CPU
GPU
Xeon X5647
Xeon E5-1603 v3
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 Xeon X5647 is positioned at rank 593 and the Xeon E5-1603 v3 is on rank 683, so the Xeon X5647 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon X5647
Performance Per Dollar Xeon E5-1603 v3
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon X5647 | Xeon E5-1603 v3 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($40) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Haswell-EP (2014−2015) / 22 nm) |
💎 Value Proposition
| Insight | Xeon X5647 | Xeon E5-1603 v3 |
|---|---|---|
| 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 Xeon X5647 and Xeon E5-1603 v3
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.
Xeon E5-1603 v3
The Xeon E5-1603 v3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 4 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 10 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 140 Watt. Memory support: DDR4-1333, DDR4-1600, DDR4-1866. Passmark benchmark score: 4,460 points. Launch price was $800.
Processing Power
The Xeon X5647 packs 4 cores / 8 threads, matching the Xeon E5-1603 v3's 4 cores. Boost clocks reach 3.2 GHz on the Xeon X5647 versus 2.8 GHz on the Xeon E5-1603 v3 — a 13.3% clock advantage for the Xeon X5647 (base: 2.93 GHz vs 2.8 GHz). The Xeon X5647 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Xeon E5-1603 v3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Xeon X5647 scores 4,441 against the Xeon E5-1603 v3's 4,460 — a 0.4% lead for the Xeon E5-1603 v3. L3 cache: 12 MB (total) on the Xeon X5647 vs 10 MB (total) on the Xeon E5-1603 v3.
| Feature | Xeon X5647 | Xeon E5-1603 v3 |
|---|---|---|
| Cores / Threads | 4 / 8 | 4 / 4 |
| Boost Clock | 3.2 GHz+14% | 2.8 GHz |
| Base Clock | 2.93 GHz+5% | 2.8 GHz |
| L3 Cache | 12 MB (total)+20% | 10 MB (total) |
| L2 Cache | 256 kB (per core) | 256K (per core) |
| Process | 32 nm | 22 nm-31% |
| Architecture | Westmere-EP (2010−2011) | Haswell-EP (2014−2015) |
| PassMark | 4,441 | 4,460 |
Memory & Platform
The Xeon X5647 uses the LGA1366 socket (PCIe 5.0), while the Xeon E5-1603 v3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Xeon X5647 | Xeon E5-1603 v3 |
|---|---|---|
| Socket | LGA1366 | LGA2011-3 |
| PCIe Generation | PCIe 5.0+67% | PCIe 3.0 |
| Max RAM Speed | DDR3-1066 | — |
| RAM Channels | 3 | — |
| ECC Support | ✅ | — |
Advanced Features
Virtualization: VT-x, VT-d (Xeon X5647) / not specified (Xeon E5-1603 v3). Primary use case: Xeon X5647 targets Workstation. Direct competitor: Xeon X5647 rivals Core i7-980X.
| Feature | Xeon X5647 | Xeon E5-1603 v3 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d | — |
| Target Use | Workstation | — |
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