AMD Ryzen 9 3900XT vs Intel Core i9 12900KF
We compared two desktop CPUs: AMD Ryzen 9 3900XT with 12 cores 3.8GHz and Intel Core i9 12900KF with 16 cores 3.2GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
AMD Ryzen 9 3900XT Advantages
Higher base frequency (3.8GHz vs 3.2GHz)
Larger L3 cache size (64MB vs 30MB)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (105W vs 125W)
Intel Core i9 12900KF Advantages
Released 1 years and 3 months late
Higher specification of memory (4800 vs 3200)
Larger memory bandwidth (76.8GB/s vs 47.68GB/s)
Newer PCIe version (5.0 vs 4.0)
Score
Benchmark
Cinebench R23 Single Core
AMD Ryzen 9 3900XT
1350
Intel Core i9 12900KF
+50%
2028
Cinebench R23 Multi Core
AMD Ryzen 9 3900XT
18437
Intel Core i9 12900KF
+48%
27422
Geekbench 6 Single Core
AMD Ryzen 9 3900XT
1763
Intel Core i9 12900KF
+52%
2686
Geekbench 6 Multi Core
AMD Ryzen 9 3900XT
11025
Intel Core i9 12900KF
+46%
16130
Cinebench 2024 Single Core
AMD Ryzen 9 3900XT
79
Intel Core i9 12900KF
+56%
124
Cinebench 2024 Multi Core
AMD Ryzen 9 3900XT
1074
Intel Core i9 12900KF
+45%
1564
Blender
AMD Ryzen 9 3900XT
261
Intel Core i9 12900KF
+62%
425
Geekbench 5 Single Core
AMD Ryzen 9 3900XT
1311
Intel Core i9 12900KF
+50%
1970
Geekbench 5 Multi Core
AMD Ryzen 9 3900XT
12279
Intel Core i9 12900KF
+42%
17469
Passmark CPU Single Core
AMD Ryzen 9 3900XT
2769
Intel Core i9 12900KF
+50%
4167
Passmark CPU Multi Core
AMD Ryzen 9 3900XT
32856
Intel Core i9 12900KF
+25%
41190
General Parameters
Jul 2020
Release Date
Oct 2021
AMD
Manufacturer
Intel
Desktop
Type
Desktop
x86-64
Instruction Set
x86-64
Zen 2 (Matisse)
Core Architecture
Alder Lake
-
Processor Number
i9-12900KF
AM4
Socket
LGA-1700
No
Integrated Graphics
No
Package
3.8 billions
Transistor Count
-
7 nm
Manufacturing Process
10 nm
105 W
Power Consumption
125 W
-
Max Turbo Power Consumption
241 W
95°C
Peak Operating Temperature
100°C
CPU Performance
12
Performance Cores
8
24
Performance Core Threads
16
3.8 GHz
Performance Core Base Frequency
3.2 GHz
4.7 GHz
Performance Core Turbo Frequency
5.1 GHz
-
Efficiency Cores
8
-
Efficiency Core Threads
8
-
Efficiency Core Base Frequency
2.4 GHz
-
Efficiency Core Turbo Frequency
3.9 GHz
12
Total Core Count
16
24
Total Thread Count
24
100 MHz
Bus Frequency
100 MHz
38x
Multiplier
32x
64 K per core
L1 Cache
64 K per core
512 K per core
L2 Cache
14 MB shared
64 MB shared
L3 Cache
30 MB shared
Yes
Unlocked Multiplier
Yes
Memory Parameters
DDR4-3200
Memory Types
DDR5-4800, DDR4-3200
128 GB
Max Memory Size
128 GB
2
Max Memory Channels
2
47.68 GB/s
Max Memory Bandwidth
76.8 GB/s
Yes
ECC Memory Support
Yes
