CPU
GPU
Pentium Gold 5405U
Phenom II X4 840T
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 Gold 5405U is positioned at rank 476 and the Phenom II X4 840T is on rank 265, 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 Pentium Gold 5405U
Performance Per Dollar Phenom II X4 840T
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium Gold 5405U | Phenom II X4 840T |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) | 🛑 Legacy (Zosma (2010−2011) / 45 nm) |
💎 Value Proposition
| Insight | Pentium Gold 5405U | Phenom II X4 840T |
|---|---|---|
| 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 Pentium Gold 5405U and Phenom II X4 840T
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.
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.
Processing Power
The Pentium Gold 5405U packs 2 cores / 4 threads, while the Phenom II X4 840T offers 4 cores / 4 threads — the Phenom II X4 840T has 2 more cores. Boost clocks reach 2.3 GHz on the Pentium Gold 5405U versus 3.2 GHz on the Phenom II X4 840T — a 32.7% clock advantage for the Phenom II X4 840T (base: 2.3 GHz vs 2.9 GHz). The Pentium Gold 5405U uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Phenom II X4 840T uses Zosma (2010−2011) (45 nm). In PassMark, the Pentium Gold 5405U scores 2,357 against the Phenom II X4 840T's 2,367 — a 0.4% lead for the Phenom II X4 840T. L3 cache: 2 MB (total) on the Pentium Gold 5405U vs 6 MB (total) on the Phenom II X4 840T.
| Feature | Pentium Gold 5405U | Phenom II X4 840T |
|---|---|---|
| Cores / Threads | 2 / 4 | 4 / 4+100% |
| Boost Clock | 2.3 GHz | 3.2 GHz+39% |
| Base Clock | 2.3 GHz | 2.9 GHz+26% |
| L3 Cache | 2 MB (total) | 6 MB (total)+200% |
| L2 Cache | 256 kB (per core) | 512 kB (per core)+100% |
| Process | 14 nm-69% | 45 nm |
| Architecture | Whiskey Lake-U (2018−2019) | Zosma (2010−2011) |
| PassMark | 2,357 | 2,367 |
Memory & Platform
The Pentium Gold 5405U uses the FCBGA1528 socket (PCIe 3.0), while the Phenom II X4 840T uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Pentium Gold 5405U | Phenom II X4 840T |
|---|---|---|
| Socket | FCBGA1528 | 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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