Athlon II X2 280 vs Celeron 3865U
Athlon II X2 280
Celeron 3865U
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 II X2 280 is positioned at rank 638 and the Celeron 3865U is on rank 645, so the Athlon II X2 280 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon II X2 280
Performance Per Dollar Celeron 3865U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II X2 280 | Celeron 3865U |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($15) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Regor (2009−2013) / 45 nm) | ✨ Modern (Kaby Lake-U (2017) / 14 nm) |
💎 Value Proposition
| Insight | Athlon II X2 280 | Celeron 3865U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($15) | ✅ 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 II X2 280 and Celeron 3865U
Athlon II X2 280
The Athlon II X2 280 is manufactured by AMD. It was released in 6 February 2013 (12 years ago). It is based on the Regor (2009−2013) architecture. It features 2 cores and 2 threads. Base frequency is 3.6 GHz, with boost up to 3.6 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 65 Watt. Memory support: DDR2, DDR3. Passmark benchmark score: 1,355 points. Launch price was $100.
Celeron 3865U
The Celeron 3865U 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 1.8 GHz, with boost up to 1.8 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: 1,343 points. Launch price was $107.
Processing Power
Both the Athlon II X2 280 and Celeron 3865U share an identical 2-core/2-thread configuration. Boost clocks reach 3.6 GHz on the Athlon II X2 280 versus 1.8 GHz on the Celeron 3865U — a 66.7% clock advantage for the Athlon II X2 280 (base: 3.6 GHz vs 1.8 GHz). The Athlon II X2 280 uses the Regor (2009−2013) architecture (45 nm), while the Celeron 3865U uses Kaby Lake-U (2017) (14 nm). In PassMark, the Athlon II X2 280 scores 1,355 against the Celeron 3865U's 1,343 — a 0.9% lead for the Athlon II X2 280. Geekbench 6 single-core — the metric most relevant to gaming — records 290 vs 389, a 29.2% lead for the Celeron 3865U that directly translates to higher frame rates. Multi-core Geekbench: 550 vs 674 (20.3% advantage for the Celeron 3865U). L3 cache: 0 kB on the Athlon II X2 280 vs 2 MB (total) on the Celeron 3865U.
| Feature | Athlon II X2 280 | Celeron 3865U |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 3.6 GHz+100% | 1.8 GHz |
| Base Clock | 3.6 GHz+100% | 1.8 GHz |
| L3 Cache | 0 kB | 2 MB (total) |
| L2 Cache | 1 MB+300% | 256K (per core) |
| Process | 45 nm | 14 nm-69% |
| Architecture | Regor (2009−2013) | Kaby Lake-U (2017) |
| PassMark | 1,355 | 1,343 |
| Geekbench 6 Single | 290 | 389+34% |
| Geekbench 6 Multi | 550 | 674+23% |
Memory & Platform
The Athlon II X2 280 uses the AM3 socket (PCIe 2.0), while the Celeron 3865U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Athlon II X2 280 versus DDR4-2133 / LPDDR3-1866 on the Celeron 3865U — the Celeron 3865U supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 3865U 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 II X2 280) vs 10 (Celeron 3865U) — the Celeron 3865U offers 10 more lanes for additional GPUs or NVMe drives. Chipset compatibility: 870,880G,890GX,890FX,970,990X,990FX (Athlon II X2 280) and 100-series,200-series (Celeron 3865U).
| Feature | Athlon II X2 280 | Celeron 3865U |
|---|---|---|
| Socket | AM3 | BGA1356 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | DDR3-1333 | DDR4-2133 / LPDDR3-1866+33% |
| Max RAM Capacity | 16 GB | 32 GB+100% |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 0 | 10 |
Advanced Features
Neither processor supports overclocking. Virtualization support: AMD-V (Athlon II X2 280) vs VT-x / VT-d / EPT (Celeron 3865U). The Celeron 3865U includes integrated graphics (Intel HD Graphics 610), while the Athlon II X2 280 requires a dedicated GPU. Primary use case: Athlon II X2 280 targets Legacy Desktop, Celeron 3865U targets Entry-level. Direct competitor: Athlon II X2 280 rivals Pentium E6700; Celeron 3865U rivals Pentium Gold 4415U.
| Feature | Athlon II X2 280 | Celeron 3865U |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel HD Graphics 610 |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | VT-x / VT-d / EPT |
| Target Use | Legacy Desktop | Entry-level |
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