Xeon E5645 vs Core i5-6440HQ
Xeon E5645
Core i5-6440HQ
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 E5645 is positioned at rank 669 and the Core i5-6440HQ is on rank 879, so the Xeon E5645 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon E5645
Performance Per Dollar Core i5-6440HQ
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5645 | Core i5-6440HQ |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($294) | ✅ More affordable ($250) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Skylake (2015−2016) / 14 nm) |
💎 Value Proposition
| Insight | Xeon E5645 | Core i5-6440HQ |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+19%) |
| Upfront Cost | ⚠️ Higher cost ($294) | ✅ More affordable ($250) |
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 E5645 and Core i5-6440HQ
Xeon E5645
The Xeon E5645 is manufactured by Intel. It was released in 16 March 2010 (15 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 6 cores and 12 threads. Base frequency is 2.4 GHz, with boost up to 2.67 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 4,942 points. Launch price was $294.
Core i5-6440HQ
The Core i5-6440HQ is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 4 cores and 4 threads. Base frequency is 2.6 GHz, with boost up to 3.5 GHz. L3 cache: 6 MB. L2 cache: 1 MB. Built on 14 nm process technology. Socket: BGA1440. Thermal design power (TDP): 45 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 5,021 points. Launch price was $250.
Processing Power
The Xeon E5645 packs 6 cores / 12 threads, while the Core i5-6440HQ offers 4 cores / 4 threads — the Xeon E5645 has 2 more cores. Boost clocks reach 2.67 GHz on the Xeon E5645 versus 3.5 GHz on the Core i5-6440HQ — a 26.9% clock advantage for the Core i5-6440HQ (base: 2.4 GHz vs 2.6 GHz). The Xeon E5645 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Core i5-6440HQ uses Skylake (2015−2016) (14 nm). In PassMark, the Xeon E5645 scores 4,942 against the Core i5-6440HQ's 5,021 — a 1.6% lead for the Core i5-6440HQ. L3 cache: 12 MB (total) on the Xeon E5645 vs 6 MB on the Core i5-6440HQ.
| Feature | Xeon E5645 | Core i5-6440HQ |
|---|---|---|
| Cores / Threads | 6 / 12+50% | 4 / 4 |
| Boost Clock | 2.67 GHz | 3.5 GHz+31% |
| Base Clock | 2.4 GHz | 2.6 GHz+8% |
| L3 Cache | 12 MB (total)+100% | 6 MB |
| L2 Cache | 256 kB (per core) | 1 MB+300% |
| Process | 32 nm | 14 nm-56% |
| Architecture | Westmere-EP (2010−2011) | Skylake (2015−2016) |
| PassMark | 4,942 | 5,021+2% |
Memory & Platform
The Xeon E5645 uses the LGA1366 socket (PCIe 5.0), while the Core i5-6440HQ uses BGA1440 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Xeon E5645 versus DDR4-2133 on the Core i5-6440HQ — the Core i5-6440HQ supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5645 supports up to 288 GB of RAM compared to 64 GB — 127.3% more capacity for professional workloads. Memory channels: 3 (Xeon E5645) vs 2 (Core i5-6440HQ). PCIe lanes: 0 (Xeon E5645) vs 16 (Core i5-6440HQ) — the Core i5-6440HQ offers 16 more lanes for additional GPUs or NVMe drives.
| Feature | Xeon E5645 | Core i5-6440HQ |
|---|---|---|
| Socket | LGA1366 | BGA1440 |
| PCIe Generation | PCIe 5.0+67% | PCIe 3.0 |
| Max RAM Speed | DDR3-1333 | DDR4-2133+33% |
| Max RAM Capacity | 288 GB+350% | 64 GB |
| RAM Channels | 3+50% | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 0 | 16 |
Advanced Features
Neither processor supports overclocking. Virtualization support: VT-x (Xeon E5645) vs VT-x, VT-d (Core i5-6440HQ). The Core i5-6440HQ includes integrated graphics (HD Graphics 530), while the Xeon E5645 requires a dedicated GPU. Primary use case: Xeon E5645 targets Server, Core i5-6440HQ targets Mobile.
| Feature | Xeon E5645 | Core i5-6440HQ |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | HD Graphics 530 |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x | VT-x, VT-d |
| Target Use | Server | Mobile |
Value Analysis
The Xeon E5645 launched at $294 MSRP, while the Core i5-6440HQ debuted at $250.
| Feature | Xeon E5645 | Core i5-6440HQ |
|---|---|---|
| MSRP | $294 | $250-15% |
| Release Date | 2010 | 2015 |
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