Core i5-1335U vs Xeon E5-2666 V3
Core i5-1335U
Xeon E5-2666 V3
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.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i5-1335U
Performance Per Dollar Xeon E5-2666 V3
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i5-1335U | Xeon E5-2666 V3 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Raptor Lake-U (2023) / Intel 7 nm) | 🛑 Legacy (Haswell-EP (2014−2015) / 22 nm) |
💎 Value Proposition
| Insight | Core i5-1335U | Xeon E5-2666 V3 |
|---|---|---|
| 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 Core i5-1335U and Xeon E5-2666 V3
Core i5-1335U
The Core i5-1335U is manufactured by Intel. It was released in 4 January 2023 (2 years ago). It is based on the Raptor Lake-U (2023) architecture. It features 10 cores and 12 threads. Base frequency is 1.3 GHz, with boost up to 4.6 GHz. L3 cache: 12 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 15 Watt. Memory support: DDR5-5200, DDR4-3200, LPDDR4x-4267. Passmark benchmark score: 14,093 points. Launch price was $340.
Xeon E5-2666 V3
The Xeon E5-2666 V3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 10 cores and 20 threads. Base frequency is 2.9 GHz, with boost up to 3.5 GHz. L3 cache: 25 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 135 Watt. Memory support: DDR3, DDR4 2133 MHz Quad-channel. Passmark benchmark score: 14,044 points. Launch price was $800.
Processing Power
The Core i5-1335U packs 10 cores / 12 threads, matching the Xeon E5-2666 V3's 10 cores. Boost clocks reach 4.6 GHz on the Core i5-1335U versus 3.5 GHz on the Xeon E5-2666 V3 — a 27.2% clock advantage for the Core i5-1335U (base: 1.3 GHz vs 2.9 GHz). The Core i5-1335U uses the Raptor Lake-U (2023) architecture (Intel 7 nm), while the Xeon E5-2666 V3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Core i5-1335U scores 14,093 against the Xeon E5-2666 V3's 14,044 — a 0.3% lead for the Core i5-1335U. L3 cache: 12 MB (total) on the Core i5-1335U vs 25 MB (total) on the Xeon E5-2666 V3.
| Feature | Core i5-1335U | Xeon E5-2666 V3 |
|---|---|---|
| Cores / Threads | 10 / 12 | 10 / 20 |
| Boost Clock | 4.6 GHz+31% | 3.5 GHz |
| Base Clock | 1.3 GHz | 2.9 GHz+123% |
| L3 Cache | 12 MB (total) | 25 MB (total)+108% |
| L2 Cache | 1.25 MB (per core)+400% | 256K (per core) |
| Process | Intel 7 nm-68% | 22 nm |
| Architecture | Raptor Lake-U (2023) | Haswell-EP (2014−2015) |
| PassMark | 14,093 | 14,044 |
| Cinebench R23 Multi | 8,977 | — |
| Geekbench 6 Single | 2,389 | — |
| Geekbench 6 Multi | 9,456 | — |
Memory & Platform
The Core i5-1335U uses the FCBGA1744 socket (PCIe 3.0), while the Xeon E5-2666 V3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Core i5-1335U | Xeon E5-2666 V3 |
|---|---|---|
| Socket | FCBGA1744 | LGA2011-3 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | LPDDR5-6400 | — |
| Max RAM Capacity | 96 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 20 | — |
Advanced Features
Virtualization: VT-x, VT-d, EPT (Core i5-1335U) / not specified (Xeon E5-2666 V3). The Core i5-1335U includes integrated graphics (Iris Xe Graphics (80 EU)), while the Xeon E5-2666 V3 requires a dedicated GPU. Primary use case: Core i5-1335U targets Productivity. Direct competitor: Core i5-1335U rivals Ryzen 5 7535U.
| Feature | Core i5-1335U | Xeon E5-2666 V3 |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Iris Xe Graphics (80 EU) | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d, EPT | — |
| Target Use | Productivity | — |
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