Core i7-12700K vs Ryzen 9 3900
Core i7-12700K
Ryzen 9 3900
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-12700K
Performance Per Dollar Ryzen 9 3900
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-12700K | Ryzen 9 3900 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($285) | ✅ More affordable ($150) |
| Longevity | ✨ Modern (Alder Lake, Golden Cove, Gracemont (2021) / 10 nm) | ✨ Modern (Matisse (Zen 2) (2019−2020) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Core i7-12700K | Ryzen 9 3900 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+69%) |
| Upfront Cost | ⚠️ Higher cost ($285) | ✅ More affordable ($150) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Core i7-12700K and Ryzen 9 3900
Core i7-12700K
The Core i7-12700K is manufactured by Intel. It was released in 4 November 2021 (4 years ago). It is based on the Alder Lake, Golden Cove, Gracemont (2021) architecture. It features 12 cores and 20 threads. Base frequency is 3.6 GHz, with boost up to 5 GHz. L3 cache: 25 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm process technology. Socket: LGA1700. Thermal design power (TDP): 125 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 34,347 points. Launch price was $409.
Ryzen 9 3900
The Ryzen 9 3900 is manufactured by AMD. It was released in 24 September 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 12 cores and 24 threads. Base frequency is 3.1 GHz, with boost up to 4.3 GHz. L3 cache: 64 MB. L2 cache: 512 kB (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4-3200. Passmark benchmark score: 30,588 points. Launch price was $499.
Processing Power
The Core i7-12700K packs 12 cores / 20 threads, matching the Ryzen 9 3900's 12 cores. Boost clocks reach 5 GHz on the Core i7-12700K versus 4.3 GHz on the Ryzen 9 3900 — a 15.1% clock advantage for the Core i7-12700K (base: 3.6 GHz vs 3.1 GHz). The Core i7-12700K uses the Alder Lake, Golden Cove, Gracemont (2021) architecture (10 nm), while the Ryzen 9 3900 uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Core i7-12700K scores 34,347 against the Ryzen 9 3900's 30,588 — a 11.6% lead for the Core i7-12700K. L3 cache: 25 MB (total) on the Core i7-12700K vs 64 MB on the Ryzen 9 3900.
| Feature | Core i7-12700K | Ryzen 9 3900 |
|---|---|---|
| Cores / Threads | 12 / 20 | 12 / 24 |
| Boost Clock | 5 GHz+16% | 4.3 GHz |
| Base Clock | 3.6 GHz+16% | 3.1 GHz |
| L3 Cache | 25 MB (total) | 64 MB+156% |
| L2 Cache | 1.25 MB (per core)+150% | 512 kB (per core) |
| Process | 10 nm | 7 nm, 12 nm-30% |
| Architecture | Alder Lake, Golden Cove, Gracemont (2021) | Matisse (Zen 2) (2019−2020) |
| PassMark | 34,347+12% | 30,588 |
| Cinebench R23 Multi | — | 17,700 |
| Geekbench 6 Single | — | 1,713 |
| Geekbench 6 Multi | — | 10,983 |
Memory & Platform
The Core i7-12700K uses the LGA1700 socket (PCIe 5.0), while the Ryzen 9 3900 uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 4800 on the Core i7-12700K versus DDR4-3200 on the Ryzen 9 3900 — the Core i7-12700K supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (Core i7-12700K) vs 24 (Ryzen 9 3900) — the Ryzen 9 3900 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Z690,B660 (Core i7-12700K) and X570,B550,X470,B450 (Ryzen 9 3900).
| Feature | Core i7-12700K | Ryzen 9 3900 |
|---|---|---|
| Socket | LGA1700 | AM4 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | 4800+119900% | DDR4-3200 |
| Max RAM Capacity | 128 | 128 GB+104857500% |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 20 | 24+20% |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Virtualization support: VT-x, VT-d (Core i7-12700K) vs AMD-V (Ryzen 9 3900). The Core i7-12700K includes integrated graphics (Intel UHD Graphics 770), while the Ryzen 9 3900 requires a dedicated GPU. Primary use case: Ryzen 9 3900 targets Workstation Desktop (low power). Direct competitor: Core i7-12700K rivals Ryzen 7 5800X; Ryzen 9 3900 rivals Core i9-9900.
| Feature | Core i7-12700K | Ryzen 9 3900 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Intel UHD Graphics 770 | — |
| Unlocked | Yes | Yes |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d | AMD-V |
| Target Use | — | Workstation Desktop (low power) |
Value Analysis
The Core i7-12700K launched at $409 MSRP, while the Ryzen 9 3900 debuted at $499. At current prices ($285 vs $150), the Ryzen 9 3900 is $135 cheaper. In terms of value (PassMark points per dollar), the Core i7-12700K delivers 120.5 pts/$ vs 203.9 pts/$ for the Ryzen 9 3900 — making the Ryzen 9 3900 the 51.4% better value option.
| Feature | Core i7-12700K | Ryzen 9 3900 |
|---|---|---|
| MSRP | $409-18% | $499 |
| Avg Price (30d) | $285 | $150-47% |
| Performance per Dollar | 120.5 | 203.9+69% |
| Release Date | 2021 | 2019 |
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