CPU
GPU
Core 2 Duo T6670
Athlon II X4 645
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 Athlon II X4 645 is on rank 819, 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 Athlon II X4 645
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Duo T6670 | Athlon II X4 645 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($20) |
| Longevity | 🛑 Legacy (Penryn (2008−2011) / 45 nm) | 🛑 Legacy (Propus (2009−2011) / 45 nm) |
💎 Value Proposition
| Insight | Core 2 Duo T6670 | Athlon II X4 645 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($20) |
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 Athlon II X4 645
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.
Athlon II X4 645
The Athlon II X4 645 is manufactured by AMD. It was released in 21 September 2010 (15 years ago). It is based on the Propus (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,375 points. Launch price was $80.
Processing Power
The Core 2 Duo T6670 packs 2 cores / 2 threads, while the Athlon II X4 645 offers 4 cores / 4 threads — the Athlon II X4 645 has 2 more cores. Boost clocks reach 2.2 GHz on the Core 2 Duo T6670 versus 3.1 GHz on the Athlon II X4 645 — a 34% clock advantage for the Athlon II X4 645 (base: 2.2 GHz vs 3.1 GHz). The Core 2 Duo T6670 uses the Penryn (2008−2011) architecture (45 nm), while the Athlon II X4 645 uses Propus (2009−2011) (45 nm). In PassMark, the Core 2 Duo T6670 scores 2,365 against the Athlon II X4 645's 2,375 — a 0.4% lead for the Athlon II X4 645. Geekbench 6 single-core — the metric most relevant to gaming — records 252 vs 399, a 45.2% lead for the Athlon II X4 645 that directly translates to higher frame rates. Multi-core Geekbench: 252 vs 1,374 (138% advantage for the Athlon II X4 645). L3 cache: 2 MB L2 Cache on the Core 2 Duo T6670 vs 0 kB on the Athlon II X4 645.
| Feature | Core 2 Duo T6670 | Athlon II X4 645 |
|---|---|---|
| Cores / Threads | 2 / 2 | 4 / 4+100% |
| Boost Clock | 2.2 GHz | 3.1 GHz+41% |
| Base Clock | 2.2 GHz | 3.1 GHz+41% |
| L3 Cache | 2 MB L2 Cache | 0 kB |
| L2 Cache | 2 MB+300% | 512 kB (per core) |
| Process | 45 nm | 45 nm |
| Architecture | Penryn (2008−2011) | Propus (2009−2011) |
| PassMark | 2,365 | 2,375 |
| Cinebench R23 Multi | — | 1,374 |
| Geekbench 6 Single | 252 | 399+58% |
| Geekbench 6 Multi | 252 | 1,374+445% |
Memory & Platform
The Core 2 Duo T6670 uses the PGA478 socket (PCIe 1.1), while the Athlon II X4 645 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3-1066 memory speed. The Athlon II X4 645 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. PCIe lanes: 0 (Core 2 Duo T6670) vs 16 (Athlon II X4 645) — the Athlon II X4 645 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GM45,PM45 (Core 2 Duo T6670) and AMD 700 Series,AMD 800 Series,AMD 900 Series (Athlon II X4 645).
| Feature | Core 2 Duo T6670 | Athlon II X4 645 |
|---|---|---|
| Socket | PGA478 | AM3 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR3-1066 | DDR3-1333 |
| Max RAM Capacity | 8 GB | 16 GB+100% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 16 |
Advanced Features
Virtualization support: VT-x (Core 2 Duo T6670) vs Yes (Athlon II X4 645). Primary use case: Core 2 Duo T6670 targets Budget, Athlon II X4 645 targets Desktop. Direct competitor: Core 2 Duo T6670 rivals Core 2 Duo T6600.
| Feature | Core 2 Duo T6670 | Athlon II X4 645 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | No | — |
| AVX-512 | No | No |
| Virtualization | VT-x | Yes |
| Target Use | Budget | Desktop |
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