Xeon E5-2660 v3 vs Core i7-1255U
Xeon E5-2660 v3
Core i7-1255U
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 Xeon E5-2660 v3
Performance Per Dollar Core i7-1255U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5-2660 v3 | Core i7-1255U |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($150) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Haswell-EP (2014−2015) / 22 nm) | ✨ Modern (Alder Lake-U (2022) / Intel 7 nm) |
💎 Value Proposition
| Insight | Xeon E5-2660 v3 | Core i7-1255U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($150) | ✅ More affordable ($0) |
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 Xeon E5-2660 v3 and Core i7-1255U
Xeon E5-2660 v3
The Xeon E5-2660 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 2.6 GHz, with boost up to 3.3 GHz. L3 cache: 25 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 105 Watt. Memory support: DDR4-1600, DDR4-1866, DDR4-2133. Passmark benchmark score: 13,039 points. Launch price was $800.
Core i7-1255U
The Core i7-1255U is manufactured by Intel. It was released in 23 February 2022 (3 years ago). It is based on the Alder Lake-U (2022) architecture. It features 10 cores and 12 threads. Base frequency is 1.7 GHz, with boost up to 4.7 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: DDR4, DDR5. Passmark benchmark score: 13,128 points. Launch price was $149.
Processing Power
The Xeon E5-2660 v3 packs 10 cores / 20 threads, matching the Core i7-1255U's 10 cores. Boost clocks reach 3.3 GHz on the Xeon E5-2660 v3 versus 4.7 GHz on the Core i7-1255U — a 35% clock advantage for the Core i7-1255U (base: 2.6 GHz vs 1.7 GHz). The Xeon E5-2660 v3 uses the Haswell-EP (2014−2015) architecture (22 nm), while the Core i7-1255U uses Alder Lake-U (2022) (Intel 7 nm). In PassMark, the Xeon E5-2660 v3 scores 13,039 against the Core i7-1255U's 13,128 — a 0.7% lead for the Core i7-1255U. L3 cache: 25 MB (total) on the Xeon E5-2660 v3 vs 12 MB (total) on the Core i7-1255U.
| Feature | Xeon E5-2660 v3 | Core i7-1255U |
|---|---|---|
| Cores / Threads | 10 / 20 | 10 / 12 |
| Boost Clock | 3.3 GHz | 4.7 GHz+42% |
| Base Clock | 2.6 GHz+53% | 1.7 GHz |
| L3 Cache | 25 MB (total)+108% | 12 MB (total) |
| L2 Cache | 256K (per core) | 1.25 MB (per core)+400% |
| Process | 22 nm | Intel 7 nm-68% |
| Architecture | Haswell-EP (2014−2015) | Alder Lake-U (2022) |
| PassMark | 13,039 | 13,128 |
| Geekbench 6 Single | — | 1,809 |
Memory & Platform
The Xeon E5-2660 v3 uses the LGA2011 socket (PCIe 3.0), while the Core i7-1255U uses FCBGA1744 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2133 on the Xeon E5-2660 v3 versus DDR5-4800 on the Core i7-1255U — the Core i7-1255U supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5-2660 v3 supports up to 768 GB of RAM compared to 64 GB — 169.2% more capacity for professional workloads. Memory channels: 4 (Xeon E5-2660 v3) vs 2 (Core i7-1255U). PCIe lanes: 40 (Xeon E5-2660 v3) vs 20 (Core i7-1255U) — the Xeon E5-2660 v3 offers 20 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel X99,Intel C612 (Xeon E5-2660 v3) and Alder Lake-U (Core i7-1255U).
| Feature | Xeon E5-2660 v3 | Core i7-1255U |
|---|---|---|
| Socket | LGA2011 | FCBGA1744 |
| PCIe Generation | PCIe 3.0 | PCIe 5.0+67% |
| Max RAM Speed | DDR4-2133 | DDR5-4800+25% |
| Max RAM Capacity | 768 GB+1100% | 64 GB |
| RAM Channels | 4+100% | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 40+100% | 20 |
Advanced Features
Neither processor supports overclocking. Only the Xeon E5-2660 v3 supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d (Xeon E5-2660 v3) vs VT-x, VT-d, EPT (Core i7-1255U). The Core i7-1255U includes integrated graphics (Iris Xe Graphics 96EU), while the Xeon E5-2660 v3 requires a dedicated GPU. Primary use case: Xeon E5-2660 v3 targets Server, Core i7-1255U targets Mainstream Laptop. Direct competitor: Core i7-1255U rivals Ryzen 7 6800U.
| Feature | Xeon E5-2660 v3 | Core i7-1255U |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Iris Xe Graphics 96EU |
| Unlocked | No | No |
| AVX-512 | Yes | No |
| Virtualization | VT-x, VT-d | VT-x, VT-d, EPT |
| Target Use | Server | Mainstream Laptop |
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