CPU
GPU
Celeron 3865U
Xeon L5240
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 Celeron 3865U is positioned at rank 645 and the Xeon L5240 is on rank 951, so the Celeron 3865U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron 3865U
Performance Per Dollar Xeon L5240
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron 3865U | Xeon L5240 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Kaby Lake-U (2017) / 14 nm) | 🛑 Legacy (Legacy / 45 nm) |
💎 Value Proposition
| Insight | Celeron 3865U | Xeon L5240 |
|---|---|---|
| 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 Celeron 3865U and Xeon L5240
Celeron 3865U
The Celeron 3865U is manufactured by Intel. It was released in 3 January 2017 (8 years ago). It is based on the Kaby Lake-U (2017) architecture. It features 2 cores and 2 threads. Base frequency is 1.8 GHz, with boost up to 1.8 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 1,343 points. Launch price was $107.
Xeon L5240
The Xeon L5240 is manufactured by Intel. It was released in 2015-01-01. Base frequency: 3 GHz. L3 cache: 6 MB L2 Cache. Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 40 Watt. Passmark benchmark score: 1,337 points. Launch price was $800.
Processing Power
The Celeron 3865U is built on the Kaby Lake-U (2017) architecture. In PassMark, the Celeron 3865U scores 1,343 against the Xeon L5240's 1,337 — a 0.4% lead for the Celeron 3865U. L3 cache: 2 MB (total) on the Celeron 3865U vs 6 MB L2 Cache on the Xeon L5240.
| Feature | Celeron 3865U | Xeon L5240 |
|---|---|---|
| Cores / Threads | 2 / 2 | — |
| Boost Clock | 1.8 GHz | — |
| Base Clock | 1.8 GHz | 3 GHz+67% |
| L3 Cache | 2 MB (total) | 6 MB L2 Cache+200% |
| L2 Cache | 256K (per core) | — |
| Process | 14 nm-69% | 45 nm |
| Architecture | Kaby Lake-U (2017) | — |
| PassMark | 1,343 | 1,337 |
| Geekbench 6 Single | 389 | — |
| Geekbench 6 Multi | 674 | — |
Memory & Platform
The Celeron 3865U uses the BGA1356 socket (PCIe 3.0), while the Xeon L5240 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Celeron 3865U | Xeon L5240 |
|---|---|---|
| Socket | BGA1356 | LGA771 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
| Max RAM Speed | DDR4-2133 / LPDDR3-1866 | — |
| Max RAM Capacity | 32 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 10 | — |
Advanced Features
Virtualization: VT-x / VT-d / EPT (Celeron 3865U) / not specified (Xeon L5240). The Celeron 3865U includes integrated graphics (Intel HD Graphics 610), while the Xeon L5240 requires a dedicated GPU. Primary use case: Celeron 3865U targets Entry-level. Direct competitor: Celeron 3865U rivals Pentium Gold 4415U.
| Feature | Celeron 3865U | Xeon L5240 |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Intel HD Graphics 610 | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x / VT-d / EPT | — |
| Target Use | Entry-level | — |
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