Question i9 12900k 5.1 P-Cores / 4.0 E-Cores @ 1.29V | LLC 6

Mar 30, 2022
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My experience overclocking the 12th Gen i9 12900K

CASE: Thermaltake View 51
MOTHERBOARD: MSI MPG Z690 EDGE WIFI DDR4
CPU: Intel® Core™ i9-12900K Processor
MEMORY: Corsair Vengeance RGB Pro 32GB (2x16GB) DDR4 3200 (PC4-25600) C16
GPU: GeForce RTX™ 3090 24GB GDDR6X - GIGABYTE GAMING OC
POWER SUPPLY: 1050 Watts - Enermax EDT1050EWT MaxTytan Series 80 PLUS Titanium certified
Cooler: Thermaltake Water 3.0 360mm ARGB Sync Edition
Storage: (2 drives 1TB each) - 2 X 1TB WD Blue SN550 NVMe M.2 SSD + 3TB Barracuda HDD
OS: Windows 11 Home (64-bit Edition)

Ok, so on this MSI MPG Z690 EDGE, I had an issue where it was showing bus clock at 98.88 MHz, so I did change CPU Base Clock in bios to 100.3 to begin with.
  • Removed all power limits
  • Set all P-Cores to 5.1
  • Set all E-Cores to 4.0
  • CPU Ratio Mode: Fixed Mode
  • CPU Ratio Offset When Running AVX: 0
  • CPU Voltage at 1.29 / Override mode
  • Extreme Memory Profile XMP: Enabled
  • Disabled Intel C-State
  • Disabled EIST
  • Disabled Intel Turbo Boost
  • Disabled Intel Speed Shift Technology
  • Disabled TVB Ratio Clipping
  • Disabled TVB Voltage Optimizations
  • Under DigiALL Power Set LLC > MODE 6
Managed to pass very stable on: Intel Burn Test , Cinebench R23 , and 10 hours so far of Prime95 (Smallest FFTs) at max temp of 93C (room temperature 22.7C).
Overclock achieved: i9 12900k 5.1 P-Cores / 4.0 E-Cores @ 1.29V | LLC 6

I have to admit, playin with the LLC and setting it to MODE 6 is what made it for me. Leaving LLC on auto was driving my temps up way too high.

Let me know your thoughts?

Attached are some screenshots of HWinfo numbers straight after completing the Cinebench R23 test | Score: 28257 on the multicore test.

QUESTION: On the LAST screenshot, can someone explain why " CORE CLOCKS " staying at 4552.2MHz instead of 5102.5MHz as in the P-Cores?

 
Looks very good. Still using adaptive on my 12700K and thus vcore hits 1.327 at load with an LLC of 6 (5.2GHz on 1 and 2 cores and then all the way down to 5GHz all core) though I prefer to let the vcore drop when not under load. Is there any real difference in fixed/Override vs adaptive?

Have to admit, finding Alder Lake a bit of a harder learning curve on the settings especially around vcore.
 

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