intel core i9 12900ks vs amd ryzen 9 3900x
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We compared two CPUs Intel Core i9 12900KS (Desktop) 16-cores against AMD Ryzen 9 3900X (Desktop) 12-cores. In this comparison page, we check which of these two processor has better performance in benchmark results, Games, architecture, price and other useful information.
Review
Single-Core Performance
Performance in single-threaded apps and benchmarks
Performance
Measure performance when all cores are involved
Key Differences
Advantages of Intel Core i9 12900KS
- Newer released 3 years later
- Has 4 more physical cores
- Around 25.6 GB/s (33%) higher theoretical memory bandwidth
- 13% higher Turbo Boost frequency (5.3 GHz vs 4.6 GHz)
Advantages of AMD Ryzen 9 3900X
- Consumes up to 17% less energy than the Intel Core i9 12900KS – 125 vs 150 Watt
- Has 34 MB larger L3 cache size
Benchmarks
Cinebench R23 (Single-Core)
Cinebench R23 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
Specifications
General
| Intel Core i9 12900KS | AMD Ryzen 9 3900X | |
| Vendor | Intel | AMD |
| Released | April 5 2022 | July 7 2019 |
| Type | Desktop | Desktop |
| instruction set | x86-64 | x86-64 |
| Codename | Alder Lake-S | Matisse |
| Socket | FCLGA1700 | AM4 |
| Integrated GPU | Intel UHD Graphics 770 | - |
Performance
| Intel Core i9 12900KS | AMD Ryzen 9 3900X | |
| Cores | 16 | 12 |
| Threads | 24 | 24 |
| Base Frequency | 3.4 GHz | 3.8 GHz |
| Turbo Boost Frequency | 5.3 GHz | 4.6 GHz |
| L1 Cache | 80K (per core) | 96K (per core) |
| L2 Cache | 1.25 MB (per core) | 512K (per core) |
| L3 Cache | 30 MB (shared) | 64 MB |
| Unlocked Multiplier | Yes | Yes |
Power
| Intel Core i9 12900KS | AMD Ryzen 9 3900X | |
| Fabrication process | Intel 7 nm | 7 nm |
| Power consumption (TDP) | 150 W | 125 W |
| Max. temperature | 90°C | 95°C |
Memory support
| Intel Core i9 12900KS | AMD Ryzen 9 3900X | |
| Memory types | DDR5-4800, DDR4-3200 | DDR4 Dual-channel |
| Memory Size | 128 GB | 128 GB |
| Max. Memory Channels | 2 | 2 |
| Max. Memory Bandwidth | 76.8 GB/s | 51.196 GB/s |
| ECC Support | Yes | No |
iGPU
| Intel Core i9 12900KS | AMD Ryzen 9 3900X | |
| Integrated Graphics | Intel UHD Graphics 770 | - |
| GPU Base Clock | 300 MHz | MHz |
| GPU Boost Clock | 1.55 MHz | MHz |
| Shading Units | 256 | |
| TMUs | 16 | |
| ROPs | 8 | |
| Execution Units | 32 | |
| TGP | 15 W | W |
iGPU FLOPS
Misc
| Intel Core i9 12900KS | AMD Ryzen 9 3900X | |
| Official site | Intel Core i9 12900KS official page | AMD Ryzen 9 3900X official page |
| PCI Express Version | ||
| PCI Express Lanes | 20 |