Xeon E5645 vs Xeon E3-1235L v5
Xeon E5645
Xeon E3-1235L v5
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 E3-1235L v5 is on rank 555, so the Xeon E3-1235L v5 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 E3-1235L v5
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5645 | Xeon E3-1235L v5 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($294) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Skylake-DT (2015) / 14 nm) |
💎 Value Proposition
| Insight | Xeon E5645 | Xeon E3-1235L v5 |
|---|---|---|
| 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 E3-1235L v5
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 E3-1235L v5
The Xeon E3-1235L v5 is manufactured by Intel. It was released in 19 October 2015 (10 years ago). It is based on the Skylake-DT (2015) architecture. It features 4 cores and 4 threads. Base frequency is 2 GHz, with boost up to 3 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 25 Watt. Memory support: DDR4-1866/2133, DDR3L-1333/1600. Passmark benchmark score: 5,013 points. Launch price was $250.
Processing Power
The Xeon E5645 packs 6 cores / 12 threads, while the Xeon E3-1235L v5 offers 4 cores / 4 threads — the Xeon E5645 has 2 more cores. Boost clocks reach 2.67 GHz on the Xeon E5645 versus 3 GHz on the Xeon E3-1235L v5 — a 11.6% clock advantage for the Xeon E3-1235L v5 (base: 2.4 GHz vs 2 GHz). The Xeon E5645 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Xeon E3-1235L v5 uses Skylake-DT (2015) (14 nm). In PassMark, the Xeon E5645 scores 4,942 against the Xeon E3-1235L v5's 5,013 — a 1.4% lead for the Xeon E3-1235L v5. L3 cache: 12 MB (total) on the Xeon E5645 vs 8 MB (total) on the Xeon E3-1235L v5.
| Feature | Xeon E5645 | Xeon E3-1235L v5 |
|---|---|---|
| Cores / Threads | 6 / 12+50% | 4 / 4 |
| Boost Clock | 2.67 GHz | 3 GHz+12% |
| Base Clock | 2.4 GHz+20% | 2 GHz |
| L3 Cache | 12 MB (total)+50% | 8 MB (total) |
| L2 Cache | 256 kB (per core) | 256 kB (per core) |
| Process | 32 nm | 14 nm-56% |
| Architecture | Westmere-EP (2010−2011) | Skylake-DT (2015) |
| PassMark | 4,942 | 5,013+1% |
Memory & Platform
The Xeon E5645 uses the LGA1366 socket (PCIe 5.0), while the Xeon E3-1235L v5 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Xeon E5645 | Xeon E3-1235L v5 |
|---|---|---|
| Socket | LGA1366 | LGA1151 |
| 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 E3-1235L v5). Primary use case: Xeon E5645 targets Server.
| Feature | Xeon E5645 | Xeon E3-1235L v5 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x | — |
| Target Use | Server | — |
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