Core i7-8665U vs Xeon X5670
Core i7-8665U
Xeon X5670
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 i7-8665U is positioned at rank 544 and the Xeon X5670 is on rank 469, so the Xeon X5670 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-8665U
Performance Per Dollar Xeon X5670
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-8665U | Xeon X5670 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($30) |
| Longevity | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Core i7-8665U | Xeon X5670 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($30) |
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 i7-8665U and Xeon X5670
Core i7-8665U
The Core i7-8665U 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 1.9 GHz, with boost up to 4.8 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: 6,202 points. Launch price was $409.
Xeon X5670
The Xeon X5670 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 2.93 GHz, with boost up to 3.33 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: 6,160 points. Launch price was $67.
Processing Power
The Core i7-8665U packs 4 cores / 8 threads, while the Xeon X5670 offers 6 cores / 12 threads — the Xeon X5670 has 2 more cores. Boost clocks reach 4.8 GHz on the Core i7-8665U versus 3.33 GHz on the Xeon X5670 — a 36.2% clock advantage for the Core i7-8665U (base: 1.9 GHz vs 2.93 GHz). The Core i7-8665U uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the Xeon X5670 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Core i7-8665U scores 6,202 against the Xeon X5670's 6,160 — a 0.7% lead for the Core i7-8665U. L3 cache: 8 MB (total) on the Core i7-8665U vs 12 MB (total) on the Xeon X5670.
| Feature | Core i7-8665U | Xeon X5670 |
|---|---|---|
| Cores / Threads | 4 / 8 | 6 / 12+50% |
| Boost Clock | 4.8 GHz+44% | 3.33 GHz |
| Base Clock | 1.9 GHz | 2.93 GHz+54% |
| 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 | 6,202 | 6,160 |
Memory & Platform
The Core i7-8665U uses the FCBGA1528 socket (PCIe 3.0), while the Xeon X5670 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Core i7-8665U | Xeon X5670 |
|---|---|---|
| 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 i7-8665U) / VT-x, VT-d, EPT (Xeon X5670). Primary use case: Xeon X5670 targets Workstation. Direct competitor: Xeon X5670 rivals Core i7-980X.
| Feature | Core i7-8665U | Xeon X5670 |
|---|---|---|
| Integrated GPU | — | No |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x, VT-d, EPT |
| Target Use | — | Workstation |
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