CPU
GPU
Core 2 Extreme X7900
Core 2 Duo U7500
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 Extreme X7900 is positioned at rank 1162 and the Core 2 Duo U7500 is on rank 1051, so the Core 2 Duo U7500 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 Extreme X7900
Performance Per Dollar Core 2 Duo U7500
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Extreme X7900 | Core 2 Duo U7500 |
|---|---|---|
| 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 (Merom (2006−2008) / 65 nm) | 🛑 Legacy (Merom-2048 (2006−2008) / 65 nm) |
💎 Value Proposition
| Insight | Core 2 Extreme X7900 | Core 2 Duo U7500 |
|---|---|---|
| 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 2 Extreme X7900 and Core 2 Duo U7500
Core 2 Extreme X7900
The Core 2 Extreme X7900 is manufactured by Intel. It was released in 1 September 2007 (18 years ago). It is based on the Merom (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 0 kB. L2 cache: 4 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 44 Watt. Memory support: DDR1. Passmark benchmark score: 1,115 points. Launch price was $851.
Core 2 Duo U7500
The Core 2 Duo U7500 is manufactured by Intel. It was released in 2008-01-01. It is based on the Merom-2048 (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 1.06 GHz, with boost up to 1.06 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: BGA479. Thermal design power (TDP): 10 Watt. Passmark benchmark score: 1,116 points. Launch price was $249.
Processing Power
Both the Core 2 Extreme X7900 and Core 2 Duo U7500 share an identical 2-core/2-thread configuration. Boost clocks reach 2.8 GHz on the Core 2 Extreme X7900 versus 1.06 GHz on the Core 2 Duo U7500 — a 90.2% clock advantage for the Core 2 Extreme X7900 (base: 2.8 GHz vs 1.06 GHz). The Core 2 Extreme X7900 uses the Merom (2006−2008) architecture (65 nm), while the Core 2 Duo U7500 uses Merom-2048 (2006−2008) (65 nm). In PassMark, the Core 2 Extreme X7900 scores 1,115 against the Core 2 Duo U7500's 1,116 — a 0.1% lead for the Core 2 Duo U7500. Both processors carry 0 kB of L3 cache.
| Feature | Core 2 Extreme X7900 | Core 2 Duo U7500 |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2.8 GHz+164% | 1.06 GHz |
| Base Clock | 2.8 GHz+164% | 1.06 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 4 MB+100% | 2 MB |
| Process | 65 nm | 65 nm |
| Architecture | Merom (2006−2008) | Merom-2048 (2006−2008) |
| PassMark | 1,115 | 1,116 |
| Geekbench 6 Single | — | 180 |
| Geekbench 6 Multi | — | 320 |
Memory & Platform
The Core 2 Extreme X7900 uses the PGA478 socket (PCIe 1.1), while the Core 2 Duo U7500 uses BGA479 (PCIe 1.1) — making them incompatible on the same motherboard. Both support up to DDR2-667 memory speed. The Core 2 Extreme X7900 supports up to 4 GB of RAM compared to 2 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 0 PCIe lanes.
| Feature | Core 2 Extreme X7900 | Core 2 Duo U7500 |
|---|---|---|
| Socket | PGA478 | BGA479 |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | DDR2-667 | DDR2-533 |
| Max RAM Capacity | 4 GB+100% | 2 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 0 |
Advanced Features
Only the Core 2 Extreme X7900 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support VT-x virtualization. Primary use case: Core 2 Extreme X7900 targets Mobile, Core 2 Duo U7500 targets Ultra Low Voltage Laptop.
| Feature | Core 2 Extreme X7900 | Core 2 Duo U7500 |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | VT-x | VT-x |
| Target Use | Mobile | Ultra Low Voltage Laptop |
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