Phenom II X4 840T vs Core i5-661
Phenom II X4 840T
Core i5-661
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 Core i5-661 is on rank 959, 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 Core i5-661
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X4 840T | Core i5-661 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($40) |
| Longevity | 🛑 Legacy (Zosma (2010−2011) / 45 nm) | 🛑 Legacy (Clarkdale (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Phenom II X4 840T | Core i5-661 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($40) |
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 Core i5-661
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.
Core i5-661
The Core i5-661 is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Clarkdale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 3.33 GHz, with boost up to 3.6 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1156. Thermal design power (TDP): 87 Watt. Memory support: DDR3. Passmark benchmark score: 2,387 points. Launch price was $252.
Processing Power
The Phenom II X4 840T packs 4 cores / 4 threads, while the Core i5-661 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 3.6 GHz on the Core i5-661 — a 11.8% clock advantage for the Core i5-661 (base: 2.9 GHz vs 3.33 GHz). The Phenom II X4 840T uses the Zosma (2010−2011) architecture (45 nm), while the Core i5-661 uses Clarkdale (2010−2011) (32 nm). In PassMark, the Phenom II X4 840T scores 2,367 against the Core i5-661's 2,387 — a 0.8% lead for the Core i5-661. L3 cache: 6 MB (total) on the Phenom II X4 840T vs 4 MB (total) on the Core i5-661.
| Feature | Phenom II X4 840T | Core i5-661 |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 4 |
| Boost Clock | 3.2 GHz | 3.6 GHz+12% |
| Base Clock | 2.9 GHz | 3.33 GHz+15% |
| L3 Cache | 6 MB (total)+50% | 4 MB (total) |
| L2 Cache | 512 kB (per core)+100% | 256 kB (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Zosma (2010−2011) | Clarkdale (2010−2011) |
| PassMark | 2,367 | 2,387 |
Memory & Platform
The Phenom II X4 840T uses the AM3 socket (PCIe 2.0), while the Core i5-661 uses LGA1156 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X4 840T | Core i5-661 |
|---|---|---|
| Socket | AM3 | LGA1156 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
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