Intel Core i9 12900K vs Intel Core i7 1255U
CPU · Specs Compare
General Parameters
Release Date
Oct 2021
Feb 2022
Manufacturer
Intel
Intel
Type
Desktop
Laptop
Instruction Set
x86-64
x86-64
Core Architecture
Alder Lake
Alder Lake
Processor Number
i9-12900K
i7-1255U
Integrated Graphics
UHD Graphics 770
Iris Xe Graphics (96EU)
Package
Manufacturing Process
10 nm
10 nm
Socket
LGA-1700
BGA-1744
Power Consumption
125 W
12-15 W
Peak Operating Temperature
100°C
100°C
Max Turbo Power Consumption
—
55 W
CPU Performance
Performance Cores
8
2
Performance Core Threads
16
4
Performance Core Base Frequency
3,2 GHz
1.7 GHz
Performance Core Turbo Frequency
5.1 GHz
4.7 GHz
Efficiency Cores
8
8
Efficiency Core Threads
8
8
Efficiency Core Base Frequency
2.4 GHz
1.2 GHz
Efficiency Core Turbo Frequency
3.9 GHz
3.5 GHz
Total Core Count
16
10
Total Thread Count
24
12
Bus Frequency
100 MHz
100 MHz
Multiplier
32x
17x
L1 Cache
64 K per core
80 K per core
L2 Cache
14 MB shared
1280 K per core
L3 Cache
30 MB shared
12 MB shared
Unlocked Multiplier
Yes
No
Memory Parameters
Memory Types
DDR5-4800, DDR4-3200
DDR5-4800, DDR4-3200, LPDDR5-5200, LPDDR4x-4267
Max Memory Size
128 GB
64 GB
Max Memory Channels
2
2
Max Memory Bandwidth
76.8 GB/s
76.8 GB/s
ECC Memory Support
Yes
No
Graphics Card Parameters
Integrated Graphics
true
true
GPU Base Frequency
300 MHz
300 MHz
GPU Max Dynamic Frequency
1550 MHz
1250 MHz
Shader Units
256
768
Texture Units
16
48
Raster Operation Units
8
24
Execution Units
32
96
Power Consumption
15 W
15 W
Miscellaneous
PCIe Version
5.0
4.0
PCIe Lanes
20
20
Benchmark
Cinebench R23
2,028
1,701
Cinebench R23
27,422
8,233
Geekbench 6
2,631
2,248
Geekbench 6
17,004
7,162
Blender
422
125
Geekbench 5
—
1,628
Geekbench 5
—
7,372
Passmark CPU
—
3,308
Passmark CPU
—
13,792
▲ Specs Compare
Data sourced from official specifications and benchmark tests.