Ryzen 7 5800X vs Core Ultra 7 255U
Ryzen 7 5800X
Core Ultra 7 255U
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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 7 5800X
Performance Per Dollar Core Ultra 7 255U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 5800X | Core Ultra 7 255U |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($180) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Vermeer (Zen 3) (2020−2022) / 7 nm, 12 nm) | ✨ Modern (Arrow Lake-U (2025) / 5 nm) |
💎 Value Proposition
| Insight | Ryzen 7 5800X | Core Ultra 7 255U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($180) | ✅ More affordable ($0) |
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 7 5800X and Core Ultra 7 255U
Ryzen 7 5800X
The Ryzen 7 5800X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen 3) (2020−2022) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 4.7 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 27,712 points. Launch price was $449.
Core Ultra 7 255U
The Core Ultra 7 255U is manufactured by Intel. It was released in 1 January 2025 (less than a year ago). It is based on the Arrow Lake-U (2025) architecture. It features 12 cores and 14 threads. Base frequency is 3.8 GHz, with boost up to 5.2 GHz. L3 cache: 12 MB. Built on 5 nm process technology. Socket: FCBGA2049. Thermal design power (TDP): 14 MB + 12 MB. Memory support: DDR5. Passmark benchmark score: 17,834 points. Launch price was $299.
Processing Power
The Ryzen 7 5800X packs 8 cores / 16 threads, while the Core Ultra 7 255U offers 12 cores / 14 threads — the Core Ultra 7 255U has 4 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 5.2 GHz on the Core Ultra 7 255U — a 10.1% clock advantage for the Core Ultra 7 255U (base: 3.8 GHz vs 3.8 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the Core Ultra 7 255U uses Arrow Lake-U (2025) (5 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the Core Ultra 7 255U's 17,834 — a 43.4% lead for the Ryzen 7 5800X. L3 cache: 32 MB on the Ryzen 7 5800X vs 12 MB on the Core Ultra 7 255U.
| Feature | Ryzen 7 5800X | Core Ultra 7 255U |
|---|---|---|
| Cores / Threads | 8 / 16 | 12 / 14+50% |
| Boost Clock | 4.7 GHz | 5.2 GHz+11% |
| Base Clock | 3.8 GHz | 3.8 GHz |
| L3 Cache | 32 MB+167% | 12 MB |
| L2 Cache | 512K (per core) | — |
| Process | 7 nm, 12 nm | 5 nm-29% |
| Architecture | Vermeer (Zen 3) (2020−2022) | Arrow Lake-U (2025) |
| PassMark | 27,712+55% | 17,834 |
Memory & Platform
The Ryzen 7 5800X uses the AM4 socket (PCIe 4.0), while the Core Ultra 7 255U uses FCBGA2049 (PCIe 5.0) — making them incompatible on the same motherboard.
| Feature | Ryzen 7 5800X | Core Ultra 7 255U |
|---|---|---|
| Socket | AM4 | FCBGA2049 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | DDR4-3200 | — |
| Max RAM Capacity | 128 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ✅ | — |
| PCIe Lanes | 24 | — |
Advanced Features
Virtualization: AMD-V (Ryzen 7 5800X) / not specified (Core Ultra 7 255U). Primary use case: Ryzen 7 5800X targets Desktop.
| Feature | Ryzen 7 5800X | Core Ultra 7 255U |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | Yes | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Desktop | — |
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