CPU Comparison: Intel Core i9-12900KS vs AMD Ryzen 9 3900X

Key Findings

The Intel Core i9-12900KS leads in single-threaded performance by up to 58.2%
In multi-threaded workloads, the Intel Core i9-12900KS shows superior performance with a 34.7% advantage
The AMD Ryzen 9 3900X has the highest core count with 12 cores

Performance Rankings & Market Position

Intel Core i9-12900KS

Desktop

Release Date

Q2 2022

Market Position

183rd fastest in multithreading

4890 CPUs37th fastest in single threading

4890 CPUs51st fastest in

1398 Desktop CPUs

AMD Ryzen 9 3900X

Desktop

Release Date

Q3 2020

Market Position

292nd fastest in multithreading

4890 CPUs637th fastest in single threading

4890 CPUs90th fastest in

1398 Desktop CPUs

Performance

Single-Thread Performance

i9-12900KS

4,344

3900X

2,746

Multi-Thread Performance

i9-12900KS

44,011

3900X

32,666

Specifications: Intel Core i9-12900KS vs AMD Ryzen 9 3900X

💻CPU Model

Intel Core i9-12900KS

i9-12900KS

AMD Ryzen 9 3900X

3900X

🔄Other Names

12th Gen Intel(R) Core(TM) i9-12900KS, 12th Gen Intel Core i9-12900KS

i9-12900KS

AMD Ryzen 9 3900XT 12-Core Processor

3900X

⚡Base Clock

N/A

i9-12900KS

3.8 GHz

3900X

🚀Turbo Clock

N/A

i9-12900KS

4.7 GHz

3900X

💻Cores/Threads

N/A

i9-12900KS

12 Threads: 24

3900X

🔌Socket

LGA 1700

i9-12900KS

AM4

3900X

⚡TDP

150 W

i9-12900KS

105 W

3900X

💾Cache

L1 Instruction Cache: 8 x 32 KBL1 Data Cache: 8 x 48 KBL2 Cache: 8 x 1280 KBL3 Cache: 30 MB

i9-12900KS

L1 Instruction Cache: 12 x 32 KBL1 Data Cache: 12 x 32 KBL2 Cache: 12 x 512 KBL3 Cache: 64 MB

3900X

The Intel Core i9-12900KS and AMD Ryzen 9 3900X compete in the Desktop segment. The Intel Core i9-12900KS shows superior single-thread performance, making it better for tasks like gaming and light workloads.

For multi-threaded applications, the AMD Ryzen 9 3900X takes the lead, despite having the same core count.

Power consumption differs significantly, with the Intel Core i9-12900KS drawing more power under load (150W vs 105W). This may impact system thermal design and power supply requirements.