CPU
GPU
Athlon II X4 651
Xeon E5620
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 Athlon II X4 651 is positioned at rank 505 and the Xeon E5620 is on rank 649, so the Athlon II X4 651 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon II X4 651
Performance Per Dollar Xeon E5620
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II X4 651 | Xeon E5620 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($92) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Llano (2011−2012) / 32 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Athlon II X4 651 | Xeon E5620 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($92) | ✅ 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 Athlon II X4 651 and Xeon E5620
Athlon II X4 651
The Athlon II X4 651 is manufactured by AMD. It was released in 2009-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 100 Watt. Memory support: DDR3. Passmark benchmark score: 3,584 points. Launch price was $149.
Xeon E5620
The Xeon E5620 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 2.4 GHz, with boost up to 2.66 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: 3,621 points. Launch price was $35.
Processing Power
The Athlon II X4 651 packs 4 cores / 4 threads, matching the Xeon E5620's 4 cores. Boost clocks reach 3 GHz on the Athlon II X4 651 versus 2.66 GHz on the Xeon E5620 — a 12% clock advantage for the Athlon II X4 651 (base: 3 GHz vs 2.4 GHz). The Athlon II X4 651 uses the Llano (2011−2012) architecture (32 nm), while the Xeon E5620 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Athlon II X4 651 scores 3,584 against the Xeon E5620's 3,621 — a 1% lead for the Xeon E5620. L3 cache: 0 kB on the Athlon II X4 651 vs 12 MB (total) on the Xeon E5620.
| Feature | Athlon II X4 651 | Xeon E5620 |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 8 |
| Boost Clock | 3 GHz+13% | 2.66 GHz |
| Base Clock | 3 GHz+25% | 2.4 GHz |
| L3 Cache | 0 kB | 12 MB (total) |
| L2 Cache | 1 MB (per core)+300% | 256 kB (per core) |
| Process | 32 nm | 32 nm |
| Architecture | Llano (2011−2012) | Westmere-EP (2010−2011) |
| PassMark | 3,584 | 3,621+1% |
Memory & Platform
The Athlon II X4 651 uses the FM1 socket (PCIe 2.0), while the Xeon E5620 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Athlon II X4 651 | Xeon E5620 |
|---|---|---|
| Socket | FM1 | LGA1366 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3-1866 | — |
| Max RAM Capacity | 16 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 16 | — |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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