Atom x7405C vs Xeon E5-2643
Atom x7405C
Xeon E5-2643
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 Atom x7405C is positioned at rank 180 and the Xeon E5-2643 is on rank 1009, 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 Atom x7405C
Performance Per Dollar Xeon E5-2643
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom x7405C | Xeon E5-2643 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($50) |
| Longevity | ✨ Modern (Amston Lake (2024−2025) / 10 nm) | 🛑 Legacy (Sandy Bridge-EP (2012) / 32 nm) |
💎 Value Proposition
| Insight | Atom x7405C | Xeon E5-2643 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($50) |
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 Atom x7405C and Xeon E5-2643
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.
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.
Processing Power
The Atom x7405C packs 4 cores / 4 threads, matching the Xeon E5-2643's 4 cores. Boost clocks reach 3.4 GHz on the Atom x7405C versus 3.5 GHz on the Xeon E5-2643 — a 2.9% clock advantage for the Xeon E5-2643 (base: 1.7 GHz vs 3.3 GHz). The Atom x7405C uses the Amston Lake (2024−2025) architecture (10 nm), while the Xeon E5-2643 uses Sandy Bridge-EP (2012) (32 nm). In PassMark, the Atom x7405C scores 5,218 against the Xeon E5-2643's 5,228 — a 0.2% lead for the Xeon E5-2643. L3 cache: 6 MB (total) on the Atom x7405C vs 10240 kB (total) on the Xeon E5-2643.
| Feature | Atom x7405C | Xeon E5-2643 |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 8 |
| Boost Clock | 3.4 GHz | 3.5 GHz+3% |
| Base Clock | 1.7 GHz | 3.3 GHz+94% |
| L3 Cache | 6 MB (total) | 10240 kB (total)+67% |
| L2 Cache | 2 MB (total)+700% | 256 kB (per core) |
| Process | 10 nm-69% | 32 nm |
| Architecture | Amston Lake (2024−2025) | Sandy Bridge-EP (2012) |
| PassMark | 5,218 | 5,228 |
Memory & Platform
The Atom x7405C uses the FCBGA1264 socket (PCIe 4.0), while the Xeon E5-2643 uses LGA2011 (PCIe 5.0) — making them incompatible on the same motherboard.
| Feature | Atom x7405C | Xeon E5-2643 |
|---|---|---|
| Socket | FCBGA1264 | LGA2011 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| 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 | Atom x7405C | Xeon E5-2643 |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Intel UHD Graphics | — |
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