CPU
GPU
Pentium 4405U
Phenom II X4 820
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 Pentium 4405U is positioned at rank 528 and the Phenom II X4 820 is on rank 916, 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 Pentium 4405U
Performance Per Dollar Phenom II X4 820
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium 4405U | Phenom II X4 820 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($50) |
| Longevity | 🛑 Legacy (NetBurst (2000−2006) / 14 nm) | 🛑 Legacy (Deneb (2009−2011) / 45 nm) |
💎 Value Proposition
| Insight | Pentium 4405U | Phenom II X4 820 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($50) |
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 Pentium 4405U and Phenom II X4 820
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.
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.
Processing Power
The Pentium 4405U packs 2 cores / 4 threads, while the Phenom II X4 820 offers 4 cores / 4 threads — the Phenom II X4 820 has 2 more cores. Boost clocks reach 2.1 GHz on the Pentium 4405U versus 2.8 GHz on the Phenom II X4 820 — a 28.6% clock advantage for the Phenom II X4 820 (base: 2.1 GHz vs 2.8 GHz). The Pentium 4405U uses the NetBurst (2000−2006) architecture (14 nm), while the Phenom II X4 820 uses Deneb (2009−2011) (45 nm). In PassMark, the Pentium 4405U scores 2,122 against the Phenom II X4 820's 2,114 — a 0.4% lead for the Pentium 4405U. L3 cache: 2 MB on the Pentium 4405U vs 4 MB (total) on the Phenom II X4 820.
| Feature | Pentium 4405U | Phenom II X4 820 |
|---|---|---|
| Cores / Threads | 2 / 4 | 4 / 4+100% |
| Boost Clock | 2.1 GHz | 2.8 GHz+33% |
| Base Clock | 2.1 GHz | 2.8 GHz+33% |
| L3 Cache | 2 MB | 4 MB (total)+100% |
| L2 Cache | 512 kB | 512 kB (per core) |
| Process | 14 nm-69% | 45 nm |
| Architecture | NetBurst (2000−2006) | Deneb (2009−2011) |
| PassMark | 2,122 | 2,114 |
Memory & Platform
The Pentium 4405U uses the BGA1356 socket (PCIe 3.0), while the Phenom II X4 820 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Pentium 4405U | Phenom II X4 820 |
|---|---|---|
| Socket | BGA1356 | AM3 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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