CPU
GPU
Phenom II X4 840T
Pentium Gold 5405U
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 840T is positioned at rank 265 and the Pentium Gold 5405U is on rank 476, so the Phenom II X4 840T 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 840T
Performance Per Dollar Pentium Gold 5405U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X4 840T | Pentium Gold 5405U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Zosma (2010−2011) / 45 nm) | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) |
💎 Value Proposition
| Insight | Phenom II X4 840T | Pentium Gold 5405U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 840T and Pentium Gold 5405U
Phenom II X4 840T
The Phenom II X4 840T is manufactured by AMD. It was released in 1 September 2010 (15 years ago). It is based on the Zosma (2010−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.9 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: 2,367 points. Launch price was $80.
Pentium Gold 5405U
The Pentium Gold 5405U is manufactured by Intel. It was released in 23 January 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 2 cores and 4 threads. Base frequency is 2.3 GHz, with boost up to 2.3 GHz. L3 cache: 2 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,357 points. Launch price was $161.
Processing Power
The Phenom II X4 840T packs 4 cores / 4 threads, while the Pentium Gold 5405U offers 2 cores / 4 threads — the Phenom II X4 840T has 2 more cores. Boost clocks reach 3.2 GHz on the Phenom II X4 840T versus 2.3 GHz on the Pentium Gold 5405U — a 32.7% clock advantage for the Phenom II X4 840T (base: 2.9 GHz vs 2.3 GHz). The Phenom II X4 840T uses the Zosma (2010−2011) architecture (45 nm), while the Pentium Gold 5405U uses Whiskey Lake-U (2018−2019) (14 nm). In PassMark, the Phenom II X4 840T scores 2,367 against the Pentium Gold 5405U's 2,357 — a 0.4% lead for the Phenom II X4 840T. L3 cache: 6 MB (total) on the Phenom II X4 840T vs 2 MB (total) on the Pentium Gold 5405U.
| Feature | Phenom II X4 840T | Pentium Gold 5405U |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 4 |
| Boost Clock | 3.2 GHz+39% | 2.3 GHz |
| Base Clock | 2.9 GHz+26% | 2.3 GHz |
| L3 Cache | 6 MB (total)+200% | 2 MB (total) |
| L2 Cache | 512 kB (per core)+100% | 256 kB (per core) |
| Process | 45 nm | 14 nm-69% |
| Architecture | Zosma (2010−2011) | Whiskey Lake-U (2018−2019) |
| PassMark | 2,367 | 2,357 |
Memory & Platform
The Phenom II X4 840T uses the AM3 socket (PCIe 2.0), while the Pentium Gold 5405U uses FCBGA1528 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X4 840T | Pentium Gold 5405U |
|---|---|---|
| Socket | AM3 | FCBGA1528 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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