CPU
GPU
Xeon E5-2643
Atom x7405C
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 E5-2643 is positioned at rank 1009 and the Atom x7405C is on rank 180, so the Atom x7405C offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon E5-2643
Performance Per Dollar Atom x7405C
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5-2643 | Atom x7405C |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($50) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Sandy Bridge-EP (2012) / 32 nm) | ✨ Modern (Amston Lake (2024−2025) / 10 nm) |
💎 Value Proposition
| Insight | Xeon E5-2643 | Atom x7405C |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($50) | ✅ 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 E5-2643 and Atom x7405C
Xeon E5-2643
The Xeon E5-2643 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-EP (2012) architecture. It features 4 cores and 8 threads. Base frequency is 3.3 GHz, with boost up to 3.5 GHz. L3 cache: 10240 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 5,228 points. Launch price was $218.
Atom x7405C
The Atom x7405C is manufactured by Intel. It was released in 8 April 2024 (1 year ago). It is based on the Amston Lake (2024−2025) architecture. It features 4 cores and 4 threads. Base frequency is 1.7 GHz, with boost up to 3.4 GHz. L3 cache: 6 MB (total). L2 cache: 2 MB (total). Built on 10 nm process technology. Socket: FCBGA1264. Thermal design power (TDP): 12 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 5,218 points. Launch price was $57.
Processing Power
The Xeon E5-2643 packs 4 cores / 8 threads, matching the Atom x7405C's 4 cores. Boost clocks reach 3.5 GHz on the Xeon E5-2643 versus 3.4 GHz on the Atom x7405C — a 2.9% clock advantage for the Xeon E5-2643 (base: 3.3 GHz vs 1.7 GHz). The Xeon E5-2643 uses the Sandy Bridge-EP (2012) architecture (32 nm), while the Atom x7405C uses Amston Lake (2024−2025) (10 nm). In PassMark, the Xeon E5-2643 scores 5,228 against the Atom x7405C's 5,218 — a 0.2% lead for the Xeon E5-2643. L3 cache: 10240 kB (total) on the Xeon E5-2643 vs 6 MB (total) on the Atom x7405C.
| Feature | Xeon E5-2643 | Atom x7405C |
|---|---|---|
| Cores / Threads | 4 / 8 | 4 / 4 |
| Boost Clock | 3.5 GHz+3% | 3.4 GHz |
| Base Clock | 3.3 GHz+94% | 1.7 GHz |
| L3 Cache | 10240 kB (total)+67% | 6 MB (total) |
| L2 Cache | 256 kB (per core) | 2 MB (total)+700% |
| Process | 32 nm | 10 nm-69% |
| Architecture | Sandy Bridge-EP (2012) | Amston Lake (2024−2025) |
| PassMark | 5,228 | 5,218 |
Memory & Platform
The Xeon E5-2643 uses the LGA2011 socket (PCIe 5.0), while the Atom x7405C uses FCBGA1264 (PCIe 4.0) — making them incompatible on the same motherboard.
| Feature | Xeon E5-2643 | Atom x7405C |
|---|---|---|
| Socket | LGA2011 | FCBGA1264 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | — | DDR5-4800 |
| Max RAM Capacity | — | 16 GB |
| RAM Channels | — | 1 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 9 |
Advanced Features
The Atom x7405C includes integrated graphics (Intel UHD Graphics), while the Xeon E5-2643 requires a dedicated GPU.
| Feature | Xeon E5-2643 | Atom x7405C |
|---|---|---|
| Integrated GPU | — | Yes |
| IGPU Model | — | Intel UHD Graphics |
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