Xeon E5645 vs Core i3-7350K
Xeon E5645
Core i3-7350K
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 i3-7350K is on rank 636, so the Core i3-7350K 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 i3-7350K
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5645 | Core i3-7350K |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($294) | ✅ More affordable ($45) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | ✨ Modern (Kaby Lake (2016−2019) / 14 nm) |
💎 Value Proposition
| Insight | Xeon E5645 | Core i3-7350K |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+546%) |
| Upfront Cost | ⚠️ Higher cost ($294) | ✅ More affordable ($45) |
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 i3-7350K
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 i3-7350K
The Core i3-7350K is manufactured by Intel. It was released in 3 January 2017 (8 years ago). It is based on the Kaby Lake (2016−2019) architecture. It features 2 cores and 4 threads. Base frequency is 4.2 GHz, with boost up to 4.2 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 60 Watt. Memory support: DDR4. Passmark benchmark score: 4,886 points. Launch price was $179.
Processing Power
The Xeon E5645 packs 6 cores / 12 threads, while the Core i3-7350K offers 2 cores / 4 threads — the Xeon E5645 has 4 more cores. Boost clocks reach 2.67 GHz on the Xeon E5645 versus 4.2 GHz on the Core i3-7350K — a 44.5% clock advantage for the Core i3-7350K (base: 2.4 GHz vs 4.2 GHz). The Xeon E5645 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Core i3-7350K uses Kaby Lake (2016−2019) (14 nm). In PassMark, the Xeon E5645 scores 4,942 against the Core i3-7350K's 4,886 — a 1.1% lead for the Xeon E5645. L3 cache: 12 MB (total) on the Xeon E5645 vs 4 MB (total) on the Core i3-7350K.
| Feature | Xeon E5645 | Core i3-7350K |
|---|---|---|
| Cores / Threads | 6 / 12+200% | 2 / 4 |
| Boost Clock | 2.67 GHz | 4.2 GHz+57% |
| Base Clock | 2.4 GHz | 4.2 GHz+75% |
| L3 Cache | 12 MB (total)+200% | 4 MB (total) |
| L2 Cache | 256 kB (per core) | 256K (per core) |
| Process | 32 nm | 14 nm-56% |
| Architecture | Westmere-EP (2010−2011) | Kaby Lake (2016−2019) |
| PassMark | 4,942+1% | 4,886 |
| Cinebench R23 Multi | — | 3,100 |
| Geekbench 6 Single | — | 1,298 |
| Geekbench 6 Multi | — | 2,740 |
Memory & Platform
The Xeon E5645 uses the LGA1366 socket (PCIe 5.0), while the Core i3-7350K uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Xeon E5645 versus DDR4-2400 on the Core i3-7350K — the Core i3-7350K 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 i3-7350K). PCIe lanes: 0 (Xeon E5645) vs 16 (Core i3-7350K) — the Core i3-7350K offers 16 more lanes for additional GPUs or NVMe drives.
| Feature | Xeon E5645 | Core i3-7350K |
|---|---|---|
| Socket | LGA1366 | LGA1151 |
| PCIe Generation | PCIe 5.0+67% | PCIe 3.0 |
| Max RAM Speed | DDR3-1333 | DDR4-2400+33% |
| Max RAM Capacity | 288 GB+350% | 64 GB |
| RAM Channels | 3+50% | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 0 | 16 |
Advanced Features
Virtualization support: VT-x (Xeon E5645) vs true (Core i3-7350K). The Core i3-7350K includes integrated graphics (Intel HD Graphics 630), while the Xeon E5645 requires a dedicated GPU. Primary use case: Xeon E5645 targets Server.
| Feature | Xeon E5645 | Core i3-7350K |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel HD Graphics 630 |
| Unlocked | No | — |
| AVX-512 | No | No |
| Virtualization | VT-x | true |
| Target Use | Server | — |
Value Analysis
The Xeon E5645 launched at $294 MSRP, while the Core i3-7350K debuted at $179.
| Feature | Xeon E5645 | Core i3-7350K |
|---|---|---|
| MSRP | $294 | $179-39% |
| Avg Price (30d) | — | $45 |
| Release Date | 2010 | 2017 |
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