CPU
GPU
Atom C3955
Xeon X5650
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 C3955 is positioned at rank 765 and the Xeon X5650 is on rank 502, so the Xeon X5650 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Atom C3955
Performance Per Dollar Xeon X5650
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom C3955 | Xeon X5650 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Goldmont (2016−2017) / 14 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Atom C3955 | Xeon X5650 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 C3955 and Xeon X5650
Atom C3955
The Atom C3955 is manufactured by Intel. It was released in 15 August 2017 (8 years ago). It is based on the Goldmont (2016−2017) architecture. It features 16 cores and 16 threads. Base frequency is 2.1 GHz, with boost up to 2.4 GHz. L3 cache: 16 MB. L2 cache: 16 MB. Built on 14 nm process technology. Socket: FCBGA1310. Thermal design power (TDP): 32 Watt. Memory support: DDR4: 2400. Passmark benchmark score: 5,803 points. Launch price was $434.
Xeon X5650
The Xeon X5650 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 6 cores and 12 threads. Base frequency is 2.66 GHz, with boost up to 3.06 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,742 points. Launch price was $53.
Processing Power
The Atom C3955 packs 16 cores / 16 threads, while the Xeon X5650 offers 6 cores / 12 threads — the Atom C3955 has 10 more cores. Boost clocks reach 2.4 GHz on the Atom C3955 versus 3.06 GHz on the Xeon X5650 — a 24.2% clock advantage for the Xeon X5650 (base: 2.1 GHz vs 2.66 GHz). The Atom C3955 uses the Goldmont (2016−2017) architecture (14 nm), while the Xeon X5650 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Atom C3955 scores 5,803 against the Xeon X5650's 5,742 — a 1.1% lead for the Atom C3955. L3 cache: 16 MB on the Atom C3955 vs 12 MB (total) on the Xeon X5650.
| Feature | Atom C3955 | Xeon X5650 |
|---|---|---|
| Cores / Threads | 16 / 16+167% | 6 / 12 |
| Boost Clock | 2.4 GHz | 3.06 GHz+28% |
| Base Clock | 2.1 GHz | 2.66 GHz+27% |
| L3 Cache | 16 MB+33% | 12 MB (total) |
| L2 Cache | 16 MB+6300% | 256 kB (per core) |
| Process | 14 nm-56% | 32 nm |
| Architecture | Goldmont (2016−2017) | Westmere-EP (2010−2011) |
| PassMark | 5,803+1% | 5,742 |
Memory & Platform
The Atom C3955 uses the FCBGA1310 socket (PCIe 3.0), while the Xeon X5650 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2400 on the Atom C3955 versus DDR3-1333 on the Xeon X5650 — the Atom C3955 supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. Memory channels: 2 (Atom C3955) vs 3 (Xeon X5650). Chipset compatibility: Intel FCBGA1310 (Atom C3955) and Intel X58,Intel 5520 (Xeon X5650).
| Feature | Atom C3955 | Xeon X5650 |
|---|---|---|
| Socket | FCBGA1310 | LGA1366 |
| PCIe Generation | PCIe 3.0 | PCIe 5.0+67% |
| Max RAM Speed | DDR4-2400+33% | DDR3-1333 |
| Max RAM Capacity | 256 GB | — |
| RAM Channels | 2 | 3+50% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 12 | — |
Advanced Features
Virtualization: not specified (Atom C3955) / VT-x, VT-d, EPT (Xeon X5650). Primary use case: Xeon X5650 targets Workstation. Direct competitor: Xeon X5650 rivals Core i7-980X.
| Feature | Atom C3955 | Xeon X5650 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x, VT-d, EPT |
| Target Use | — | Workstation |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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