cascade lake X HUGE decrease perfomance!!!

[PanosXidis24]

So i modified with new Cpu microcode for 50657 the new MC is 05003801 i see huge decrease perfomance up to 50% and cpu is hotter than older like 029-010-024 so stay away from this microcodes intel need to rework for that problem

[restsugavan]

There are new algorithms on latest revision both SKX and CLX to avoid hacking Gather Instructions target buffer when performing FMA3 both 256/512 bit operation. 

The algorithm doing well to protect hackers from microarchitecture target buffer stolen data. But It was incredible latency above perform FMA3 operation. 

Thus the CPU will running hotter and performance of FMA3 operation that once Intel microarchitecture advantage over AMD Zen microarchitecture decrease.

Intel had no more cards on this trick, Lion Cove microarchitecture also performance decreased on FMA3 operation due it split integer and floating point away to avoid downfall mitigation.

[PanosXidis24]

I see affect SKYLAKE-X aswell same

[PanosXidis24]

anywhere to see changelog?i dont know intel releases cpu microcode for fix stuffs combatibility or only security?

[tistou77]

I test each new firmware and haven't seen any real difference compared to those from 2024 (or even 2023).
Compared to the first ones, yes, there are differences.

[restsugavan]

 CPU Performance on latest Windows Insider Preview Canary Edition 27808.1000 Best registry tuning by Microsoft PC Manager

 Compare with old school microcode 02006906 before Downfall Mitigation series microcode.

Sitting on present day , According to Trumpt policie latest minute Intel Ohio Fab may delay to 2030 or beyond.

Chip Act Fund was cut down already thus Intel 18A 14A also RobbinFet Technology all are reject at least 5-years from here.

More than I can say , Panther Lake Nova Lake will adopt TSMC Fab following Arrow Lake until 2030 or beyond. 

[tistou77]

@restsugavan   a écrit :

CPU Performance on latest Windows Insider Preview Canary Edition 27808.1000 Best registry tuning by Microsoft PC Manager

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@restsugavan Do you know what modification was made to the registry ?
The one known for the famous Spectre and Meltdown ?

[restsugavan]

@tistou77  The new method registry modify bring CPU time tighten on each task scheduler. 

You'll notice my Windows 11 25H2 Canary 27808.1000 had minimum process and thread after registry optimized by Microsoft PC Manager just one click boost.

[tistou77]

Ok, I would have to find out what PC Manager modifies in the registry 🙂

60 process for me 😄

[PanosXidis24]

I test so many of them and yes 010 mc has problems with 3600+ higher and on 024 not has the problem,029 to much heat compare 024 so i stay on 024