Xeon E5649 vs Opteron 6366 HE
Xeon E5649
Opteron 6366 HE
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 E5649 is positioned at rank 938 and the Opteron 6366 HE is on rank 62, so the Opteron 6366 HE offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon E5649
Performance Per Dollar Opteron 6366 HE
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5649 | Opteron 6366 HE |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($774) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Abu Dhabi (2012) / 32 nm) |
💎 Value Proposition
| Insight | Xeon E5649 | Opteron 6366 HE |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($774) | ✅ 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 E5649 and Opteron 6366 HE
Xeon E5649
The Xeon E5649 is manufactured by Intel. It was released in 14 February 2011 (14 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 6 cores and 12 threads. Base frequency is 2.53 GHz, with boost up to 2.93 GHz. L3 cache: 12288 kB (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: 5,659 points. Launch price was $45.
Opteron 6366 HE
The Opteron 6366 HE is manufactured by AMD. It was released in 2015-01-01. It is based on the Abu Dhabi (2012) architecture. It features 16 cores and 16 threads. Base frequency is 1.8 GHz, with boost up to 3.1 GHz. L3 cache: 8 MB (total). L2 cache: 16 MB. Built on 32 nm process technology. Socket: G34. Thermal design power (TDP): 85 Watt. Memory support: DDR3. Passmark benchmark score: 5,613 points. Launch price was $800.
Processing Power
The Xeon E5649 packs 6 cores / 12 threads, while the Opteron 6366 HE offers 16 cores / 16 threads — the Opteron 6366 HE has 10 more cores. Boost clocks reach 2.93 GHz on the Xeon E5649 versus 3.1 GHz on the Opteron 6366 HE — a 5.6% clock advantage for the Opteron 6366 HE (base: 2.53 GHz vs 1.8 GHz). The Xeon E5649 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Opteron 6366 HE uses Abu Dhabi (2012) (32 nm). In PassMark, the Xeon E5649 scores 5,659 against the Opteron 6366 HE's 5,613 — a 0.8% lead for the Xeon E5649. L3 cache: 12288 kB (total) on the Xeon E5649 vs 8 MB (total) on the Opteron 6366 HE.
| Feature | Xeon E5649 | Opteron 6366 HE |
|---|---|---|
| Cores / Threads | 6 / 12 | 16 / 16+167% |
| Boost Clock | 2.93 GHz | 3.1 GHz+6% |
| Base Clock | 2.53 GHz+41% | 1.8 GHz |
| L3 Cache | 12288 kB (total)+50% | 8 MB (total) |
| L2 Cache | 256 kB (per core) | 16 MB+6300% |
| Process | 32 nm | 32 nm |
| Architecture | Westmere-EP (2010−2011) | Abu Dhabi (2012) |
| PassMark | 5,659 | 5,613 |
| Geekbench 6 Single | 415 | — |
| Geekbench 6 Multi | 2,109 | — |
Memory & Platform
The Xeon E5649 uses the LGA1366 socket (PCIe 5.0), while the Opteron 6366 HE uses G34 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Xeon E5649 | Opteron 6366 HE |
|---|---|---|
| Socket | LGA1366 | G34 |
| PCIe Generation | PCIe 5.0+150% | PCIe 2.0 |
| Max RAM Speed | DDR3 1333 MHz | — |
| Max RAM Capacity | 288 GB | — |
| RAM Channels | 3 | — |
| ECC Support | ✅ | — |
| PCIe Lanes | 0 | — |
Advanced Features
Virtualization: true (Xeon E5649) / not specified (Opteron 6366 HE). Primary use case: Xeon E5649 targets Server.
| Feature | Xeon E5649 | Opteron 6366 HE |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | true | — |
| Target Use | Server | — |
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