Athlon II X4 645 vs Xeon E5440
Athlon II X4 645
Xeon E5440
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 Athlon II X4 645 is positioned at rank 819 and the Xeon E5440 is on rank 1008, so the Athlon II X4 645 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon II X4 645
Performance Per Dollar Xeon E5440
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II X4 645 | Xeon E5440 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($20) | ⚠️ Higher cost ($37) |
| Longevity | 🛑 Legacy (Propus (2009−2011) / 45 nm) | 🛑 Legacy (Harpertown (2007−2008) / 45 nm) |
💎 Value Proposition
| Insight | Athlon II X4 645 | Xeon E5440 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+86%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($20) | ⚠️ Higher cost ($37) |
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 Athlon II X4 645 and Xeon E5440
Athlon II X4 645
The Athlon II X4 645 is manufactured by AMD. It was released in 21 September 2010 (15 years ago). It is based on the Propus (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 0 kB. 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: 2,375 points. Launch price was $80.
Xeon E5440
The Xeon E5440 is manufactured by Intel. It was released in 11 November 2007 (18 years ago). It is based on the Harpertown (2007−2008) architecture. It features 4 cores and 4 threads. Base frequency is 2.83 GHz, with boost up to 0.83 GHz. L3 cache: 12 MB L2 Cache. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 80 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 2,367 points. Launch price was $690.
Processing Power
Both the Athlon II X4 645 and Xeon E5440 share an identical 4-core/4-thread configuration. Boost clocks reach 3.1 GHz on the Athlon II X4 645 versus 0.83 GHz on the Xeon E5440 — a 115.5% clock advantage for the Athlon II X4 645 (base: 3.1 GHz vs 2.83 GHz). The Athlon II X4 645 uses the Propus (2009−2011) architecture (45 nm), while the Xeon E5440 uses Harpertown (2007−2008) (45 nm). In PassMark, the Athlon II X4 645 scores 2,375 against the Xeon E5440's 2,367 — a 0.3% lead for the Athlon II X4 645. L3 cache: 0 kB on the Athlon II X4 645 vs 12 MB L2 Cache on the Xeon E5440.
| Feature | Athlon II X4 645 | Xeon E5440 |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 4 |
| Boost Clock | 3.1 GHz+273% | 0.83 GHz |
| Base Clock | 3.1 GHz+10% | 2.83 GHz |
| L3 Cache | 0 kB | 12 MB L2 Cache |
| L2 Cache | 512 kB (per core) | 6 MB (total)+1100% |
| Process | 45 nm | 45 nm |
| Architecture | Propus (2009−2011) | Harpertown (2007−2008) |
| PassMark | 2,375 | 2,367 |
| Cinebench R23 Multi | 1,374 | — |
| Geekbench 6 Single | 399 | — |
| Geekbench 6 Multi | 1,374 | — |
Memory & Platform
The Athlon II X4 645 uses the AM3 socket (PCIe 2.0), while the Xeon E5440 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Athlon II X4 645 | Xeon E5440 |
|---|---|---|
| Socket | AM3 | LGA771 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3-1333 | — |
| Max RAM Capacity | 16 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 16 | — |
Advanced Features
Virtualization: Yes (Athlon II X4 645) / not specified (Xeon E5440). Primary use case: Athlon II X4 645 targets Desktop.
| Feature | Athlon II X4 645 | Xeon E5440 |
|---|---|---|
| Integrated GPU | No | — |
| AVX-512 | No | — |
| Virtualization | Yes | — |
| Target Use | Desktop | — |
Value Analysis
The Athlon II X4 645 launched at $126 MSRP, while the Xeon E5440 debuted at $690. At current prices ($20 vs $37), the Athlon II X4 645 is $17 cheaper. In terms of value (PassMark points per dollar), the Athlon II X4 645 delivers 118.8 pts/$ vs 64.0 pts/$ for the Xeon E5440 — making the Athlon II X4 645 the 60% better value option.
| Feature | Athlon II X4 645 | Xeon E5440 |
|---|---|---|
| MSRP | $126-82% | $690 |
| Avg Price (30d) | $20-46% | $37 |
| Performance per Dollar | 118.8+86% | 64.0 |
| Release Date | 2010 | 2007 |
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