CPU
GPU
Athlon 64 X2 5800+
Celeron 3965U
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. The Athlon 64 X2 5800+ is positioned at rank 1037 and the Celeron 3965U is on rank 265, so the Celeron 3965U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon 64 X2 5800+
Performance Per Dollar Celeron 3965U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon 64 X2 5800+ | Celeron 3965U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($20) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Brisbane (2007−2008) / 65 nm) | ✨ Modern (Kaby Lake-U (2017) / 14 nm) |
💎 Value Proposition
| Insight | Athlon 64 X2 5800+ | Celeron 3965U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($20) | ✅ 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 Athlon 64 X2 5800+ and Celeron 3965U
Athlon 64 X2 5800+
The Athlon 64 X2 5800+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Brisbane (2007−2008) architecture. It features 2 cores and 2 threads. Max frequency: 3 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 65 nm process technology. Socket: AM2. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 1,745 points. Launch price was $149.
Celeron 3965U
The Celeron 3965U is manufactured by Intel. It was released in 3 January 2017 (8 years ago). It is based on the Kaby Lake-U (2017) architecture. It features 2 cores and 2 threads. Base frequency is 2.2 GHz, with boost up to 2.2 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 1,753 points. Launch price was $107.
Processing Power
Both the Athlon 64 X2 5800+ and Celeron 3965U share an identical 2-core/2-thread configuration. Boost clocks reach 3 GHz on the Athlon 64 X2 5800+ versus 2.2 GHz on the Celeron 3965U — a 30.8% clock advantage for the Athlon 64 X2 5800+. The Athlon 64 X2 5800+ uses the Brisbane (2007−2008) architecture (65 nm), while the Celeron 3965U uses Kaby Lake-U (2017) (14 nm). In PassMark, the Athlon 64 X2 5800+ scores 1,745 against the Celeron 3965U's 1,753 — a 0.5% lead for the Celeron 3965U. L3 cache: 0 kB on the Athlon 64 X2 5800+ vs 2 MB (total) on the Celeron 3965U.
| Feature | Athlon 64 X2 5800+ | Celeron 3965U |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 3 GHz+36% | 2.2 GHz |
| Base Clock | — | 2.2 GHz |
| L3 Cache | 0 kB | 2 MB (total) |
| L2 Cache | 512 kB+100% | 256K (per core) |
| Process | 65 nm | 14 nm-78% |
| Architecture | Brisbane (2007−2008) | Kaby Lake-U (2017) |
| PassMark | 1,745 | 1,753 |
| Geekbench 6 Single | — | 600 |
| Geekbench 6 Multi | — | 1,200 |
Memory & Platform
The Athlon 64 X2 5800+ uses the AM2 socket (PCIe 2.0), while the Celeron 3965U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-800 on the Athlon 64 X2 5800+ versus DDR4-2133 on the Celeron 3965U — the Celeron 3965U supports 66.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 3965U supports up to 32 GB of RAM compared to 16 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Athlon 64 X2 5800+) vs 10 (Celeron 3965U) — the Celeron 3965U offers 10 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD AM2 (Athlon 64 X2 5800+) and SoC (Celeron 3965U).
| Feature | Athlon 64 X2 5800+ | Celeron 3965U |
|---|---|---|
| Socket | AM2 | BGA1356 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | DDR2-800 | DDR4-2133+100% |
| Max RAM Capacity | 16 GB | 32 GB+100% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 10 |
Advanced Features
Virtualization: not specified (Athlon 64 X2 5800+) / VT-x (Celeron 3965U). The Celeron 3965U includes integrated graphics (Intel HD Graphics 610), while the Athlon 64 X2 5800+ requires a dedicated GPU. Primary use case: Celeron 3965U targets Budget Laptop. Direct competitor: Celeron 3965U rivals Pentium Gold 4415U.
| Feature | Athlon 64 X2 5800+ | Celeron 3965U |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel HD Graphics 610 |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x |
| Target Use | — | Budget Laptop |
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