CPU
GPU
Core 2 Quad Q8400
Core 2 Quad Q6700
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 Quad Q8400 is positioned at rank 975 and the Core 2 Quad Q6700 is on rank 1079, so the Core 2 Quad Q8400 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 Quad Q8400
Performance Per Dollar Core 2 Quad Q6700
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Quad Q8400 | Core 2 Quad Q6700 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($128) | ✅ More affordable ($50) |
| Longevity | 🛑 Legacy (Yorkfield (2007−2009) / 45 nm) | 🛑 Legacy (Kentsfield (2007) / 65 nm) |
💎 Value Proposition
| Insight | Core 2 Quad Q8400 | Core 2 Quad Q6700 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+158%) |
| Upfront Cost | ⚠️ Higher cost ($128) | ✅ More affordable ($50) |
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 Quad Q8400 and Core 2 Quad Q6700
Core 2 Quad Q8400
The Core 2 Quad Q8400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Yorkfield (2007−2009) architecture. It features 4 cores and 4 threads. Base frequency is 2.66 GHz, with boost up to 0.67 GHz. L3 cache: 0 kB. L2 cache: 4 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 2,076 points. Launch price was $249.
Core 2 Quad Q6700
The Core 2 Quad Q6700 is manufactured by Intel. It was released in 2008-01-01. It is based on the Kentsfield (2007) architecture. It features 4 cores and 4 threads. Base frequency is 2.66 GHz, with boost up to 2.67 GHz. L3 cache: 0 kB. L2 cache: 8 MB (total). Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 105 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 2,092 points. Launch price was $249.
Processing Power
Both the Core 2 Quad Q8400 and Core 2 Quad Q6700 share an identical 4-core/4-thread configuration. Boost clocks reach 0.67 GHz on the Core 2 Quad Q8400 versus 2.67 GHz on the Core 2 Quad Q6700 — a 119.8% clock advantage for the Core 2 Quad Q6700 (base: 2.66 GHz vs 2.66 GHz). The Core 2 Quad Q8400 uses the Yorkfield (2007−2009) architecture (45 nm), while the Core 2 Quad Q6700 uses Kentsfield (2007) (65 nm). In PassMark, the Core 2 Quad Q8400 scores 2,076 against the Core 2 Quad Q6700's 2,092 — a 0.8% lead for the Core 2 Quad Q6700. Both processors carry 0 kB of L3 cache.
| Feature | Core 2 Quad Q8400 | Core 2 Quad Q6700 |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 4 |
| Boost Clock | 0.67 GHz | 2.67 GHz+299% |
| Base Clock | 2.66 GHz | 2.66 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 4 MB (total) | 8 MB (total)+100% |
| Process | 45 nm-31% | 65 nm |
| Architecture | Yorkfield (2007−2009) | Kentsfield (2007) |
| PassMark | 2,076 | 2,092 |
| Cinebench R23 Multi | 852 | — |
| Geekbench 6 Single | 369 | — |
| Geekbench 6 Multi | 1,155 | — |
Memory & Platform
Both processors use the LGA775 socket with PCIe 1.1. Maximum memory speed reaches DDR3 1333 MHz on the Core 2 Quad Q8400 versus DDR2-800 on the Core 2 Quad Q6700 — the Core 2 Quad Q8400 supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core 2 Quad Q8400 supports up to 16 GB of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: Intel P45,Intel G41,Intel Q45,Intel X48,Intel G31 (Core 2 Quad Q8400) and P45,G45 (Core 2 Quad Q6700).
| Feature | Core 2 Quad Q8400 | Core 2 Quad Q6700 |
|---|---|---|
| Socket | LGA775 | LGA775 |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | DDR3 1333 MHz+50% | DDR2-800 |
| Max RAM Capacity | 16 GB+100% | 8 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Neither processor supports overclocking. Virtualization support: true (Core 2 Quad Q8400) vs VT-x (Core 2 Quad Q6700). Primary use case: Core 2 Quad Q8400 targets Desktop.
| Feature | Core 2 Quad Q8400 | Core 2 Quad Q6700 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | VT-x |
| Target Use | Desktop | — |
Value Analysis
The Core 2 Quad Q8400 launched at $183 MSRP, while the Core 2 Quad Q6700 debuted at $530. At current prices ($128 vs $50), the Core 2 Quad Q6700 is $78 cheaper. In terms of value (PassMark points per dollar), the Core 2 Quad Q8400 delivers 16.2 pts/$ vs 41.8 pts/$ for the Core 2 Quad Q6700 — making the Core 2 Quad Q6700 the 88.3% better value option.
| Feature | Core 2 Quad Q8400 | Core 2 Quad Q6700 |
|---|---|---|
| MSRP | $183-65% | $530 |
| Avg Price (30d) | $128 | $50-61% |
| Performance per Dollar | 16.2 | 41.8+158% |
| Release Date | 2009 | 2007 |
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