CPU
GPU
Core i7-640UM
Core 2 Duo E6400
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 i7-640UM is positioned at rank 1229 and the Core 2 Duo E6400 is on rank 1059, so the Core 2 Duo E6400 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-640UM
Performance Per Dollar Core 2 Duo E6400
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-640UM | Core 2 Duo E6400 |
|---|---|---|
| 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 | 🛑 Legacy (Arrandale (2010−2011) / 32 nm) | 🛑 Legacy (Conroe (2006−2007) / 65 nm) |
💎 Value Proposition
| Insight | Core i7-640UM | Core 2 Duo E6400 |
|---|---|---|
| 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 i7-640UM and Core 2 Duo E6400
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.
Core 2 Duo E6400
The Core 2 Duo E6400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Conroe (2006−2007) architecture. It features 2 cores and 2 threads. Base frequency is 2.13 GHz, with boost up to 2.13 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,175 points. Launch price was $249.
Processing Power
The Core i7-640UM packs 2 cores / 4 threads, matching the Core 2 Duo E6400's 2 cores. Boost clocks reach 2.27 GHz on the Core i7-640UM versus 2.13 GHz on the Core 2 Duo E6400 — a 6.4% clock advantage for the Core i7-640UM (base: 1.2 GHz vs 2.13 GHz). The Core i7-640UM uses the Arrandale (2010−2011) architecture (32 nm), while the Core 2 Duo E6400 uses Conroe (2006−2007) (65 nm). In PassMark, the Core i7-640UM scores 1,168 against the Core 2 Duo E6400's 1,175 — a 0.6% lead for the Core 2 Duo E6400. L3 cache: 4 MB (total) on the Core i7-640UM vs 0 kB on the Core 2 Duo E6400.
| Feature | Core i7-640UM | Core 2 Duo E6400 |
|---|---|---|
| Cores / Threads | 2 / 4 | 2 / 2 |
| Boost Clock | 2.27 GHz+7% | 2.13 GHz |
| Base Clock | 1.2 GHz | 2.13 GHz+78% |
| L3 Cache | 4 MB (total) | 0 kB |
| L2 Cache | 256 kB (per core) | 2 MB+700% |
| Process | 32 nm-51% | 65 nm |
| Architecture | Arrandale (2010−2011) | Conroe (2006−2007) |
| PassMark | 1,168 | 1,175 |
| Geekbench 6 Single | 226 | — |
| Geekbench 6 Multi | 590 | — |
Memory & Platform
The Core i7-640UM uses the BGA1288 socket (PCIe 2.0), while the Core 2 Duo E6400 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core i7-640UM versus 1066 on the Core 2 Duo E6400 — the Core 2 Duo E6400 supports 198.9% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core 2 Duo E6400 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: HM55,QM57 (Core i7-640UM) and P35,G31,G33,P45 (Core 2 Duo E6400).
| Feature | Core i7-640UM | Core 2 Duo E6400 |
|---|---|---|
| Socket | BGA1288 | LGA775 |
| PCIe Generation | PCIe 2.0+82% | PCIe 1.1 |
| Max RAM Speed | DDR3-1066 | 1066+35433% |
| Max RAM Capacity | 8 GB+52428700% | 16 |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 16 |
Advanced Features
Neither processor supports overclocking. Virtualization support: VT-x, VT-d (Core i7-640UM) vs true (Core 2 Duo E6400). The Core i7-640UM includes integrated graphics (Intel HD Graphics (Ironlake)), while the Core 2 Duo E6400 requires a dedicated GPU. Primary use case: Core i7-640UM targets Legacy Laptop. Direct competitor: Core i7-640UM rivals Core 2 Duo SU9600; Core 2 Duo E6400 rivals Athlon 64 X2 5400+.
| Feature | Core i7-640UM | Core 2 Duo E6400 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Intel HD Graphics (Ironlake) | None |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d | true |
| Target Use | Legacy Laptop | — |
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