Phenom X4 9750B vs Ryzen 7 3700X
Phenom X4 9750B
Ryzen 7 3700X
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. The Phenom X4 9750B is positioned at rank #1047 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Phenom X4 9750B
Performance Per Dollar Ryzen 7 3700X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom X4 9750B | Ryzen 7 3700X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($34) | ⚠️ Higher cost ($140) |
| Longevity | 🛑 Legacy (Agena (2007−2008) / 65 nm) | ✨ Modern (Matisse (Zen 2) (2019−2020) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Phenom X4 9750B | Ryzen 7 3700X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+258%) |
| Upfront Cost | ✅ More affordable ($34) | ⚠️ Higher cost ($140) |
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 Phenom X4 9750B and Ryzen 7 3700X
Phenom X4 9750B
The Phenom X4 9750B is manufactured by AMD. It was released in 2009-01-01. It is based on the Agena (2007−2008) architecture. It features 4 cores and 4 threads. Max frequency: 2.4 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 95 Watt. Passmark benchmark score: 1,520 points. Launch price was $149.
Ryzen 7 3700X
The Ryzen 7 3700X is manufactured by AMD. It was released in 7 July 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 4.4 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 22,430 points. Launch price was $329.
Processing Power
The Phenom X4 9750B packs 4 cores / 4 threads, while the Ryzen 7 3700X offers 8 cores / 16 threads — the Ryzen 7 3700X has 4 more cores. Boost clocks reach 2.4 GHz on the Phenom X4 9750B versus 4.4 GHz on the Ryzen 7 3700X — a 58.8% clock advantage for the Ryzen 7 3700X. The Phenom X4 9750B uses the Agena (2007−2008) architecture (65 nm), while the Ryzen 7 3700X uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the Phenom X4 9750B scores 1,520 against the Ryzen 7 3700X's 22,430 — a 174.6% lead for the Ryzen 7 3700X. L3 cache: 2 MB (total) on the Phenom X4 9750B vs 32 MB on the Ryzen 7 3700X.
| Feature | Phenom X4 9750B | Ryzen 7 3700X |
|---|---|---|
| Cores / Threads | 4 / 4 | 8 / 16+100% |
| Boost Clock | 2.4 GHz | 4.4 GHz+83% |
| Base Clock | — | 3.6 GHz |
| L3 Cache | 2 MB (total) | 32 MB+1500% |
| L2 Cache | 512 kB (per core) | 512K (per core) |
| Process | 65 nm | 7 nm, 12 nm-89% |
| Architecture | Agena (2007−2008) | Matisse (Zen 2) (2019−2020) |
| PassMark | 1,520 | 22,430+1376% |
| Geekbench 6 Single | 300 | — |
| Geekbench 6 Multi | 1,000 | — |
Memory & Platform
The Phenom X4 9750B uses the AM2+ socket (PCIe 2.0), while the Ryzen 7 3700X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-1066 on the Phenom X4 9750B versus DDR4-3200 on the Ryzen 7 3700X — the Ryzen 7 3700X supports 66.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 3700X supports up to 128 GB of RAM compared to 8 GB — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Phenom X4 9750B) vs 24 (Ryzen 7 3700X) — the Ryzen 7 3700X offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AM2+,AM2 (Phenom X4 9750B) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 3700X).
| Feature | Phenom X4 9750B | Ryzen 7 3700X |
|---|---|---|
| Socket | AM2+ | AM4 |
| PCIe Generation | PCIe 2.0 | PCIe 4.0+100% |
| Max RAM Speed | DDR2-1066 | DDR4-3200+100% |
| Max RAM Capacity | 8 GB | 128 GB+1500% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 16 | 24+50% |
Advanced Features
Virtualization: AMD-V (Phenom X4 9750B) / not specified (Ryzen 7 3700X). Primary use case: Phenom X4 9750B targets Legacy Desktop.
| Feature | Phenom X4 9750B | Ryzen 7 3700X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Legacy Desktop | — |
Value Analysis
The Phenom X4 9750B launched at $215 MSRP, while the Ryzen 7 3700X debuted at $329. At current prices ($34 vs $140), the Phenom X4 9750B is $106 cheaper. In terms of value (PassMark points per dollar), the Phenom X4 9750B delivers 44.7 pts/$ vs 160.2 pts/$ for the Ryzen 7 3700X — making the Ryzen 7 3700X the 112.7% better value option.
| Feature | Phenom X4 9750B | Ryzen 7 3700X |
|---|---|---|
| MSRP | $215-35% | $329 |
| Avg Price (30d) | $34-76% | $140 |
| Performance per Dollar | 44.7 | 160.2+258% |
| Release Date | 2008 | 2019 |
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