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