Athlon 64 X2 4000+ vs Sempron 3850
Athlon 64 X2 4000+
Sempron 3850
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 X2 4000+ is positioned at rank 1082 and the Sempron 3850 is on rank 507, so the Sempron 3850 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 X2 4000+
Performance Per Dollar Sempron 3850
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon 64 X2 4000+ | Sempron 3850 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($10) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Windsor (2006−2007) / 90 nm) | 🛑 Legacy (Kabini (2013−2014) / 28 nm) |
💎 Value Proposition
| Insight | Athlon 64 X2 4000+ | Sempron 3850 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($10) | ✅ 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 X2 4000+ and Sempron 3850
Athlon 64 X2 4000+
The Athlon 64 X2 4000+ 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 GHz. L3 cache: 0 kB. L2 cache: 512K. Built on 90 nm process technology. Socket: AM2. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 1,175 points. Launch price was $149.
Sempron 3850
The Sempron 3850 is manufactured by AMD. It was released in 2007-01-01. It is based on the Kabini (2013−2014) architecture. It features 4 cores and 4 threads. Max frequency: 1.3 GHz. L2 cache: 2048 kB. Built on 28 nm process technology. Socket: AM1. Thermal design power (TDP): 25 Watt. Memory support: DDR3-1600. Passmark benchmark score: 1,168 points. Launch price was $69.
Processing Power
The Athlon 64 X2 4000+ packs 2 cores / 2 threads, while the Sempron 3850 offers 4 cores / 4 threads — the Sempron 3850 has 2 more cores. Boost clocks reach 2 GHz on the Athlon 64 X2 4000+ versus 1.3 GHz on the Sempron 3850 — a 42.4% clock advantage for the Athlon 64 X2 4000+. The Athlon 64 X2 4000+ uses the Windsor (2006−2007) architecture (90 nm), while the Sempron 3850 uses Kabini (2013−2014) (28 nm). In PassMark, the Athlon 64 X2 4000+ scores 1,175 against the Sempron 3850's 1,168 — a 0.6% lead for the Athlon 64 X2 4000+.
| Feature | Athlon 64 X2 4000+ | Sempron 3850 |
|---|---|---|
| Cores / Threads | 2 / 2 | 4 / 4+100% |
| Boost Clock | 2 GHz+54% | 1.3 GHz |
| L3 Cache | 0 kB | — |
| L2 Cache | 512K | 2048 kB+300% |
| Process | 90 nm | 28 nm-69% |
| Architecture | Windsor (2006−2007) | Kabini (2013−2014) |
| PassMark | 1,175 | 1,168 |
| Geekbench 6 Single | 195 | — |
| Geekbench 6 Multi | 380 | — |
Memory & Platform
The Athlon 64 X2 4000+ uses the AM2 socket (PCIe 1.1), while the Sempron 3850 uses AM1 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Athlon 64 X2 4000+ | Sempron 3850 |
|---|---|---|
| Socket | AM2 | AM1 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR2-800 | — |
| Max RAM Capacity | 4 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 0 | — |
Advanced Features
Virtualization: AMD-V (Athlon 64 X2 4000+) / not specified (Sempron 3850). Primary use case: Athlon 64 X2 4000+ targets Legacy Desktop.
| Feature | Athlon 64 X2 4000+ | Sempron 3850 |
|---|---|---|
| Integrated GPU | No | — |
| IGPU Model | None | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Legacy Desktop | — |
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