Intel Core Ultra 9 285k 'Arrow Lake' Discussion/News ("15th gen") on LGA-1851

[MartinPrince]

...Personally I have a lot of problems with CPU reviews not giving enough spread of information and often misleading i.e. counter-intuitively the power use of some CPUs in gaming at 4K rises significantly over 1080p, etc.

This could be correct but do you have any examples of games where this is shown to be the case?

 

[Grim5]

Higher power draw at 4k would only make sense if the cpu is working harder and that's only possibly if the game is doing something different based on the resolution - for example graphical effect that scales with resolution and uses the CPU to calculate

 

[Rroff]

This could be correct but do you have any examples of games where this is shown to be the case?

7800X3D some reviewers found power draw increased with resolution, I'm not sure why, it has also been seen with some Intel 11th gen.

 

[Mr Jack]

7800X3D some reviewers found power draw increased with resolution, I'm not sure why, it has also been seen with some Intel 11th gen.

One would presume it's to do with core utilisation. Some graphics stuff easier to parallelise than core gameplay?

 

[Rroff]

One would presume it's to do with core utilisation. Some graphics stuff easier to parallelise than core gameplay?

I don't know and unfortunately not enough reviewers do testing to tell whether it is actually a thing or a mistake on the part of those reviewers for example:

When comparing the AMD Ryzen 7 7800X3D to the more expensive Ryzen 9 7950X3D, we noticed that the latter draws the most power when gaming at 1080p in F1 2022 with high settings. This is because 1080p is a resolution that relies more on CPU power than GPU power. During our testing, we observed power levels ranging between 71 and 76 watts on the 7950X3D at 1080p. However, when we switched to 4K, which is more GPU-dependent, the power draw on the 7950X ranged between 55 and 70 watts during our test run.


The behavior of the AMD Ryzen 7 7800X3D while gaming becomes even more intriguing and slightly strange, as it draws more power from the CPU at 4K than at 1080p. Although we cannot determine the exact reason for this, we do know that some CPU-driven visual effects in modern games are resolution sensitive, meaning there are edge cases where portions of the CPU workload can increase.

The AMD Ryzen 7 7800X3D Review: A Simpler Slice of V-Cache For Gaming

www.anandtech.com

It isn't the only CPU which exhibits that behaviour though.