Both CPUs, i13900K or i13700K, have 8 performance cores. The difference are the efficient cores (16 or 8). Somewhere I've read the effcient cores should be excluded for the sim (Prepar3D) since they could cause stutters.

So if only performance cores are used for CPU hungry sims, why buying the more expensive i13900K? Because of 5.8 GHz Turbo instead of 5.6 GHz?

Another difference is power consumption. How can the i13700K have a max. TDP of 125 W, whereas the i13900K has one of 253 W? The efficient cores are should not be the most power using parts.

Looking forward to your opinions?

Dan

If you don't get the 13900k you'll always wonder what you missed out on. And do you really care about the power? Really? 😁

My advice: Don‘t waste your money. MSFS (as well as all older sims) still uses core 1 the most. The CPU clock is much more important than the number of cores. All 13th generation CPUs have a sufficient number of cores. I have the i5 13600K (overclocked at 5.6 GHz and combined with a RTX 3090) and couldn‘t be happier. You better spend more on the GPU.

Edited May 27, 20233 yr by Flyfox

4 hours ago, odourboy said:

If you don't get the 13900k you'll always wonder what you missed out on. And do you really care about the power? Really? 😁

Well yes, when in the summer my flightsim office will be heated up by the rig. Even with my i9700K, i have a heating in the room 😄

I wonder, if it uses that much energy (twice) does it run twice as fast?

That point with the "miss out" I know well, cause I went for the 9700 last time and always wondered, if the 9900 had been better. But all the years before, I had HT turned off, so I really don't know why buying hyperthreading. 

Edited May 27, 20233 yr by blaunarwal

1 hour ago, Flyfox said:

My advice: Don‘t waste your money. MSFS (as well as all older sims) still uses core 1 the most. The CPU clock is much more important than the number of cores. All 13th generation CPUs have a sufficient number of cores. I have the i5 13600K (overclocked at 5.6 GHz and combined with a RTX 3090) and couldn‘t be happier. You better spend more on the GPU.

Thanks for your opinion. Even the all new MSFS has its roots from FSX no doubt. I already have the RTX 3090 for two years and plan to transfer it to the new system.

very informative video on power/performance comparison (of flight sims) that might benefit some one, (thanks to the author of the video);

 

On 5/27/2023 at 3:33 AM, Flyfox said:

My advice: Don‘t waste your money. MSFS (as well as all older sims) still uses core 1 the most. The CPU clock is much more important than the number of cores. All 13th generation CPUs have a sufficient number of cores. I have the i5 13600K (overclocked at 5.6 GHz and combined with a RTX 3090) and couldn‘t be happier. You better spend more on the GPU.

My 8-core system shows pretty even utilization across all 8-cores (i7-9700K @ 4.7 GHz).  Here are two screen shots flying the TBM out of KSAN with most settings at Ultra in order to stress the system:

 

Edited May 31, 20233 yr by TacomaSailor
Better image