Core 2 Duo E8400 vs Core i7-640UM
Core 2 Duo E8400
Core i7-640UM
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 2 Duo E8400 is positioned at rank 508 and the Core i7-640UM is on rank 1229, so the Core 2 Duo E8400 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core 2 Duo E8400
Performance Per Dollar Core i7-640UM
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Duo E8400 | Core i7-640UM |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Wolfdale (2008−2010) / 45 nm) | 🛑 Legacy (Arrandale (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Core 2 Duo E8400 | Core i7-640UM |
|---|---|---|
| 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 2 Duo E8400 and Core i7-640UM
Core 2 Duo E8400
The Core 2 Duo E8400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Wolfdale (2008−2010) architecture. It features 2 cores and 2 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 0 kB. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,165 points. Launch price was $249.
Core i7-640UM
The Core i7-640UM is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.2 GHz, with boost up to 2.27 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3-800. Passmark benchmark score: 1,168 points. Launch price was $305.
Processing Power
The Core 2 Duo E8400 packs 2 cores / 2 threads, matching the Core i7-640UM's 2 cores. Boost clocks reach 3 GHz on the Core 2 Duo E8400 versus 2.27 GHz on the Core i7-640UM — a 27.7% clock advantage for the Core 2 Duo E8400 (base: 3 GHz vs 1.2 GHz). The Core 2 Duo E8400 uses the Wolfdale (2008−2010) architecture (45 nm), while the Core i7-640UM uses Arrandale (2010−2011) (32 nm). In PassMark, the Core 2 Duo E8400 scores 1,165 against the Core i7-640UM's 1,168 — a 0.3% lead for the Core i7-640UM. L3 cache: 0 kB on the Core 2 Duo E8400 vs 4 MB (total) on the Core i7-640UM.
| Feature | Core 2 Duo E8400 | Core i7-640UM |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 4 |
| Boost Clock | 3 GHz+32% | 2.27 GHz |
| Base Clock | 3 GHz+150% | 1.2 GHz |
| L3 Cache | 0 kB | 4 MB (total) |
| L2 Cache | 6 MB (total)+2300% | 256 kB (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Wolfdale (2008−2010) | Arrandale (2010−2011) |
| PassMark | 1,165 | 1,168 |
| Geekbench 6 Single | — | 226 |
| Geekbench 6 Multi | — | 590 |
Memory & Platform
The Core 2 Duo E8400 uses the LGA775 socket (PCIe 1.1), while the Core i7-640UM uses BGA1288 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1333 on the Core 2 Duo E8400 versus DDR3-1066 on the Core i7-640UM — the Core 2 Duo E8400 supports 199.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core 2 Duo E8400 supports up to 16 of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: P35,G31,G33,P45 (Core 2 Duo E8400) and HM55,QM57 (Core i7-640UM).
| Feature | Core 2 Duo E8400 | Core i7-640UM |
|---|---|---|
| Socket | LGA775 | BGA1288 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | 1333+44333% | DDR3-1066 |
| Max RAM Capacity | 16 | 8 GB+52428700% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 16 |
Advanced Features
Neither processor supports overclocking. Virtualization support: true (Core 2 Duo E8400) vs VT-x, VT-d (Core i7-640UM). The Core i7-640UM includes integrated graphics (Intel HD Graphics (Ironlake)), while the Core 2 Duo E8400 requires a dedicated GPU. Primary use case: Core i7-640UM targets Legacy Laptop. Direct competitor: Core 2 Duo E8400 rivals Phenom II X2 550; Core i7-640UM rivals Core 2 Duo SU9600.
| Feature | Core 2 Duo E8400 | Core i7-640UM |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | Intel HD Graphics (Ironlake) |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | VT-x, VT-d |
| Target Use | — | Legacy Laptop |
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