Core i7-8665UE vs Xeon D-1520
Core i7-8665UE
Xeon D-1520
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 Core i7-8665UE is positioned at rank 1037 and the Xeon D-1520 is on rank 565, so the Xeon D-1520 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-8665UE
Performance Per Dollar Xeon D-1520
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-8665UE | Xeon D-1520 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($409) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) | 🛑 Legacy (Broadwell (2015−2019) / 14 nm) |
💎 Value Proposition
| Insight | Core i7-8665UE | Xeon D-1520 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($409) | ✅ 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 Core i7-8665UE and Xeon D-1520
Core i7-8665UE
The Core i7-8665UE is manufactured by Intel. It was released in 1 October 2018 (7 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 4 cores and 8 threads. Base frequency is 1.7 GHz, with boost up to 4.4 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 4,852 points. Launch price was $409.
Xeon D-1520
The Xeon D-1520 is manufactured by Intel. It was released in 9 March 2015 (10 years ago). It is based on the Broadwell (2015−2019) architecture. It features 4 cores and 8 threads. Base frequency is 2.2 GHz, with boost up to 2.6 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. Passmark benchmark score: 4,917 points. Launch price was $199.
Processing Power
Both the Core i7-8665UE and Xeon D-1520 share an identical 4-core/8-thread configuration. Boost clocks reach 4.4 GHz on the Core i7-8665UE versus 2.6 GHz on the Xeon D-1520 — a 51.4% clock advantage for the Core i7-8665UE (base: 1.7 GHz vs 2.2 GHz). The Core i7-8665UE uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Xeon D-1520 uses Broadwell (2015−2019) (14 nm). In PassMark, the Core i7-8665UE scores 4,852 against the Xeon D-1520's 4,917 — a 1.3% lead for the Xeon D-1520. L3 cache: 8 MB (total) on the Core i7-8665UE vs 1.5 MB (per core) on the Xeon D-1520.
| Feature | Core i7-8665UE | Xeon D-1520 |
|---|---|---|
| Cores / Threads | 4 / 8 | 4 / 8 |
| Boost Clock | 4.4 GHz+69% | 2.6 GHz |
| Base Clock | 1.7 GHz | 2.2 GHz+29% |
| L3 Cache | 8 MB (total)+433% | 1.5 MB (per core) |
| L2 Cache | 256 kB (per core) | 256K (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Whiskey Lake-U (2018−2019) | Broadwell (2015−2019) |
| PassMark | 4,852 | 4,917+1% |
Memory & Platform
The Core i7-8665UE uses the FCBGA1528 socket (PCIe 3.0), while the Xeon D-1520 uses FCBGA1667 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Core i7-8665UE | Xeon D-1520 |
|---|---|---|
| Socket | FCBGA1528 | FCBGA1667 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2400 | — |
| Max RAM Capacity | 64 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 16 | — |
Advanced Features
Virtualization: VT-x, VT-d (Core i7-8665UE) / not specified (Xeon D-1520). The Core i7-8665UE includes integrated graphics (UHD Graphics 620), while the Xeon D-1520 requires a dedicated GPU. Primary use case: Core i7-8665UE targets Embedded.
| Feature | Core i7-8665UE | Xeon D-1520 |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | UHD Graphics 620 | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d | — |
| Target Use | Embedded | — |
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