Ryzen 7 5800X vs Core 2 Duo T6400
Ryzen 7 5800X
Core 2 Duo T6400
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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 2 Duo T6400
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 5800X | Core 2 Duo T6400 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower 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) | 🛑 Legacy (Penryn (2008−2011) / 45 nm) |
💎 Value Proposition
| Insight | Ryzen 7 5800X | Core 2 Duo T6400 |
|---|---|---|
| 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 2 Duo T6400
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 2 Duo T6400
The Core 2 Duo T6400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 2,115 points. Launch price was $249.
Processing Power
The Ryzen 7 5800X packs 8 cores / 16 threads, while the Core 2 Duo T6400 offers 2 cores / 2 threads — the Ryzen 7 5800X has 6 more cores. Boost clocks reach 4.7 GHz on the Ryzen 7 5800X versus 2 GHz on the Core 2 Duo T6400 — a 80.6% clock advantage for the Ryzen 7 5800X (base: 3.8 GHz vs 2 GHz). The Ryzen 7 5800X uses the Vermeer (Zen 3) (2020−2022) architecture (7 nm, 12 nm), while the Core 2 Duo T6400 uses Penryn (2008−2011) (45 nm). In PassMark, the Ryzen 7 5800X scores 27,712 against the Core 2 Duo T6400's 2,115 — a 171.6% lead for the Ryzen 7 5800X. L3 cache: 32 MB on the Ryzen 7 5800X vs 2 MB L2 Cache on the Core 2 Duo T6400.
| Feature | Ryzen 7 5800X | Core 2 Duo T6400 |
|---|---|---|
| Cores / Threads | 8 / 16+300% | 2 / 2 |
| Boost Clock | 4.7 GHz+135% | 2 GHz |
| Base Clock | 3.8 GHz+90% | 2 GHz |
| L3 Cache | 32 MB+1500% | 2 MB L2 Cache |
| L2 Cache | 512K (per core) | 2 MB+300% |
| Process | 7 nm, 12 nm-84% | 45 nm |
| Architecture | Vermeer (Zen 3) (2020−2022) | Penryn (2008−2011) |
| PassMark | 27,712+1210% | 2,115 |
| Geekbench 6 Single | — | 650 |
| Geekbench 6 Multi | — | 1,300 |
Memory & Platform
The Ryzen 7 5800X uses the AM4 socket (PCIe 4.0), while the Core 2 Duo T6400 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 7 5800X versus DDR2-800 on the Core 2 Duo T6400 — the Ryzen 7 5800X supports 66.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 5800X supports up to 128 GB of RAM compared to 8 GB — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 24 (Ryzen 7 5800X) vs 0 (Core 2 Duo T6400) — the Ryzen 7 5800X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 5800X) and Intel GM45,Intel PM45 (Core 2 Duo T6400).
| Feature | Ryzen 7 5800X | Core 2 Duo T6400 |
|---|---|---|
| Socket | AM4 | PGA478 |
| PCIe Generation | PCIe 4.0+264% | PCIe 1.1 |
| Max RAM Speed | DDR4-3200+100% | DDR2-800 |
| Max RAM Capacity | 128 GB+1500% | 8 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 24 | 0 |
Advanced Features
Only the Ryzen 7 5800X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (Ryzen 7 5800X) vs No (Core 2 Duo T6400). Primary use case: Ryzen 7 5800X targets Desktop, Core 2 Duo T6400 targets Mobile.
| Feature | Ryzen 7 5800X | Core 2 Duo T6400 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | No |
| Target Use | Desktop | Mobile |
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