
Core i7-8565U

Xeon X5660
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 i7-8565U is positioned at rank 988 and the Xeon X5660 is on rank 990, so the Core i7-8565U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-8565U
Performance Per Dollar Xeon X5660
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-8565U | Xeon X5660 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($10) |
| Longevity | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Core i7-8565U | Xeon X5660 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($10) |
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 i7-8565U and Xeon X5660

Core i7-8565U
The Core i7-8565U 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 1.8 GHz, with boost up to 4.6 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: DDR4. Passmark benchmark score: 5,976 points. Launch price was $409.

Xeon X5660
The Xeon X5660 is manufactured by Intel. It was released in 16 March 2010 (15 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 6 cores and 12 threads. Base frequency is 2.8 GHz, with boost up to 3.2 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,979 points. Launch price was $33.
Processing Power
The Core i7-8565U packs 4 cores / 8 threads, while the Xeon X5660 offers 6 cores / 12 threads — the Xeon X5660 has 2 more cores. Boost clocks reach 4.6 GHz on the Core i7-8565U versus 3.2 GHz on the Xeon X5660 — a 35.9% clock advantage for the Core i7-8565U (base: 1.8 GHz vs 2.8 GHz). The Core i7-8565U uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Xeon X5660 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Core i7-8565U scores 5,976 against the Xeon X5660's 5,979 — a 0.1% lead for the Xeon X5660. L3 cache: 8 MB (total) on the Core i7-8565U vs 12 MB (total) on the Xeon X5660.
| Feature | Core i7-8565U | Xeon X5660 |
|---|---|---|
| Cores / Threads | 4 / 8 | 6 / 12+50% |
| Boost Clock | 4.6 GHz+44% | 3.2 GHz |
| Base Clock | 1.8 GHz | 2.8 GHz+56% |
| L3 Cache | 8 MB (total) | 12 MB (total)+50% |
| L2 Cache | 256 kB (per core) | 256 kB (per core) |
| Process | 14 nm-56% | 32 nm |
| Architecture | Whiskey Lake-U (2018−2019) | Westmere-EP (2010−2011) |
| PassMark | 5,976 | 5,979 |
Memory & Platform
The Core i7-8565U uses the FCBGA1528 socket (PCIe 3.0), while the Xeon X5660 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Core i7-8565U | Xeon X5660 |
|---|---|---|
| Socket | FCBGA1528 | LGA1366 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
| Max RAM Speed | — | DDR3-1333 |
| RAM Channels | — | 3 |
| ECC Support | — | ✅ |
Advanced Features
Virtualization: not specified (Core i7-8565U) / VT-x, VT-d, EPT (Xeon X5660). Primary use case: Xeon X5660 targets Workstation. Direct competitor: Xeon X5660 rivals Core i7-980X.
| Feature | Core i7-8565U | Xeon X5660 |
|---|---|---|
| Integrated GPU | — | No |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x, VT-d, EPT |
| Target Use | — | Workstation |
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