Processor comparison
Intel Core i9-12900KF vs AMD Ryzen 9 3900X
Intel
Intel Core i9-12900KF
Intel Socket 1700
3200 MHz
16 cores
Nov 2021
DESKTOP
VS
AMD
AMD Ryzen 9 3900X
AMD Socket AM4
3800 MHz
12 cores
Dec 2019
DESKTOP
Summary
Synthetic performance index
- Intel Core i9-12900KF137%
- AMD Ryzen 9 3900X100%
Relative performance
Single thread performance index
- Intel Core i9-12900KF137%
- AMD Ryzen 9 3900X100%
Relative performance
Reasons to consider the Intel Core i9-12900KF
- Much higher single threaded performance (around 37% higher), makes a noticeable performance difference in gaming and the majority of applications.
- This is a newer product, it might have better application compatibility/performance (check features chart below).
- Around 37% higher average synthetic performance.
Reasons to consider the AMD Ryzen 9 3900X
Gaming
HWSpot recommends the Intel Core i9-12900KF
Based on game and synthetic benchmarks, and theoretical specifications.
Productivity
No clear winner declared
Specifications
Features
| Intel Core i9-12900KF | AMD Ryzen 9 3900X |
|---|
| MMX | | |
| SSE | | |
| SSE2 | | |
| SSE3 | | |
| SSSE3 | | |
| SSE4.2 | | |
| AVX | | |
| AVX2 | | |
| AVX-512 | | |
| FMA3 | | |
| SHA | | |
| EIST | | |
| Intel 64 | | |
| XD bit | | |
| VT-x | | |
| VT-d | | |
| AES-NI | | |
| TSX | | |
| TXT | | |
| CLMUL | | |
| F16C | | |
| BMI1 | | |
| BMI2 | | |
| ABM | | |
| ADX | | |
| RdRand | | |
| TBT 2.0 | | |
| TBT 3.0 | | |
| SSE4A | | |
| SSE4.1 | | |
| AES | | |
| AMD64 | | |
| EVP | | |
| AMD-V | | |
| SMAP | | |
| SMEP | | |
| SMT | | |
| Precision Boost 2 | | |
| XFR 2 | | |
Architecture
| Intel Core i9-12900KF | AMD Ryzen 9 3900X |
|---|
| Architecture | Intel Adler Lake | AMD Zen 2 |
| Market | Desktop | Desktop |
| Memory Support | DDR4-3200 MHz
Dual-channel | DDR4 |
| Codename | Alder Lake | Zen 2 |
| Release Date | Nov 2021 | Dec 2019 |
Cores
| Intel Core i9-12900KF | AMD Ryzen 9 3900X |
|---|
| Cores | 16 | 12 |
| Threads | 24 | 24 |
| E-Cores | 8 | none |
| SMPs | 1 | 1 |
| Integrated Graphics | No | No |
Cache
| Intel Core i9-12900KF | AMD Ryzen 9 3900X |
|---|
| L1 Cache | 64K (per core) | 96K (per core) |
| L2 Cache | 14MB (shared) | 512K (per core) |
| L3 Cache | 30MB (shared) | 64MB |
Physical
| Intel Core i9-12900KF | AMD Ryzen 9 3900X |
|---|
| Socket | Intel Socket 1700 | AMD Socket AM4 |
| Max Case Temp | 72°C | unknown |
| Package | FC-LGA1700 | |
| Die Size | unknown | unknown |
| Process | 10 nm | 7 nm |
Performance
| Intel Core i9-12900KF | AMD Ryzen 9 3900X |
|---|
| Cpu Frequency | 3200 MHz | 3800 MHz |
| Turbo Clock | 5200 MHz | 4600 MHz |
| Base Clock | 100 MHz | 100 MHz |
| E-Core Frequency | 1800 MHz | - |
| E-Core Turbo Clock | 3900 MHz | - |
| Voltage | N/A | variable |
| TDP | 125 W | 125 W |
Raw performance index
Raw single-thread performance estimation
- Intel Core i9-12900KF6240 points
- AMD Ryzen 9 3900X5152 points
Points - higher is better
Raw multi-thread performance estimation
- Intel Core i9-12900KF67584 points
- AMD Ryzen 9 3900X62307 points
Points - higher is better
Synthetic benchmarks
Cinebench R15 CPU Single 64Bit
- Intel Core i9-12900KF284
- AMD Ryzen 9 3900X206
points - higher is better