CPU
GPU
Core 2 Duo T6670
Core i5-661
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 T6670 is positioned at rank 474 and the Core i5-661 is on rank 959, so the Core 2 Duo T6670 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 T6670
Performance Per Dollar Core i5-661
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Duo T6670 | Core i5-661 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($40) |
| Longevity | 🛑 Legacy (Penryn (2008−2011) / 45 nm) | 🛑 Legacy (Clarkdale (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Core 2 Duo T6670 | Core i5-661 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($40) |
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 T6670 and Core i5-661
Core 2 Duo T6670
The Core 2 Duo T6670 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.2 GHz, with boost up to 2.2 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 2,365 points. Launch price was $249.
Core i5-661
The Core i5-661 is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Clarkdale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 3.33 GHz, with boost up to 3.6 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1156. Thermal design power (TDP): 87 Watt. Memory support: DDR3. Passmark benchmark score: 2,387 points. Launch price was $252.
Processing Power
The Core 2 Duo T6670 packs 2 cores / 2 threads, matching the Core i5-661's 2 cores. Boost clocks reach 2.2 GHz on the Core 2 Duo T6670 versus 3.6 GHz on the Core i5-661 — a 48.3% clock advantage for the Core i5-661 (base: 2.2 GHz vs 3.33 GHz). The Core 2 Duo T6670 uses the Penryn (2008−2011) architecture (45 nm), while the Core i5-661 uses Clarkdale (2010−2011) (32 nm). In PassMark, the Core 2 Duo T6670 scores 2,365 against the Core i5-661's 2,387 — a 0.9% lead for the Core i5-661. L3 cache: 2 MB L2 Cache on the Core 2 Duo T6670 vs 4 MB (total) on the Core i5-661.
| Feature | Core 2 Duo T6670 | Core i5-661 |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 4 |
| Boost Clock | 2.2 GHz | 3.6 GHz+64% |
| Base Clock | 2.2 GHz | 3.33 GHz+51% |
| L3 Cache | 2 MB L2 Cache | 4 MB (total)+100% |
| L2 Cache | 2 MB+700% | 256 kB (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Penryn (2008−2011) | Clarkdale (2010−2011) |
| PassMark | 2,365 | 2,387 |
| Geekbench 6 Single | 252 | — |
| Geekbench 6 Multi | 252 | — |
Memory & Platform
The Core 2 Duo T6670 uses the PGA478 socket (PCIe 1.1), while the Core i5-661 uses LGA1156 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Core 2 Duo T6670 | Core i5-661 |
|---|---|---|
| Socket | PGA478 | LGA1156 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR3-1066 | — |
| Max RAM Capacity | 8 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 0 | — |
Advanced Features
Virtualization: VT-x (Core 2 Duo T6670) / not specified (Core i5-661). Primary use case: Core 2 Duo T6670 targets Budget. Direct competitor: Core 2 Duo T6670 rivals Core 2 Duo T6600.
| Feature | Core 2 Duo T6670 | Core i5-661 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x | — |
| Target Use | Budget | — |
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