Phenom II X4 820 vs Pentium 4405U
Phenom II X4 820
Pentium 4405U
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 X4 820 is positioned at rank 916 and the Pentium 4405U is on rank 528, so the Pentium 4405U 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 X4 820
Performance Per Dollar Pentium 4405U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X4 820 | Pentium 4405U |
|---|---|---|
| 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 (Deneb (2009−2011) / 45 nm) | 🛑 Legacy (NetBurst (2000−2006) / 14 nm) |
💎 Value Proposition
| Insight | Phenom II X4 820 | Pentium 4405U |
|---|---|---|
| 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 Phenom II X4 820 and Pentium 4405U
Phenom II X4 820
The Phenom II X4 820 is manufactured by AMD. It was released in 1 September 2009 (16 years ago). It is based on the Deneb (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 4 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: 2,114 points. Launch price was $90.
Pentium 4405U
The Pentium 4405U is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 4 threads. Base frequency is 2.1 GHz, with boost up to 2.1 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,122 points. Launch price was $161.
Processing Power
The Phenom II X4 820 packs 4 cores / 4 threads, while the Pentium 4405U offers 2 cores / 4 threads — the Phenom II X4 820 has 2 more cores. Boost clocks reach 2.8 GHz on the Phenom II X4 820 versus 2.1 GHz on the Pentium 4405U — a 28.6% clock advantage for the Phenom II X4 820 (base: 2.8 GHz vs 2.1 GHz). The Phenom II X4 820 uses the Deneb (2009−2011) architecture (45 nm), while the Pentium 4405U uses NetBurst (2000−2006) (14 nm). In PassMark, the Phenom II X4 820 scores 2,114 against the Pentium 4405U's 2,122 — a 0.4% lead for the Pentium 4405U. L3 cache: 4 MB (total) on the Phenom II X4 820 vs 2 MB on the Pentium 4405U.
| Feature | Phenom II X4 820 | Pentium 4405U |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 4 |
| Boost Clock | 2.8 GHz+33% | 2.1 GHz |
| Base Clock | 2.8 GHz+33% | 2.1 GHz |
| L3 Cache | 4 MB (total)+100% | 2 MB |
| L2 Cache | 512 kB (per core) | 512 kB |
| Process | 45 nm | 14 nm-69% |
| Architecture | Deneb (2009−2011) | NetBurst (2000−2006) |
| PassMark | 2,114 | 2,122 |
Memory & Platform
The Phenom II X4 820 uses the AM3 socket (PCIe 2.0), while the Pentium 4405U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X4 820 | Pentium 4405U |
|---|---|---|
| Socket | AM3 | BGA1356 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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