CPU
GPU
Core i7-3820QM
Xeon E5649
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 Core i7-3820QM is positioned at rank 1075 and the Xeon E5649 is on rank 938, so the Xeon E5649 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-3820QM
Performance Per Dollar Xeon E5649
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-3820QM | Xeon E5649 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($774) |
| Longevity | 🛑 Legacy (Ivy Bridge (2012−2013) / 22 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Core i7-3820QM | Xeon E5649 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($774) |
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 Core i7-3820QM and Xeon E5649
Core i7-3820QM
The Core i7-3820QM is manufactured by Intel. It was released in 29 April 2012 (13 years ago). It is based on the Ivy Bridge (2012−2013) architecture. It features 4 cores and 8 threads. Base frequency is 2.7 GHz, with boost up to 3.7 GHz. L3 cache: 8 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: PGA988. Thermal design power (TDP): 45 Watt. Memory support: DDR3. Passmark benchmark score: 5,607 points. Launch price was $498.
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.
Processing Power
The Core i7-3820QM packs 4 cores / 8 threads, while the Xeon E5649 offers 6 cores / 12 threads — the Xeon E5649 has 2 more cores. Boost clocks reach 3.7 GHz on the Core i7-3820QM versus 2.93 GHz on the Xeon E5649 — a 23.2% clock advantage for the Core i7-3820QM (base: 2.7 GHz vs 2.53 GHz). The Core i7-3820QM uses the Ivy Bridge (2012−2013) architecture (22 nm), while the Xeon E5649 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Core i7-3820QM scores 5,607 against the Xeon E5649's 5,659 — a 0.9% lead for the Xeon E5649. Geekbench 6 single-core — the metric most relevant to gaming — records 604 vs 415, a 37.1% lead for the Core i7-3820QM that directly translates to higher frame rates. L3 cache: 8 MB (total) on the Core i7-3820QM vs 12288 kB (total) on the Xeon E5649.
| Feature | Core i7-3820QM | Xeon E5649 |
|---|---|---|
| Cores / Threads | 4 / 8 | 6 / 12+50% |
| Boost Clock | 3.7 GHz+26% | 2.93 GHz |
| Base Clock | 2.7 GHz+7% | 2.53 GHz |
| L3 Cache | 8 MB (total) | 12288 kB (total)+50% |
| L2 Cache | 256K (per core) | 256 kB (per core) |
| Process | 22 nm-31% | 32 nm |
| Architecture | Ivy Bridge (2012−2013) | Westmere-EP (2010−2011) |
| PassMark | 5,607 | 5,659 |
| Geekbench 6 Single | 604+46% | 415 |
| Geekbench 6 Multi | — | 2,109 |
Memory & Platform
The Core i7-3820QM uses the PGA988 socket (PCIe 3.0), while the Xeon E5649 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1600 on the Core i7-3820QM versus DDR3 1333 MHz on the Xeon E5649 — the Xeon E5649 supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5649 supports up to 288 GB of RAM compared to 32 GB — 160% more capacity for professional workloads. Memory channels: 2 (Core i7-3820QM) vs 3 (Xeon E5649). PCIe lanes: 16 (Core i7-3820QM) vs 0 (Xeon E5649) — the Core i7-3820QM offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM75,HM76,HM77,QM77,QS77 (Core i7-3820QM) and Intel 5520,Intel X58 (Xeon E5649).
| Feature | Core i7-3820QM | Xeon E5649 |
|---|---|---|
| Socket | PGA988 | LGA1366 |
| PCIe Generation | PCIe 3.0 | PCIe 5.0+67% |
| Max RAM Speed | DDR3-1600 | DDR3 1333 MHz |
| Max RAM Capacity | 32 GB | 288 GB+800% |
| RAM Channels | 2 | 3+50% |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 16 | 0 |
Advanced Features
Neither processor supports overclocking. Virtualization support: VT-x, VT-d, EPT (Core i7-3820QM) vs true (Xeon E5649). The Core i7-3820QM includes integrated graphics (HD Graphics 4000), while the Xeon E5649 requires a dedicated GPU. Primary use case: Core i7-3820QM targets High Performance Laptop, Xeon E5649 targets Server. Direct competitor: Core i7-3820QM rivals A10-4600M.
| Feature | Core i7-3820QM | Xeon E5649 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | HD Graphics 4000 | — |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d, EPT | true |
| Target Use | High Performance Laptop | Server |
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