CPU
GPU
Atom C3808
Xeon D-1521
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 C3808 is positioned at rank 737 and the Xeon D-1521 is on rank 505, so the Xeon D-1521 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Atom C3808
Performance Per Dollar Xeon D-1521
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom C3808 | Xeon D-1521 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($241) |
| Longevity | ✨ Modern (Goldmont (2016−2017) / 14 nm) | 🛑 Legacy (Broadwell (2015−2019) / 14 nm) |
💎 Value Proposition
| Insight | Atom C3808 | Xeon D-1521 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($241) |
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 C3808 and Xeon D-1521
Atom C3808
The Atom C3808 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 12 cores and 12 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 12 MB. L2 cache: 12 MB. Built on 14 nm process technology. Socket: FCBGA1310. Thermal design power (TDP): 25 Watt. Memory support: DDR4: 2133. Passmark benchmark score: 5,671 points. Launch price was $369.
Xeon D-1521
The Xeon D-1521 is manufactured by Intel. It was released in 1 November 2015 (10 years ago). It is based on the Broadwell (2015−2019) architecture. It features 4 cores and 8 threads. Base frequency is 2.4 GHz, with boost up to 2.7 GHz. L3 cache: 1.5 MB (per core). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1667. Thermal design power (TDP): 45 Watt. Memory support: DDR4, DDR3. Passmark benchmark score: 5,703 points. Launch price was $199.
Processing Power
The Atom C3808 packs 12 cores / 12 threads, while the Xeon D-1521 offers 4 cores / 8 threads — the Atom C3808 has 8 more cores. Boost clocks reach 2 GHz on the Atom C3808 versus 2.7 GHz on the Xeon D-1521 — a 29.8% clock advantage for the Xeon D-1521 (base: 2 GHz vs 2.4 GHz). The Atom C3808 uses the Goldmont (2016−2017) architecture (14 nm), while the Xeon D-1521 uses Broadwell (2015−2019) (14 nm). In PassMark, the Atom C3808 scores 5,671 against the Xeon D-1521's 5,703 — a 0.6% lead for the Xeon D-1521. L3 cache: 12 MB on the Atom C3808 vs 1.5 MB (per core) on the Xeon D-1521.
| Feature | Atom C3808 | Xeon D-1521 |
|---|---|---|
| Cores / Threads | 12 / 12+200% | 4 / 8 |
| Boost Clock | 2 GHz | 2.7 GHz+35% |
| Base Clock | 2 GHz | 2.4 GHz+20% |
| L3 Cache | 12 MB+700% | 1.5 MB (per core) |
| L2 Cache | 12 MB+4700% | 256K (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Goldmont (2016−2017) | Broadwell (2015−2019) |
| PassMark | 5,671 | 5,703 |
Memory & Platform
The Atom C3808 uses the FCBGA1310 socket (PCIe 3.0), while the Xeon D-1521 uses FCBGA1667 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Atom C3808 | Xeon D-1521 |
|---|---|---|
| Socket | FCBGA1310 | FCBGA1667 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2133 | — |
| Max RAM Capacity | 256 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ✅ | — |
| PCIe Lanes | 12 | — |
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