Phenom II X3 P840 vs Xeon X5647
Phenom II X3 P840
Xeon X5647
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 X3 P840 is positioned at rank 45 and the Xeon X5647 is on rank 593, so the Phenom II X3 P840 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 X3 P840
Performance Per Dollar Xeon X5647
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X3 P840 | Xeon X5647 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Champlain (2010−2011) / 45 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Phenom II X3 P840 | Xeon X5647 |
|---|---|---|
| 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 X3 P840 and Xeon X5647
Phenom II X3 P840
The Phenom II X3 P840 is manufactured by AMD. It was released in 2009-01-01. It is based on the Champlain (2010−2011) architecture. It features 3 cores and 3 threads. Max frequency: 1.9 GHz. L2 cache: 1.5 MB. Built on 45 nm process technology. Socket: S1. Thermal design power (TDP): 1.5 MB. Memory support: DDR3. Passmark benchmark score: 4,425 points. Launch price was $149.
Xeon X5647
The Xeon X5647 is manufactured by Intel. It was released in 14 February 2011 (14 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 4 cores and 8 threads. Base frequency is 2.93 GHz, with boost up to 3.2 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 4,441 points. Launch price was $175.
Processing Power
The Phenom II X3 P840 packs 3 cores / 3 threads, while the Xeon X5647 offers 4 cores / 8 threads — the Xeon X5647 has 1 more core. Boost clocks reach 1.9 GHz on the Phenom II X3 P840 versus 3.2 GHz on the Xeon X5647 — a 51% clock advantage for the Xeon X5647. The Phenom II X3 P840 uses the Champlain (2010−2011) architecture (45 nm), while the Xeon X5647 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Phenom II X3 P840 scores 4,425 against the Xeon X5647's 4,441 — a 0.4% lead for the Xeon X5647.
| Feature | Phenom II X3 P840 | Xeon X5647 |
|---|---|---|
| Cores / Threads | 3 / 3 | 4 / 8+33% |
| Boost Clock | 1.9 GHz | 3.2 GHz+68% |
| Base Clock | — | 2.93 GHz |
| L3 Cache | — | 12 MB (total) |
| L2 Cache | 1.5 MB+500% | 256 kB (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Champlain (2010−2011) | Westmere-EP (2010−2011) |
| PassMark | 4,425 | 4,441 |
Memory & Platform
The Phenom II X3 P840 uses the S1 socket (PCIe 2.0), while the Xeon X5647 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X3 P840 | Xeon X5647 |
|---|---|---|
| Socket | S1 | LGA1366 |
| PCIe Generation | PCIe 2.0 | PCIe 5.0+150% |
| Max RAM Speed | — | DDR3-1066 |
| RAM Channels | — | 3 |
| ECC Support | — | ✅ |
Advanced Features
Virtualization: not specified (Phenom II X3 P840) / VT-x, VT-d (Xeon X5647). Primary use case: Xeon X5647 targets Workstation. Direct competitor: Xeon X5647 rivals Core i7-980X.
| Feature | Phenom II X3 P840 | Xeon X5647 |
|---|---|---|
| Integrated GPU | — | No |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x, VT-d |
| Target Use | — | Workstation |
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