Athlon 64 FX-55 vs Atom D2550
Athlon 64 FX-55
Atom D2550
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 FX-55 is positioned at rank 1134 and the Atom D2550 is on rank 721, so the Atom D2550 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 FX-55
Performance Per Dollar Atom D2550
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon 64 FX-55 | Atom D2550 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($50) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Clawhammer (2001−2005) / 130 nm) | 🛑 Legacy (Cedarview (2011−2012) / 32 nm) |
💎 Value Proposition
| Insight | Athlon 64 FX-55 | Atom D2550 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($50) | ✅ 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 FX-55 and Atom D2550
Athlon 64 FX-55
The Athlon 64 FX-55 is manufactured by AMD. It was released in 10 October 2004 (21 years ago). It is based on the Clawhammer (2001−2005) architecture. It features 1 cores and 1 threads. Base frequency is 2.6 GHz, with boost up to 2.6 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 130 nm process technology. Socket: 939. Thermal design power (TDP): 104 Watt. Memory support: DDR1 Depends on motherboard. Passmark benchmark score: 690 points. Launch price was $180.
Atom D2550
The Atom D2550 is manufactured by Intel. It was released in 1 November 2011 (14 years ago). It is based on the Cedarview (2011−2012) architecture. It features 2 cores and 4 threads. Base frequency is 1.86 GHz, with boost up to 1.87 GHz. L3 cache: 0 kB. L2 cache: 512K (per core). Built on 32 nm process technology. Socket: FCBGA559. Thermal design power (TDP): 10 Watt. Memory support: DDR3. Passmark benchmark score: 715 points. Launch price was $69.
Processing Power
The Athlon 64 FX-55 packs 1 cores / 1 threads, while the Atom D2550 offers 2 cores / 4 threads — the Atom D2550 has 1 more core. Boost clocks reach 2.6 GHz on the Athlon 64 FX-55 versus 1.87 GHz on the Atom D2550 — a 32.7% clock advantage for the Athlon 64 FX-55 (base: 2.6 GHz vs 1.86 GHz). The Athlon 64 FX-55 uses the Clawhammer (2001−2005) architecture (130 nm), while the Atom D2550 uses Cedarview (2011−2012) (32 nm). In PassMark, the Athlon 64 FX-55 scores 690 against the Atom D2550's 715 — a 3.6% lead for the Atom D2550. Both processors carry 0 kB of L3 cache.
| Feature | Athlon 64 FX-55 | Atom D2550 |
|---|---|---|
| Cores / Threads | 1 / 1 | 2 / 4+100% |
| Boost Clock | 2.6 GHz+39% | 1.87 GHz |
| Base Clock | 2.6 GHz+40% | 1.86 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 1 MB+100% | 512K (per core) |
| Process | 130 nm | 32 nm-75% |
| Architecture | Clawhammer (2001−2005) | Cedarview (2011−2012) |
| PassMark | 690 | 715+4% |
Memory & Platform
The Athlon 64 FX-55 uses the 939 socket (PCIe 1.1), while the Atom D2550 uses FCBGA559 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR1-400 on the Athlon 64 FX-55 versus DDR3-1066 on the Atom D2550 — the Atom D2550 supports 100% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4 GB of RAM. Memory channels: 2 (Athlon 64 FX-55) vs 1 (Atom D2550). PCIe lanes: 0 (Athlon 64 FX-55) vs 4 (Atom D2550) — the Atom D2550 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: nForce3,nForce4,Xpress 200 (Athlon 64 FX-55) and Intel FCBGA559 (Atom D2550).
| Feature | Athlon 64 FX-55 | Atom D2550 |
|---|---|---|
| Socket | 939 | FCBGA559 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR1-400 | DDR3-1066+200% |
| Max RAM Capacity | 4 GB | 4 GB |
| RAM Channels | 2+100% | 1 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 4 |
Advanced Features
The Atom D2550 includes integrated graphics (Intel GMA 3650), while the Athlon 64 FX-55 requires a dedicated GPU.
| Feature | Athlon 64 FX-55 | Atom D2550 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel GMA 3650 |
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