainofhades]

the K might be cheaper, assuming you already have a compatible cooling solution...but even a $20 price difference is quickly negated once needing to purchase a cooler comes into play...

Intel's stock cooler is garbage. I would buy a cooler even for a non k chip.

 

[KyaraM]

Just undervolt the processor, especially if what you aim for is gaming. My undervolted 12700k runs at around 40-60W in games, which is within the 65W PL1 of the 12700, but with more power. It also hits 165W tops. You can also use the BIOS or XTU for both undervolting and PL adjustments.