Ryzen 9 3900X vs Core i9-12900HX
Ryzen 9 3900X
Core i9-12900HX
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 Ryzen 9 3900X
Performance Per Dollar Core i9-12900HX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 3900X | Core i9-12900HX |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($441) | ⚠️ Higher cost ($606) |
| Longevity | ✨ Modern (Matisse (Zen 2) (2019−2020) / 7 nm, 12 nm) | ✨ Modern (Alder Lake-HX (2022) / Intel 7 nm) |
💎 Value Proposition
| Insight | Ryzen 9 3900X | Core i9-12900HX |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+35%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($441) | ⚠️ Higher cost ($606) |
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 Ryzen 9 3900X and Core i9-12900HX
Ryzen 9 3900X
The Ryzen 9 3900X is manufactured by AMD. It was released in 7 July 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 3.8 GHz, with boost up to 4.6 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 125 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 32,517 points. Launch price was $499.
Core i9-12900HX
The Core i9-12900HX is manufactured by Intel. It was released in 10 May 2022 (3 years ago). It is based on the Alder Lake-HX (2022) architecture. It features 16 cores and 24 threads. Base frequency is 2.3 GHz, with boost up to 5 GHz. L3 cache: 30 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1964. Thermal design power (TDP): 55 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 33,018 points. Launch price was $499.
Processing Power
The Ryzen 9 3900X packs 12 cores / 24 threads, while the Core i9-12900HX offers 16 cores / 24 threads — the Core i9-12900HX has 4 more cores. Boost clocks reach 4.6 GHz on the Ryzen 9 3900X versus 5 GHz on the Core i9-12900HX — a 8.3% clock advantage for the Core i9-12900HX (base: 3.8 GHz vs 2.3 GHz). The Ryzen 9 3900X uses the Matisse (Zen 2) (2019−2020) architecture (7 nm, 12 nm), while the Core i9-12900HX uses Alder Lake-HX (2022) (Intel 7 nm). In PassMark, the Ryzen 9 3900X scores 32,517 against the Core i9-12900HX's 33,018 — a 1.5% lead for the Core i9-12900HX. Geekbench 6 single-core — the metric most relevant to gaming — records 1,300 vs 2,426, a 60.4% lead for the Core i9-12900HX that directly translates to higher frame rates. Multi-core Geekbench: 12,000 vs 14,620 (19.7% advantage for the Core i9-12900HX). L3 cache: 64 MB on the Ryzen 9 3900X vs 30 MB (total) on the Core i9-12900HX.
| Feature | Ryzen 9 3900X | Core i9-12900HX |
|---|---|---|
| Cores / Threads | 12 / 24 | 16 / 24+33% |
| Boost Clock | 4.6 GHz | 5 GHz+9% |
| Base Clock | 3.8 GHz+65% | 2.3 GHz |
| L3 Cache | 64 MB+113% | 30 MB (total) |
| L2 Cache | 512K (per core) | 1.25 MB (per core)+150% |
| Process | 7 nm, 12 nm | Intel 7 nm |
| Architecture | Matisse (Zen 2) (2019−2020) | Alder Lake-HX (2022) |
| PassMark | 32,517 | 33,018+2% |
| Cinebench R23 Multi | — | 23,150 |
| Geekbench 6 Single | 1,300 | 2,426+87% |
| Geekbench 6 Multi | 12,000 | 14,620+22% |
Memory & Platform
The Ryzen 9 3900X uses the AM4 socket (PCIe 4.0), while the Core i9-12900HX uses FCBGA1964 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 3900X versus DDR5-4800, DDR4-3200 on the Core i9-12900HX — the Core i9-12900HX supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 9 3900X) vs 48 (Core i9-12900HX) — the Core i9-12900HX offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X570,B550 (Ryzen 9 3900X) and HM670,WM690 (Core i9-12900HX).
| Feature | Ryzen 9 3900X | Core i9-12900HX |
|---|---|---|
| Socket | AM4 | FCBGA1964 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | DDR4-3200 | DDR5-4800, DDR4-3200+25% |
| Max RAM Capacity | 128 GB | 128 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 24 | 48+100% |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Virtualization support: AMD-V (Ryzen 9 3900X) vs VT-x, VT-d, EPT (Core i9-12900HX). The Core i9-12900HX includes integrated graphics (UHD Graphics 770), while the Ryzen 9 3900X requires a dedicated GPU. Primary use case: Ryzen 9 3900X targets Workstation, Core i9-12900HX targets High-end Mobile Performance. Direct competitor: Core i9-12900HX rivals Ryzen 9 6900HX.
| Feature | Ryzen 9 3900X | Core i9-12900HX |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | UHD Graphics 770 |
| Unlocked | Yes | Yes |
| AVX-512 | No | No |
| Virtualization | AMD-V | VT-x, VT-d, EPT |
| Target Use | Workstation | High-end Mobile Performance |
Value Analysis
The Ryzen 9 3900X launched at $499 MSRP, while the Core i9-12900HX debuted at $606.
| Feature | Ryzen 9 3900X | Core i9-12900HX |
|---|---|---|
| MSRP | $499-18% | $606 |
| Avg Price (30d) | $441 | — |
| Release Date | 2019 | 2022 |
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