Intel 12900K compatibility

[till_botterweck]

Good evening,
i just got a new Computer with Intel Alder Lake CPU 12900K.
As you may know, latest Intel CPUs feature so called Performance and Efficiency Cores.

It seems like V-ray for 3ds Max does not utilize any of the Performance Cores as of now.
Is this working as Intended?


I observed CPU bucket rendering in Task Manager and in HWinfo and only the E-Cores get utilized.
All 16 P-Core Threads are below 5% so basically not doing anything.
I tried rendering in Cycles Blender (BMW demo Scene) and i get 100% CPU usage, so i conclude that the sensor readings are fine and that the P-Cores are not yet supported in V-ray.
This conclusion correct or i found an exception?


Testing Conditions:

Asus Prime Z690-A
Intel 12900K
Windows 10 64x latest Updates
3dmax 2022.3
V-Ray 5.20.01, update 2.1


Thanks in advance!
Moritz

[Muhammed_Hamed]

Hey till_botterweck and welcome to the forum!

Please check this discussion here, it seems that Power plan and upgrading to Windows 11 might solve the issue
On another note, this Motherboard is entry level for this platform. It is not gonna work out for rendering with this CPU, you need to spend 400-500 Euros on a good board for this CPU because of the high power consumption

Best,
Muhammed

[till_botterweck]

Hello Muhammed_Hamed, thank you for the reply!
Im aware that im supposed to use windows 11 for this CPU, but i was hoping that i dont have to upgrade to windows 11 just yet.
But i will put a windows 11 install on that machine and see if it works or introduces new problems.

You mention the Mainboard not being suitable for the power Consumption of the CPU.
Do i understand correctly: The issue is when i have this board under full load for several days/weeks, that the capacitors might fail?
Or what do you mean? I had no issues to reach max boost clocks (as advertised by intel) on both Core types, so im pretty sure the board supplys sufficient Power?


I would very much appreciate if you could elaborate on this point!
Thank you in advance

[^Lele^]

Here is an unofficial fix, and the official Chaos stance on the issue.

https://forums.chaos.com/forum/v-ray...39#post1143539