Athlon 64 FX-72 vs Phenom II X3 B75
Athlon 64 FX-72
Phenom II X3 B75
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 Athlon 64 FX-72 is positioned at rank 1100 and the Phenom II X3 B75 is on rank 361, so the Phenom II X3 B75 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon 64 FX-72
Performance Per Dollar Phenom II X3 B75
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon 64 FX-72 | Phenom II X3 B75 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($40) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Windsor (2006−2007) / 90 nm) | 🛑 Legacy (Heka (2009−2010) / 45 nm) |
💎 Value Proposition
| Insight | Athlon 64 FX-72 | Phenom II X3 B75 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($40) | ✅ More affordable ($0) |
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 Athlon 64 FX-72 and Phenom II X3 B75
Athlon 64 FX-72
The Athlon 64 FX-72 is manufactured by AMD. It was released in 2009-01-01. It is based on the Windsor (2006−2007) architecture. It features 2 cores and 2 threads. Max frequency: 2.8 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 90 nm process technology. Socket: F. Thermal design power (TDP): 125 Watt. Memory support: DDR1. Passmark benchmark score: 1,794 points. Launch price was $149.
Phenom II X3 B75
The Phenom II X3 B75 is manufactured by AMD. It was released in 2009-01-01. It is based on the Heka (2009−2010) architecture. It features 3 cores and 3 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 6 MB (total). 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: 1,783 points. Launch price was $149.
Processing Power
The Athlon 64 FX-72 packs 2 cores / 2 threads, while the Phenom II X3 B75 offers 3 cores / 3 threads — the Phenom II X3 B75 has 1 more core. Boost clocks reach 2.8 GHz on the Athlon 64 FX-72 versus 3 GHz on the Phenom II X3 B75 — a 6.9% clock advantage for the Phenom II X3 B75. The Athlon 64 FX-72 uses the Windsor (2006−2007) architecture (90 nm), while the Phenom II X3 B75 uses Heka (2009−2010) (45 nm). In PassMark, the Athlon 64 FX-72 scores 1,794 against the Phenom II X3 B75's 1,783 — a 0.6% lead for the Athlon 64 FX-72. L3 cache: 0 kB on the Athlon 64 FX-72 vs 6 MB (total) on the Phenom II X3 B75.
| Feature | Athlon 64 FX-72 | Phenom II X3 B75 |
|---|---|---|
| Cores / Threads | 2 / 2 | 3 / 3+50% |
| Boost Clock | 2.8 GHz | 3 GHz+7% |
| Base Clock | — | 3 GHz |
| L3 Cache | 0 kB | 6 MB (total) |
| L2 Cache | 1 MB+100% | 512 kB (per core) |
| Process | 90 nm | 45 nm-50% |
| Architecture | Windsor (2006−2007) | Heka (2009−2010) |
| PassMark | 1,794 | 1,783 |
Memory & Platform
The Athlon 64 FX-72 uses the F socket (PCIe 1.1), while the Phenom II X3 B75 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Athlon 64 FX-72 | Phenom II X3 B75 |
|---|---|---|
| Socket | F | AM3 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR2-800 | — |
| Max RAM Capacity | 16 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 0 | — |
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