I7 10700 CPU question

[Rocky_53 1,579]

Forgive me if this is a dumb question.... I'm looking at a new PC and I'm checking out individual components. The first thing at the top of the list is the I7 107000, but I am a little confused (not a hardware kinda guy!) the specs on the website say 

•  3.80GHz Clock Speed
•  5.1GHz Single Core Max Turbo

So does this mean if I want to run it with turbo switched on, and take it to 5Ghz with the appropriate cooler, it will not run with hyperthreading on and only run on a single core? If this is the case, it makes a bit of a mockery of things doesn't it?

Advice appreciated, thanks.

Edited August 31, 2020 by Rockliffe

[JimBrown 596]

"Single core Max Turbo" is slightly misleading. It means that each individual core can turbo up but only the best cores can get to 5.1GHz. Not that only one of them can turbo up. It is automatic and is based on load and limits. As the load increases, the turbo frequency increases. But temps and other things can limit it. Hyperthreading on or off is not relevant. At least that's how I understand it. More info here:

https://www.intel.ca/content/www/ca/en/support/articles/000007359/processors/intel-core-processors.html

And here:

https://www.intel.com/content/www/us/en/gaming/resources/turbo-boost.html#:~:text=Intel® Turbo Boost Max,6 7 8

...jim

PS. I'm assuming you are looking at a i9-10700K.

Edited August 31, 2020 by JimBrown
Added PS

[Rocky_53 1,579]

43 minutes ago, JimBrown said:

"Single core Max Turbo" is slightly misleading. It means that each individual core can turbo up but only the best cores can get to 5.1GHz. Not that only one of them can turbo up. It is automatic and is based on load and limits. As the load increases, the turbo frequency increases. But temps and other things can limit it. Hyperthreading on or off is not relevant. At least that's how I understand it. More info here:

https://www.intel.ca/content/www/ca/en/support/articles/000007359/processors/intel-core-processors.html

And here:

https://www.intel.com/content/www/us/en/gaming/resources/turbo-boost.html#:~:text=Intel® Turbo Boost Max,6 7 8

...jim

PS. I'm assuming you are looking at a i9-10700K.

Hey Jim, thanks for the explanation, appreciated. No, definitely the I7 10700! I think you mean the I9 10900?  

Edited August 31, 2020 by Rockliffe

[Bob Scott 7,721]

There's a core clock multiplier scheduler in the CPU that will scale up the CPU speed as a function of both core loading and power consumption.  With the i7-10700 you are stuck with the stock turbo-boost schedule. 

Jim has it backwards--as the load increases, the turbo frequency decreases.  The max 5.1 boost would be for a single-core load.  As the number of cores in use and the power draw increases, the clock mult is decreased to keep the CPU within its stock thermal power limits.  P3D and MSFS are both multi-core loads...off the top of my head, I believe that the max all-core clock on the 10700 is 4.8GHz, and then only if the total power remains below the TDP threshold.

With the "K"-suffix CPU (e.g. i7-10700K) and a mobo with a Z490 chipset, you can override that scheduling.

[ducaud 9]

Hello Bob, that was very good information. I have another question that you might know the answer.

I will be buying shortly (as soon as the RTX 3090 Ampere based cards come out ) a new system.

I have been looking at different CPU's

There is the i9-10900k 3.7 and the i9-10850K 3.6  what I noticed is that the 10900k is almost twice as expensive than the 10850k. I assume being both K they can be both overclocked.

Is the difference in specs worth the price. Would i noticed a big difference in running P3DV5 or MFS2020 with either card? What is tye difference between both CPU's?

The rest of the system build will be a motherboard with a Z490 chipset I am looking at one of th Gigabyte Aorus, or some of the Asus ROG motherboards.

Will probably ad 32 GB of DDR4 3600 of memory.

Thanks

Juan

 

[Rocky_53 1,579]

9 hours ago, w6kd said:

There's a core clock multiplier scheduler in the CPU that will scale up the CPU speed as a function of both core loading and power consumption.  With the i7-10700 you are stuck with the stock turbo-boost schedule. 

Jim has it backwards--as the load increases, the turbo frequency decreases.  The max 5.1 boost would be for a single-core load.  As the number of cores in use and the power draw increases, the clock mult is decreased to keep the CPU within its stock thermal power limits.  P3D and MSFS are both multi-core loads...off the top of my head, I believe that the max all-core clock on the 10700 is 4.8GHz, and then only if the total power remains below the TDP threshold.

With the "K"-suffix CPU (e.g. i7-10700K) and a mobo with a Z490 chipset, you can override that scheduling.

Hi Bob, thanks for the interesting reply, appreciated. So I am remaining still a little confused, so please bare with me 🙂 I notice the Intel Comet Lake 10700K CPU is advertised at core speed of 3.8Ghz and a turbo boost speed of 5.1Ghz, so if I want to take advantage of the turbo boost and run at 5.1Ghz, would I need to have the MSI Z490 or could I also do so with the Z390 MB?

[regis9 4,014]

10 hours ago, ducaud said:

There is the i9-10900k 3.7 and the i9-10850K 3.6  what I noticed is that the 10900k is almost twice as expensive than the 10850k. I assume being both K they can be both overclocked.

Interesting, I had never heard of this cpu before this post.  According to this review it’s very close to the 10900k in gaming performance.  
 

https://www.techpowerup.com/review/intel-core-i9-10850k/

I would assume these are 10900k’s that “lost” the silicon lottery?  In any case, this review concludes that the performance difference is very small compared to the money you save though it notes a $50 price drop roughly rather than half the price.

 

Edited September 1, 2020 by regis9

[Bob Scott 7,721]

5 hours ago, Rockliffe said:

Hi Bob, thanks for the interesting reply, appreciated. So I am remaining still a little confused, so please bare with me 🙂 I notice the Intel Comet Lake 10700K CPU is advertised at core speed of 3.8Ghz and a turbo boost speed of 5.1Ghz, so if I want to take advantage of the turbo boost and run at 5.1Ghz, would I need to have the MSI Z490 or could I also do so with the Z390 MB?

The Z390's FCLGA1151 CPU socket is not compatible with the 10th-gen chips, which use the new FCLGA 1200 socket, so the Z390 is not an option for the 10700K.  You'll need a Z490 motherboard to clock the CPU at other than the stock turbo boost schedule.

[Rocky_53 1,579]

1 hour ago, w6kd said:

The Z390's FCLGA1151 CPU socket is not compatible with the 10th-gen chips, which use the new FCLGA 1200 socket, so the Z390 is not an option for the 10700K.  You'll need a Z490 motherboard to clock the CPU at other than the stock turbo boost schedule.

Appreciated Bob, thanks.