CPU
GPU
Xeon E5620
Athlon II X4 651
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 E5620 is positioned at rank 649 and the Athlon II X4 651 is on rank 505, 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 Xeon E5620
Performance Per Dollar Athlon II X4 651
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5620 | Athlon II X4 651 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($92) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | 🛑 Legacy (Llano (2011−2012) / 32 nm) |
💎 Value Proposition
| Insight | Xeon E5620 | Athlon II X4 651 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($92) |
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 E5620 and Athlon II X4 651
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.
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.
Processing Power
The Xeon E5620 packs 4 cores / 8 threads, matching the Athlon II X4 651's 4 cores. Boost clocks reach 2.66 GHz on the Xeon E5620 versus 3 GHz on the Athlon II X4 651 — a 12% clock advantage for the Athlon II X4 651 (base: 2.4 GHz vs 3 GHz). The Xeon E5620 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Athlon II X4 651 uses Llano (2011−2012) (32 nm). In PassMark, the Xeon E5620 scores 3,621 against the Athlon II X4 651's 3,584 — a 1% lead for the Xeon E5620. L3 cache: 12 MB (total) on the Xeon E5620 vs 0 kB on the Athlon II X4 651.
| Feature | Xeon E5620 | Athlon II X4 651 |
|---|---|---|
| Cores / Threads | 4 / 8 | 4 / 4 |
| Boost Clock | 2.66 GHz | 3 GHz+13% |
| Base Clock | 2.4 GHz | 3 GHz+25% |
| L3 Cache | 12 MB (total) | 0 kB |
| L2 Cache | 256 kB (per core) | 1 MB (per core)+300% |
| Process | 32 nm | 32 nm |
| Architecture | Westmere-EP (2010−2011) | Llano (2011−2012) |
| PassMark | 3,621+1% | 3,584 |
Memory & Platform
The Xeon E5620 uses the LGA1366 socket (PCIe 2.0), while the Athlon II X4 651 uses FM1 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Xeon E5620 | Athlon II X4 651 |
|---|---|---|
| Socket | LGA1366 | FM1 |
| 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 |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Xeon E5620 and Athlon II X4 651
