Phenom II X3 B77 vs Atom N2800
Phenom II X3 B77
Atom N2800
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 Phenom II X3 B77 is positioned at rank 1057 and the Atom N2800 is on rank 147, so the Atom N2800 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Phenom II X3 B77
Performance Per Dollar Atom N2800
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X3 B77 | Atom N2800 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($35) | ✅ More affordable ($3) |
| Longevity | 🛑 Legacy (Heka (2009−2010) / 45 nm) | 🛑 Legacy (Cedarview-M (2011−2012) / 32 nm) |
💎 Value Proposition
| Insight | Phenom II X3 B77 | Atom N2800 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+1057%) |
| Upfront Cost | ⚠️ Higher cost ($35) | ✅ More affordable ($3) |
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 Phenom II X3 B77 and Atom N2800
Phenom II X3 B77
The Phenom II X3 B77 is manufactured by AMD. It was released in 2009-01-01. It is based on the Heka (2009−2010) architecture. It features 3 cores and 3 threads. Base frequency is 3.2 GHz, with boost up to 3.2 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 1,844 points. Launch price was $149.
Atom N2800
The Atom N2800 is manufactured by Intel. It was released in 1 December 2011 (14 years ago). It is based on the Cedarview-M (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): 6.5 Watt. Memory support: DDR3. Passmark benchmark score: 1,829 points. Launch price was $47.
Processing Power
The Phenom II X3 B77 packs 3 cores / 3 threads, while the Atom N2800 offers 2 cores / 4 threads — the Phenom II X3 B77 has 1 more core. Boost clocks reach 3.2 GHz on the Phenom II X3 B77 versus 1.87 GHz on the Atom N2800 — a 52.5% clock advantage for the Phenom II X3 B77 (base: 3.2 GHz vs 1.86 GHz). The Phenom II X3 B77 uses the Heka (2009−2010) architecture (45 nm), while the Atom N2800 uses Cedarview-M (2011−2012) (32 nm). In PassMark, the Phenom II X3 B77 scores 1,844 against the Atom N2800's 1,829 — a 0.8% lead for the Phenom II X3 B77. L3 cache: 6 MB (total) on the Phenom II X3 B77 vs 0 kB on the Atom N2800.
| Feature | Phenom II X3 B77 | Atom N2800 |
|---|---|---|
| Cores / Threads | 3 / 3+50% | 2 / 4 |
| Boost Clock | 3.2 GHz+71% | 1.87 GHz |
| Base Clock | 3.2 GHz+72% | 1.86 GHz |
| L3 Cache | 6 MB (total) | 0 kB |
| L2 Cache | 512 kB (per core) | 512K (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Heka (2009−2010) | Cedarview-M (2011−2012) |
| PassMark | 1,844 | 1,829 |
Memory & Platform
The Phenom II X3 B77 uses the AM3 socket (PCIe 2.0), while the Atom N2800 uses FCBGA559 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3-1333 memory speed. The Phenom II X3 B77 supports up to 32 GB of RAM compared to 4 GB — 155.6% more capacity for professional workloads. Memory channels: 2 (Phenom II X3 B77) vs 1 (Atom N2800). PCIe lanes: 0 (Phenom II X3 B77) vs 4 (Atom N2800) — the Atom N2800 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AM3 (Phenom II X3 B77) and Intel NM10 (Atom N2800).
| Feature | Phenom II X3 B77 | Atom N2800 |
|---|---|---|
| Socket | AM3 | FCBGA559 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3-1333 | DDR3-1066 |
| Max RAM Capacity | 32 GB+700% | 4 GB |
| RAM Channels | 2+100% | 1 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 0 | 4 |
Advanced Features
The Atom N2800 includes integrated graphics (Intel GMA 3650), while the Phenom II X3 B77 requires a dedicated GPU.
| Feature | Phenom II X3 B77 | Atom N2800 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel GMA 3650 |
Value Analysis
The Phenom II X3 B77 launched at $281 MSRP, while the Atom N2800 debuted at $47. At current prices ($35 vs $3), the Atom N2800 is $32 cheaper. In terms of value (PassMark points per dollar), the Phenom II X3 B77 delivers 52.7 pts/$ vs 609.7 pts/$ for the Atom N2800 — making the Atom N2800 the 168.2% better value option.
| Feature | Phenom II X3 B77 | Atom N2800 |
|---|---|---|
| MSRP | $281 | $47-83% |
| Avg Price (30d) | $35 | $3-91% |
| Performance per Dollar | 52.7 | 609.7+1057% |
| Release Date | 2010 | 2011 |
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