Background
Background
Background
Background
Background

Core i3-8121U vs Core i9-12900K

Core i3-8121U vs Core i9-12900K: game performance, price, value, and specification comparison. Select comparison game parameters.

Availability

No items available

Availability

MSRP $599

No items available

Key Differences

In short — Core i9-12900K outperforms Core i3-8121U on the selected game parameters. We do not have the prices of both CPUs to compare value. The better performing Core i9-12900K is 1279 days newer than Core i3-8121U.

Advantages of Core i3-8121U

  • Consumes up to 88% less energy than Intel Core i9-12900K - 15 vs 125 Watts

Advantages of Core i9-12900K

  • Performs up to 62% better in Assassin's Creed Mirage than Core i3-8121U - 147 vs 91 FPS
  • Can execute more multi-threaded tasks simultaneously than Intel Core i3-8121U - 24 vs 4 threads
  • Works without a dedicated GPU, while Intel Core i3-8121U doesn't have integrated graphics
Calculator background
This is a free version of Assassin's Creed Mirage.
Assassin's Creed Mirage

Assassin's Creed Mirage

Resolution

1920 x 1080

Game Graphics

Ultra High

Intel Core i3-8121U Logo
Core i3-8121U

Mobile • May 5th, 2018


FPS

91

62%

Value, CA$/FPS

Price, CA$

Intel Core i9-12900K Logo
Core i9-12900K

Desktop • Nov 4th, 2021


FPS

147

100%

Value, CA$/FPS

Price, CA$

FPS Winner

Trending Games

With selected game settings

Resolution

1920 x 1080

Game Graphics

Ultra High

Intel Core i3-8121U Logo
Core i3-8121U

Mobile • May 5th, 2018

Intel Core i9-12900K Logo
Core i9-12900K

Desktop • Nov 4th, 2021

Geekbench 5 Benchmarks

Intel Core i3-8121U Logo
Core i3-8121U

Mobile • May 5th, 2018


Single-Core

1133

43%

Multi-Core

2344

15%

Intel Core i9-12900K Logo
Core i9-12900K

Desktop • Nov 4th, 2021


Single-Core

2620

100%

Multi-Core

15445

100%

Intel Core i3-8121U Logo

Core i3-8121U

vs
Intel Core i9-12900K Logo

Core i9-12900K

May 5th, 2018Release Date
Nov 4th, 2021
Core i3CollectionCore i9
Cannon LakeCodenameAlder Lake
Intel BGA 1440SocketIntel Socket 1700
Mobile
Segment
Desktop
2Cores
16
4Threads
24
2.2 GHzBase Clock Speed
3.2 GHz
3.2 GHzTurbo Clock Speed
5.2 GHz
15 W
TDP125 W
10 nmProcess Size10 nm
22.0xMultiplier
32.0x
NoneIntegrated Graphics
UHD Graphics 770
NoOverclockable
Yes

PCs Using Core i3-8121U or Core i9-12900K

With selected game settings

Similar CPU Comparisons

Select from the most popular similar processor comparisons. Most compared processor combinations, including the currently selected ones, are at the top.

Copyright © 2025 HowManyFPS. All rights reserved.

Have a suggestion or a business inquiry? [email protected]

Cookies Policy

As an Amazon Associate HowManyFPS earns from qualifying purchases.