Intel Core i9-11900K vs Intel Core i9-12900K Full Specs

Summary

8 Cores 16 Threads 3.5GHz	16 Cores(8P+8E) 24 Threads(16P+8E) 3.2GHz
TDP 125W	TDP 125W
Bandwidth 51.2GB/s DDR4	Bandwidth 76.8GB/s DDR5·DDR4
iGPU UHD 750 1300MHz	iGPU UHD 770 1550MHz
Peak·FP32·FP16 1.33 TFLOPSFP16	Peak·FP32·FP16 1.59 TFLOPSFP16
Socket LGA 1200	Socket LGA 1700

Highlights

Geekbench 6 Single

Geekbench 6 Single Geekbench 6 Multi Max Bandwidth iGPU Peak iGPU FP32 iGPU FP16 TDP

Core i9-11900K2,672

x1.02

Core i9-12900K2,619

x1

Show Top Score

Core Config

8 Cores 8P -	16 Cores 8P 8E
16 Threads 16P -	24 Threads 16P 8E

Clocks

Base Clock 3.5GHz	Base Clock 3.2GHz
Boost Clock 5.2GHz	Boost Clock 5.2GHz
Overclocking Unlocked	Overclocking Unlocked

Cache

L1i 32KB P -	L1i 32KB P 64KB E
L1d 48KB P -	L1d 48KB P 32KB E
L2 512KB P -	L2 1.25MB P 4MB E shared
L3 16MB	L3 30MB

Memory

Type DDR4	Type DDR5·DDR4
Max Memory 128GB	Max Memory 128GB
ECC No	ECC No
Channels 2	Channels 2
Bus Width 128-bit	Bus Width 128-bit
Speed 3200MT/s	Speed 4800MT/s
Bandwidth 51.2GB/s	Bandwidth 76.8GB/s
Bandwidth Calculator Channels Transfer Rate3200MT/s UC·Spec·OC 51.2GB/s	Bandwidth Calculator Channels Transfer Rate4800MT/s UC·Spec·OC 76.8GB/s

Power & Thermals

TDP 125W	TDP 125W
Peak Power 295W	Peak Power 241W
Max Operating Temp 100°C Max	Max Operating Temp 100°C Max
Included Cooler 0	Included Cooler 0

Chipset Bus

Bus Type DMI	Bus Type DMI
Bus Config 8 lanes	Bus Config 8 lanes
Bus Speed 8GT/s	Bus Speed 16GT/s
Bus Bandwidth 8GB/s	Bus Bandwidth 16GB/s

Expansion

PCIe PCIe 4.0 x20 39.4GB/sBandwidth	PCIe PCIe 5.0 x16 63GB/sBandwidth
-	PCIe Secondary PCIe 4.0 x4 7.9GB/sBandwidth

iGPU

iGPU UHD 750 1300MHz	iGPU UHD 770 1550MHz
Shaders 256	Shaders 256
Boost Clock 1.3GHz	Boost Clock 1.55GHz
Peak·FP32·FP16 1.33 TFLOPSFP16	Peak·FP32·FP16 1.59 TFLOPSFP16

NPU

NPU Model GNA 2.0

NPU Model GNA 3.0

Chip

Manufacturer Intel	Manufacturer Intel
ISA x86-64	ISA x86-64
Architecture Rocket Lake	Architecture Alder Lake
Family Core 11th Gen	Family Core 12th Gen
Branding	Branding
Codename Rocket Lake-S - Cypress CoveP-Core -	Codename Alder Lake-S Alder Lake-8P-8EVariant Golden CoveP-Core GracemontE-Core
Market Segment Desktop	Market Segment Desktop
Release Date Mar 16, 2021	Release Date Nov 4, 2021
Part Number CM8070804400161, BX8070811900K	Part Number CM8071504549230, BX8071512900K
S-Spec SRKND (B0)	S-Spec SRL4H (C0)

Fabrication

Foundry Intel	Foundry Intel
Fabrication Node 14nm++++	Fabrication Node Intel 7
Die Size 276mm²	Die Size 202mm²
Transistor Count 6.9B	Transistor Count 14.6B
Transistor Density 25 MTr/mm²	Transistor Density 72 MTr/mm²

Images