Xeon E5645 vs Xeon E5-1607 v3
Xeon E5645
Xeon E5-1607 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 E5645 is positioned at rank 669 and the Xeon E5-1607 v3 is on rank 561, so the Xeon E5-1607 v3 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 Xeon E5-1607 v3
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5645 | Xeon E5-1607 v3 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($294) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Haswell-EP (2014−2015) / 22 nm) |
💎 Value Proposition
| Insight | Xeon E5645 | Xeon E5-1607 v3 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($294) | ✅ More affordable ($0) |
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 Xeon E5-1607 v3
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.
Xeon E5-1607 v3
The Xeon E5-1607 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 3.1 GHz, with boost up to 3.1 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: 4,932 points. Launch price was $800.
Processing Power
The Xeon E5645 packs 6 cores / 12 threads, while the Xeon E5-1607 v3 offers 4 cores / 4 threads — the Xeon E5645 has 2 more cores. Boost clocks reach 2.67 GHz on the Xeon E5645 versus 3.1 GHz on the Xeon E5-1607 v3 — a 14.9% clock advantage for the Xeon E5-1607 v3 (base: 2.4 GHz vs 3.1 GHz). The Xeon E5645 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Xeon E5-1607 v3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Xeon E5645 scores 4,942 against the Xeon E5-1607 v3's 4,932 — a 0.2% lead for the Xeon E5645. L3 cache: 12 MB (total) on the Xeon E5645 vs 10 MB (total) on the Xeon E5-1607 v3.
| Feature | Xeon E5645 | Xeon E5-1607 v3 |
|---|---|---|
| Cores / Threads | 6 / 12+50% | 4 / 4 |
| Boost Clock | 2.67 GHz | 3.1 GHz+16% |
| Base Clock | 2.4 GHz | 3.1 GHz+29% |
| 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 | 4,942 | 4,932 |
Memory & Platform
The Xeon E5645 uses the LGA1366 socket (PCIe 5.0), while the Xeon E5-1607 v3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Xeon E5645 | Xeon E5-1607 v3 |
|---|---|---|
| Socket | LGA1366 | LGA2011-3 |
| PCIe Generation | PCIe 5.0+67% | PCIe 3.0 |
| Max RAM Speed | DDR3-1333 | — |
| Max RAM Capacity | 288 GB | — |
| RAM Channels | 3 | — |
| ECC Support | ✅ | — |
| PCIe Lanes | 0 | — |
Advanced Features
Virtualization: VT-x (Xeon E5645) / not specified (Xeon E5-1607 v3). Primary use case: Xeon E5645 targets Server.
| Feature | Xeon E5645 | Xeon E5-1607 v3 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x | — |
| Target Use | Server | — |
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