Xeon X5667 vs Xeon L5640
Xeon X5667
Xeon L5640
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 X5667 is positioned at rank 579 and the Xeon L5640 is on rank 994, so the Xeon X5667 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon X5667
Performance Per Dollar Xeon L5640
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon X5667 | Xeon L5640 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($996) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Xeon X5667 | Xeon L5640 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($996) |
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 X5667 and Xeon L5640
Xeon X5667
The Xeon X5667 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 4 cores and 8 threads. Base frequency is 3.06 GHz, with boost up to 3.46 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 4,697 points. Launch price was $80.
Xeon L5640
The Xeon L5640 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 2.26 GHz, with boost up to 2.8 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 60 Watt. Memory support: DDR3. Passmark benchmark score: 4,659 points. Launch price was $200.
Processing Power
The Xeon X5667 packs 4 cores / 8 threads, while the Xeon L5640 offers 6 cores / 12 threads — the Xeon L5640 has 2 more cores. Boost clocks reach 3.46 GHz on the Xeon X5667 versus 2.8 GHz on the Xeon L5640 — a 21.1% clock advantage for the Xeon X5667 (base: 3.06 GHz vs 2.26 GHz). Both are built on the Westmere-EP (2010−2011) architecture using a 32 nm process. In PassMark, the Xeon X5667 scores 4,697 against the Xeon L5640's 4,659 — a 0.8% lead for the Xeon X5667. Both processors carry 12 MB (total) of L3 cache.
| Feature | Xeon X5667 | Xeon L5640 |
|---|---|---|
| Cores / Threads | 4 / 8 | 6 / 12+50% |
| Boost Clock | 3.46 GHz+24% | 2.8 GHz |
| Base Clock | 3.06 GHz+35% | 2.26 GHz |
| L3 Cache | 12 MB (total) | 12 MB (total) |
| L2 Cache | 256 kB (per core) | 256 kB (per core) |
| Process | 32 nm | 32 nm |
| Architecture | Westmere-EP (2010−2011) | Westmere-EP (2010−2011) |
| PassMark | 4,697 | 4,659 |
Memory & Platform
Both processors use the LGA1366 socket with PCIe 2.0. Maximum memory speed reaches DDR3-1333 on the Xeon X5667 versus DDR3 1333 MHz on the Xeon L5640 — the Xeon L5640 supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both feature 3-channel memory with ECC support. Chipset compatibility: Intel X58,Intel 5520 (Xeon X5667) and Intel 5520,Intel X58 (Xeon L5640).
| Feature | Xeon X5667 | Xeon L5640 |
|---|---|---|
| Socket | LGA1366 | LGA1366 |
| PCIe Generation | PCIe 2.0 | PCIe 5.0+150% |
| Max RAM Speed | DDR3-1333 | DDR3 1333 MHz |
| Max RAM Capacity | — | 288 GB |
| RAM Channels | 3 | 3 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | — | 0 |
Advanced Features
Neither processor supports overclocking. Virtualization support: VT-x, VT-d, EPT (Xeon X5667) vs true (Xeon L5640). Primary use case: Xeon X5667 targets Workstation, Xeon L5640 targets Server Low Power. Direct competitor: Xeon X5667 rivals Core i7-980X.
| Feature | Xeon X5667 | Xeon L5640 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d, EPT | true |
| Target Use | Workstation | Server Low Power |
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